No part of this manual, including the products and software described in it, may be reproduced,
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Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
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INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
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Offer to Provide Source Code of Certain Software
This product may contain copyrighted software that is licensed under the General Public License (“GPL”)
and under the Lesser General Public License Version (“LGPL”). The GPL and LGPL licensed code in this
product is distributed without any warranty. Copies of these licenses are included in this product.
You may obtain the complete corresponding source code (as dened in the GPL) for the GPL Software,
and/or the complete corresponding source code of the LGPL Software (with the complete machinereadable “work that uses the Library”) for a period of three years after our last shipment of the product
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(1) for free by downloading it from http://support.asus.com/download;
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ii
Contents
Safety information ...................................................................................................... vi
About this guide ........................................................................................................ vii
SABERTOOTH Z77 specications summary ........................................................... ix
• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.
• When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
• Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
• Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
• Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
• If the power supply is broken, do not try to x it by yourself. Contact a qualied service
technician or your retailer.
Operation safety
• Before installing the motherboard and adding devices on it, carefully read all the manuals
that came with the package.
• Before using the product, ensure all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
• To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
• Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may become wet.
• Place the product on a stable surface.
• If you encounter technical problems with the product, contact a qualied service
technician or your retailer.
vi
About this guide
This user guide contains the information you need when installing and conguring the motherboard.
How this guide is organized
This guide contains the following parts:
• Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it
supports.
• Chapter 2: Hardware information
This chapter lists the hardware setup procedures that you have to perform when
installing system components. It includes description of the switches, jumpers, and
connectors on the motherboard.
• Chapter 3: BIOS setup
This chapter tells how to change system settings through the BIOS Setup menus.
Detailed descriptions of the BIOS parameters are also provided.
• Chapter 4: Software support
This chapter describes the contents of the support DVD that comes with the
motherboard package and the software.
• Chapter 5: Multiple GPU technology support
This chapter describes how to install and congure multiple ATI® CrossFireX™,
NVIDIA® SLI™ graphics cards, and LucidLogix Virtu MVP.
Where to nd more information
Refer to the following sources for additional information and for product and software updates.
1. ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
2. Optional documentation
Your product package may include optional documentation, such as warranty yers,
that may have been added by your dealer. These documents are not part of the
standard package.
vii
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING: Information to prevent injury to yourself when trying to
complete a task.
CAUTION: Information to prevent damage to the components when trying to
complete a task.
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Typography
Bold text Indicates a menu or an item to select.
Italic
s Used to emphasize a word or a phrase.
<Key> Keys enclosed in the less-than and greater-than sign means
that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1> + <Key2> + <Key3> If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).
Example: <Ctrl> + <Alt> + <Del>
viii
SABERTOOTH Z77 specications summary
CPULGA 1155 socket for Intel® 3rd/2nd generation Core™ i7/i5/i3/
ChipsetIntel® Z77 Express Chipset
Memory4 x DIMM, Max. 32GB, DDR3 1866/1600/1333/1066 MHz,
Expansion Slots2 x PCI Express 3.0*/2.0 x16 slots (single at x16, dual at x8/x8)
Multi-GPU SupportIntegrated Graphics Processor - Intel HD Graphics support
StorageIntel® Z77 Express Chipset
LANIntel® 82579V Gigabit LAN controller
AudioRealtek® ALC892 8-channel High Denition Audio CODEC
Pentium®/Celeron® Processors
Supports 22/32nm CPU
Supports Intel® Turbo Boost Technology 2.0
* The Intel® Turbo Boost Technology 2.0 support depends on the
CPU types
** Refer to www.asus.com for Intel CPU support list
non-ECC, un-buffered memory
Dual channel memory architecture
Supports Intel® Extreme Memory Prole (XMP)
* Hyper DIMM support is subject to the physical characteristics
of the individual CPUs. Please refer to Memory QVL (Qualied
Vendors) list for details.
** Refer to www.asus.com or this user manual for the Memory
QVL (Qualied Vendors Lists)
1 x PCI Express 2.0 x16 slot** [black] (Max. at x4 mode,
compatible with PCIe x1 and x4 devices)
3 x PCI Express 2.0 x1 slots
* PCIe 3.0 speed is supported by Intel® 3rd generation Core™
processors.
** The PCIe 2.0 x16 slot shares bandwidth with PCIe 2.0 x1_1
slot, PCIe 2.0 x1_2 slot, and PCIe 2.0 x1_3 slot. The PCIe 2.0
x16 slot default setting is in x1 mode.
