AOpen AP5VM-HW User Manual

Chapter 2

Hardware Installation

This chapter gives you a step-by-step procedure on how to install your system.
Follow each section accordingly.

Caution: Electrostatic discharge (ESD) can
damage your processor, disk drives, expansion
boards, and other components. Always observe
the following precautions before you install a
system component.

1. Do not remove a component from its
protective packaging until you are ready to
install it.

2. Wear a wrist ground strap and attach it to
a metal part of the system unit before
handling a component. If a wrist strap is
not available, maintain contact with the
system unit throughout any procedure
requiring ESD protection.

2-1

Hardware Installation

PWR 1

JP20

JP18

JP4

COM1

COM2

JP10

JP9

JP7

1

2.1 Jumper and Connector Locations

The following figure shows the locations of the jumpers and connectors on the
system board:

3

I
S
A

BIO

KBC

USB

I

I

S

S

A

A

1

2

S

RTC

FAN

PCI
4

PCI
3

PCI
2

PCI
1

PRINTER

JP3

PS2 MS

KB

D

S

I
M
M

4

FDC1

IDE1IDE2

S

S

S

I
M
M

3

I

I

I

M

M

M

M

M

M

1

1

2

HDD LED

JP8

JP11

JP12

IrDA

PANEL

2-2

Hardware Installation

Jumpers:

JP1,JP2: CPU frequency ratio select
JP3,JP4: CPU external (bus) clock select
JP7: CPU core voltage setting (Vcore)
JP8: I/O voltage setting (Vio)
JP9,JP10, JP11,JP12 CPU type

(Single/Dual voltage, Vcpuio) selection
JP14: For clearing CMOS
JP18: Enable/disable onboard super I/O controller
JP20: Enable/disable onboard PS/2 mouse
JP25: DIMM memory type select

Connectors:

KB1: AT keyboard connector
PWR1: AT (PS/2) power connector
PS2 MS: PS/2 mouse connector
USB: USB connector
COM1: COM1 connector
COM2: COM2 connector
FDC1: Floppy drive connector
PRINTER: Printer connector
IDE1: IDE1 primary channel
IDE2: IDE2 secondary channel
FAN: CPU fan connector
IrDA: IrDA (Infrared) connector
HDD LED: HDD LED connector
PANEL: Front-panel (Multifunction) connector

2-3

Hardware Installation

3

3

2.2 Jumper Settings

Board jumpers are made of pin headers and plastic connecting caps. These
are included in the mainboard design to enable you to customize your
hardware. The onboard jumpers are normally set to its default and optimum
setting. Be sure you have basic knowledge of computer hardware and
understand the function of the jumper before you change any setting.

Pin 1 of a jumper is indicated by a bold line on the mainboard. You may also
find number indications on the board to specify the proper configuration of the
jumper.

To set a jumper, simply connect the plastic cap to the required pins. For
example, to set a jumper to 1-2, place the plastic cap on pins 1-2 of the
jumper. An OPEN setting means that no plastic cap connected to the jumper
pins.

1
2

Open

Short

1