- 2 x eSATA 6Gb/s ports (red)
* Supports on Intel® Core processor family with Windows 7
operating systems.
** These SATA ports are for data hard drivers only. ATAPI devices
are not supported.
Other Special FeaturesUSB 3.0 Boost featuring the latest USB 3.0 UASP standard
UASP Mode*
- 4 x USB 3.0 ports (2 ports at mid-board, 2 ports at back panel)
ASMedia® 1042 USB 3.0 controllers - supports ASUS USB 3.0
Boost UASP Mode
- 2 x USB 3.0 ports at the back panel (blue)
Intel® Z77 Express Chipset
- 10 x USB 2.0/1.1 ports (6 ports at mid-board, 4 ports at back
panel)
* USB 3.0 ports only support Windows® 7 or later versions. UASP standard only supports Windows® OS versions that
are released after Windows® 7.
- TUF Thermal Armor
- TUF Thermal Radar
“TUF ENGINE!” Power Design
- 8+4+2 Digital Phase Power Design
- TUF Components (Choke, Cap. & MOSFET; certied by
military-standard)
- ASUS DIGI+ Power Control Utility
“Safe & Stable!” Guardian Angel
- Dust Defender
- ESD Guards
- MemOK!
- Anti Surge
USB BIOS Flashback with USB BIOS Flashback Wizard for EZ
BIOS download scheduling
USB Charger+ featuring quick-charging function for all devices
Network iControl featuring instant network bandwidth domination
for top network program in use
LucidLogix Virtu MVP
ASUS UEFI BIOS EZ Mode featuring friendly graphics user
interface
AI Suite II
ASUS Q-Connector
ASUS Q-Shield
ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED)
ASUS Q-Slot
ASUS Q-DIMM
ASUS O.C. Prole
ASUS CrashFree BIOS 3
ASUS EZ Flash 2
ASUS MyLogo 2™
Multi-language BIOS
(continued on the next page)
x
SABERTOOTH Z77 specications summary
Back Panel I/O Ports1 x DisplayPort
Internal I/O Connectors1 x USB 3.0/2.0 connector supports additional 2 USB 3.0/2.0
Form factorATX form factor: 12 in. x 9.6 in. (30.5 cm x 24.4 cm)
*Specications are subject to change without notice.
1 x HDMI port
1 x Optical S/PDIF Output
1 x USB BIOS Flashback Button
2 x eSATA 6Gb/s ports
1 x LAN (RJ-45) port
4 x USB 3.0/2.0 ports (blue, 1 supports USB BIOS Flashback)
4 x USB 2.0/1.1 ports
8-channel Audio I/O ports
ports (19-pin; moss green)
3 x USB 2.0/1.1 connectors support additional 6 USB 2.0/1.1
ports
4 x SATA 6Gb/s connectors (2 x brown; 2 x gray)
4 x SATA 3Gb/s connectors (black)
1 x CPU Fan connector (4-pin black)
1 x CPU OPT fan connector (4-pin black)
4 x Chassis Fan connectors (4-pin black)
2 x Assistant Fan connectors (3-pin white)
1 x Front panel audio connector (AAFP)
1 x S/PDIF Out header
1 x 24-pin EATX Power connector
1 x 8-pin EATX 12V Power connector
1 x System Panel (Q-Connector)
1 x MemOK! button
1 x Clear CMOS jumper
SM BIOS 2.5, ACPI 2.0a, Multi-language BIOS,
ASUS EZ Flash 2, ASUS CrashFree BIOS 3, F12 PrintScreen
Function, F3 Shortcut Function, and ASUS DRAM SPD (Serial
Presence Detect) memory information
ASUS Utilities
ASUS Update
Anti-virus software (OEM version)
xi
xii
Chapter 1
User Manual
3
M
Five-year warranty
Chapter 1: Product introduction
1.1 Welcome!
Thank you for buying an ASUS® SABERTOOTH Z77 motherboard!
The motherboard delivers a host of new features and latest technologies, making it another
standout in the long line of ASUS quality motherboards!
Before you start installing the motherboard, and hardware devices on it, check the items in
your package with the list below.
1.2 Package contents
Check your motherboard package for the following items.
Chapter 1
ASUS SABERTOOTH Z77
motherboard
2 x Serial ATA 6.0 Gb/s cables2 x Serial ATA 3.0 Gb/s cables
1 x ASUS Q-Shield2 x Accessory Fans1 x 2-in-1 ASUS Q-Connector kit
3 x PCIe x16 Slot dust covers3 x PCIe x1 Slot dust covers2 x DRAM slot dust covers
2 x short fan screws4 x long fan screws
User guideSupport DVD
1 x ASUS SLI™ bridge
connector
1 x Adhesive sponge for 35mm
fan
1 x TUF Five-year warranty
ASUS SABERTOOTH Z77
manual (by region)
• If any of the above items is damaged or missing, contact your retailer.
• The illustrated items above are for reference only. Actual product specications may
This motherboard supports the Intel® 3rd/2nd generation Core™ i7/i5/i3/Pentium®/Celeron®
processors in the LGA1155 package, with iGPU, memory, and PCI Express controllers
integrated to support onboard graphics out with dedicated chipsets, 2-channel (4 DIMMs)
DDR3 memory, and 16 PCI Express 3.0/2.0 lanes. This provides great graphics performance.
Intel® 3rd/2nd generation Core™ i7/i5/i3/Pentium®/Celeron® processors are among the most
powerful and energy efcient CPUs in the world.
Intel® Z77 Express Chipset
The Intel® Z77 Express Chipset is a single-chipset designed to support the 1155 socket Intel®
3rd/2nd generation Core™ i7/i5/ i3/Pentium®/Celeron® processors. It provides improved
performance by utilizing serial point-to-point links, allowing increased bandwidth and stability.
Additionally, Z77 chipset provides 4 USB 3.0 ports for 10 times faster data retrieval speed.
Moreover, Intel® Z77 Express Chipset can also enable iGPU function, letting users enjoy the
latest Intel® integrated graphic performance.
PCI Express® 3.0
PCI Express® 3.0 (PCIe 3.0) is the latest PCI Express bus standard with improved encoding
schemes that provide twice the performance of the current PCIe 2.0. The total bandwidth
for a x16 link reaches a maximum of 32Gb/s, double the 16Gb/s of PCIe 2.0 (in x16 mode).
As such, PCIe 3.0 provides users an unprecedented data speeds, combined with the
convenience and seamless transition offered by complete backward compatibility with PCIe
1.0 and PCIe 2.0 devices. PCIe 3.0 will become a must-have feature for users who wish to
improve and optimize graphic performance, as well as have the latest technology available to
them.
* PCI 3.0 speed is supported by Intel® 3rd generation Core™ processors.
Dual-Channel 1866 / 1600 / 1333 / 1066 MHz Support
The motherboard supports DDR3 memory that features data transfer rates of DDR3
1866 / 1600 / 1333 / 1066 MHz to meet the higher bandwidth requirements of the latest
3D graphics, multimedia, and Internet applications. The dual-channel DDR3 architecture
enlarges the bandwidth of your system memory to boost system performance.
Quad-GPU SLI™ and Quad-GPU CrossFireX™ Support
Flexible Multi-GPU Solutions, Your Weapon of Choice!
SABERTOOTH Z77 brings you the multi-GPU choice of either SLI™ or CrossFireX. The
motherboard features the most powerful Intel® Z77 platform to optimize PCIe allocation in
multiple GPU congurations. Expect a brand-new gaming style you’ve never experienced
before!
1-2
Chapter 1: Product Introduction
Intel® Smart Response Technology
SSD Speed with HDD Capacity
Intel® Smart Response Technology boosts overall system performance. It uses an installed
fast SSD (min 18.6GB available capacity required) as a cache for frequently accessed data.
Key benets include reduced load and wait times, and lower power consumption through the
elimination of unnecessary hard drive spin. This technology combines SSD performance with
hard drive capacity, operating up to 4X faster than a hard drive-only system, and an important
part of Green ASUS eco-friendly computing.
* Intel® Smart Response Technology is supported by 2nd/3rd generation Intel® Core™ processor
family on Windows® 7™ operating systems.
** Operating systems must be installed on the HDD to launch Intel® Smart Response Technology.
The capacity of the SSD is reserved for caching function.
Intel® Smart Connect Technology
Your computer could receive web updates with fresh content for selected applications even
when setting the system to sleep. This means less time waiting for applications to start,
update and sync with the Cloud, providing a more efcient way.
Intel® Rapid Start Technology
Allows your computer to quickly resume from a low-power hibernate state in seconds. Saving
system memory to the designed SSD provides your computer a faster wake-up response
time, while keeping the energy use low.
Complete USB 3.0 Integration
Double USB Access, Double Convenience
ASUS facilitates the strategic USB 3.0 accessibility for both the front and rear panel with 6
USB 3.0 ports in total. Experience the latest plug & play connectivity at speeds up to 10 times
faster than USB 2.0. The SABERTOOTH Z77 affords greater convenience to high speed
connectivity.
Chapter 1
Extra SATA 6.0 Gb/s Support
Extra Ports, Extra Speed and Accessibility
The Intel® Z77 Express Chipset natively supports the next-generation Serial ATA (SATA)
interface, delivering up to 6.0 Gb/s data transfer. ASUS provides extra SATA 6.0 Gb/s ports
with enhanced scalability, faster data retrieval, and double the bandwidth of current bus
systems.
1.3.2 “Ultimate COOL!” Thermal Solutions
TUF Thermal Armor
New generation Thermal Armor boosts cooling with dual turbo fans, enhancing the original
TUF thermal design, and helping direct hot air away from components and the motherboard
via smart shunt funneling. It covers the entire board with more powerful airow, and uses
special heat pipes to expedite thermal removal, and make sure temperatures stay low. The
dedicated I/O cover fan draws additional cold air in, and expels even more heat for improved
stability, plus new Thermal Armor comes with special convection holes in the PCB to facilitate
underside ow. It now sports a military-themed style, perfect for case modders.
ASUS SABERTOOTH Z77
1-3
TUF Thermal Radar
The TUF Thermal Radar monitors temperatures in critical parts of the motherboard in real
Chapter 1
time, automatically adjusting fan speeds to make sure the system maintains high stability.
It consists of multiple sensors, giving users the ability to track each individually. Automatic
calculation of ideal fan speeds based on different parameters selected manually for
components has everything cooler and longer-lasting. New Fan Overtime keeps the two
turbo fans running a few minutes post shutdown on standby power to remove the remaining
heat. Stopping high temperatures from lingering in the case where they can cause damage,
it extends system longevity, dropping the heat by as much as 7oC in just ten minutes. To
prolong fan lifespan, reduce noise, and lower power consumption, the new Fan Off has been
added, automatically shutting off fans under either preset or manually-selected temperature
thresholds.
1.3.3 “TUF ENGINE!” Power Design
New DIGI+ Power Control
New DIGI+ Power Control includes multiple digital voltage controllers, allowing extra precise
modulation and tuning of CPU, iGPU, and DRAM. This innovative and industry-leading ASUS
technology provides an extremely accurate voltage tuning for better efciency, stability, and
performance. With the next generation Intel VRD 12.5 future power design, CPU wattage can
be decreased by half, creating a cooler and quieter PC. This innovation of industry-leading
ASUS technology provides the smartest control for better power saving scenarios.
TUF Components (Choke, Cap. & MOSFET; certied by military-
standard)
Get rugged performance even in the most challenging conditions with robust TUF chokes,
solid capacitors, and MOSFETs – certied through third-party, military-grade testing. TUF
Chokes, also known as the “Alloy Choke”, is made of a compound of various types of
metal instead standard iron, enables the support of up to a massive 40A of rated current,
25% higher than conventional component. Furthermore, the single piece packaging also
eliminates the emission of vibration noise, delivering superb characteristics as well as
durability under extreme conditions.
1.3.4 “Safe & Stable!” Guardian Angel
Dust Defender
Dust particles and environmental contamination present a constant hazard to the optimal
functioning of slots and connectors. Build up on contact points within slots compromises
data transfer over time, negating the benets of expensive and critical components such
as graphics cards. Custom TUF design keeps this in mind with special shields that resist
particulate entry, effectively extending slot and connector lifespan while promoting better
performance.
MemOK!
MemOK! quickly ensures memory boot compatibility. This remarkable memory rescue tool
requires a mere push of a button to patch memory issues. MemOK! determines fail-safe
settings and dramatically improves your system boot success.
1-4
Chapter 1: Product Introduction
ESD Guards
ESD (Electrostatic Discharge) Guards provides protection against electrostatic discharges,
which can damage the motherboard’s components. The ASUS exclusive Anti-Static chip
and circuit design, and the I/O shield provide four times better protection and ensure the
motherboard’s lifespan.
1.3.5 ASUS EZ DIY
ASUS UEFI BIOS (EZ Mode)
ASUS UEFI BIOS is a mouse-controlled user-friendly graphics interface that allows you
to easily select performance settings, and drag and drop boot priorities with its EZ Mode
interface. Its Advanced Mode interface allows you to congure more advanced BIOS settings.
ASUS Q-Design
DIY Quickly, DIY Easily!
ASUS Q-Slot and Q-DIMM design speed up, simplify, and enhances your DIY (Do-It-Yourself)
experience.
ASUS Q-Shield
Easy and Comfortable Installations
The specially designed ASUS Q-Shield does without the usual "ngers" - making it
convenient and easy to install. With better electric conductivity, it ideally protects your
motherboard against static electricity and shields it against Electronic Magnetic Interference
(EMI).
ASUS Q-Connector
Make Connection Quick and Accurate!
The ASUS Q-Connector allows you to connect or disconnect the chassis front panel cables
in one easy step with one complete module. This unique adapter eliminates the trouble of
plugging in one cable at a time, making the connection quick and accurate.
ASUS EZ-Flash 2
ASUS EZ Flash 2 is a user-friendly utility that allows you to update the BIOS without using a
bootable oppy disk or an OS-based utility.
1.3.6 ASUS Exclusive Features
Chapter 1
USB 3.0 Boost
ASUS USB 3.0 Boost technology supports UASP (USB Attached SCSI Protocol) and
automatically increases a USB 3.0 device’s transfer speed up to 170%.
ASUS SABERTOOTH Z77
1-5
USB Charger+
With a dedicated onboard controller, quick-charge your USB devices such iProducts,
smartphones, tablets, and other portable devices 50% faster, even when the PC is powered
Chapter 1
off, in sleep, or hibernation.
* USB Charger+ only applies to the bottom port of USB3_12.
USB BIOS Flashback
With USB BIOS Flashback, simply connect a USB ash drive containing the UEFI BIOS le
to the USB 3.0 port, press the BIOS Flashback button for three seconds, and the BIOS is
updated automatically. With its Windows-compatible application, you can regularly check for
UEFI BIOS updates and download the latest UEFI BIOS automatically.
* USB BIOS Flashback only applies to the bottom port of USB3_12.
Network iControl
ASUS Network iControl is an intuitive one-stop network control center that makes it easier
for you to manage your network bandwidth and allows you to set, monitor, and schedule the
bandwidth priorities for your network programs. It also allows you to automatically connect to
a PPPoE network for a more convenient online experience.
1.3.7 Other special features
LucidLogix Virtu MVP
LucidLogix Virtu MVP featuring HyperFormance™ Technology boosts your PCIe graphics
card up to 30% beyond its original performance. Designed for Intel
Windows® 7 PCs, it perfectly combines the performance of discrete graphic cards with fast
computing iGPU. Also, with newly designed Virtual Sync, users can enjoy a smoother gaming
experience by eliminating tearing artifacts. LucidLogix Virtu MVP can also dynamically
assigns tasks to the best available graphics resource, based on power, performance, and
system load. This allows users to fully utilize 3x faster video conversion with Intel
Sync Video technology while retaining high-end 3D rendering and gaming performance,
provided by both NVIDIA and AMD graphic cards. When the PCIe graphic cards are not
required, the graphics control switches to the Intel® processor graphics, reducing the PCIe
graphics power use down to zero, making the system more environment-friendly. For users
searching for perfection, LucidLogix Virtu MVP provides great graphical performance, and
best quality and efciency.
* LucidLogix Virtu MVP supports Windows
** Intel® Quick Sync Video feature is supported by 3rd/2nd generation Intel® Core™ processor
family
®
operating system.
®
processor graphics and
®
Quick
1-6
Chapter 1: Product Introduction
DisplayPort 1.1a Support
DisplayPort is a digital display interface standard that delivers up to 10.8 Gbps of bandwidth
over standard cables, providing billions of colors and bidirectional communications, thus
enabling the fastest refresh rates, and the highest resolution digital display through a single
cable. Also, it supports HDCP copy protection for Blu-ray discs. Simply output 3D signals
through the connected DisplayPort 1.1a cable with your 3D display, then you can sit back and
enjoy a perfect 3D animation experience.
HDMI 1.4a Support
High Denition Multimedia Surface (HDMI) is a set of digital video standards that delivers
multi-channel audio and uncompressed digital video for full HD 1080p visuals through a
single cable. Supporting HDCP copy protection such as HD DVD and blu-ray discs, HDMI
provides you with the highest quality home theater experience.
ErP Ready
The motherboard is European Union’s Energy-related Products (ErP) ready, and ErP requires
products to meet certain energy efciency requirement in regards to energy consumption.
This is in line with ASUS vision of creating environment-friendly and energy-efcient products
through product design and innovation to reduce carbon footprint of the product and thus
mitigate environmental impacts.
Chapter 1
ASUS SABERTOOTH Z77
1-7
Chapter 1
1-8
Chapter 1: Product Introduction
Chapter 2
Chapter 2: Hardware information
2.1 Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
• Unplug the power cord from the wall socket before touching any component.
• Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due
to static electricity.
• Hold components by the edges to avoid touching the ICs on them.
• Whenever you uninstall any component, place it on a grounded antistatic pad or in the
bag that came with the component.
• Before you install or remove any component, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so
may cause severe damage to the motherboard, peripherals, or components.
ASUS SABERTOOTH Z77
2-1
2.2 Motherboard overview
2.2.1 Motherboard layout
Chapter 2
2-2
Refer to
2.2.8 Internal connectors
information about rear panel connectors and internal connectors.
and
2.3.11 Rear panel connection
Chapter 2: Hardware information
for more
Layout contents
Connectors/Jumpers/SlotsPage
1. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)2-24
2. CPU, chassis, and assistant fan connectors
(4-pin CPU_FAN, CHA_FAN1–4, CPU_OPT, 3-pin ASST_FAN)
3. LGA1155 CPU socket
4. DDR3 DIMM slots
5. MemOK! switch
6. USB 3.0 connector (20-1 pin USB3_34)
®
7. Intel
Z77 Serial ATA 6Gb/s connectors
(7-pin SATA6G_1/2 [brown])
®
8. Intel
Z77 Serial ATA 3Gb/s connectors
(7-pin SATA3G_3–6 [black])
®
9. ASMedia
Serial ATA 6Gb/s connectors
(7-pin SATA6G_E1/E2 [gray])
10. System panel connector (20-8 pin PANEL)
11. USB 2.0 connectors (10-1 pin USB56, USB78, USB910)
12. Standby power LED (SB_PWR)
13. Clear RTC RAM (3-pin CLRTC)
14. Front panel audio connector (10-1 pin AAFP)
15. Digital audio connector (4-1 pin SPDIF_OUT)
2-22
2-4
2-5
2-15
2-20
2-17
2-18
2-19
2-25
2-21
2-16
2-14
2-23
2-21
Chapter 2
ASUS SABERTOOTH Z77
2-3
2.2.2 Central Processing Unit (CPU)
The motherboard comes with a surface mount LGA1155 socket designed for the Intel®
3rd/2nd Generation Core™ i7 / Core™ i5 / Core™ i3 / Pentium / Celeron Processors.
Chapter 2
Ensure that all power cables are unplugged before installing the CPU.
• The LGA1156 CPU is incompatible with the LGA1155 socket. DO NOT install a
LGA1156 CPU on the LGA1155 socket.
• Upon purchase of the motherboard, ensure that the PnP cap is on the socket and
the socket contacts are not bent. Contact your retailer immediately if the PnP cap
is missing, or if you see any damage to the PnP cap/socket contacts/motherboard
components. ASUS will shoulder the cost of repair only if the damage is shipment/
transit-related.
• Keep the cap after installing the motherboard. ASUS will process Return Merchandise
Authorization (RMA) requests only if the motherboard comes with the cap on the
LGA1155 socket.
• The product warranty does not cover damage to the socket contacts resulting from
incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP
cap.
2-4
Chapter 2: Hardware information
2.2.3 System memory
The motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Modules
(DIMM) slots.
A DDR3 module is notched differently from a DDR or DDR2 module. DO NOT install a DDR
or DDR2 memory module to the DDR3 slot.
Recommended memory congurations
Chapter 2
ASUS SABERTOOTH Z77
2-5
Memory congurations
You may install 1GB, 2GB, 4GB and 8GB unbuffered and non-ECC DDR3 DIMMs into the
DIMM sockets.
Chapter 2
• You may install varying memory sizes in Channel A, and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• According to Intel CPU spec, DIMM voltage below 1.65V is recommended to protect
the CPU.
• Always install DIMMs with the same CAS latency. For optimum compatibility, we
recommend that you obtain memory modules from the same vendor.
• Due to the memory address limitation on 32-bit Windows OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
- Use a maximum of 3GB system memory if you are using a 32-bit Windows OS.
- Install a 64-bit Windows OS when you want to install 4GB or more on the
motherboard.
For more details, refer to the Microsoft® support site at
http://support.microsoft.com/kb/929605/en-us.
• This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less
(Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1 Megabyte/MB).
• The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
Under the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value. To operate at the vendor-marked
or at a higher frequency, refer to section
frequency adjustment.
• For system stability, use a more efcient memory cooling system to support a full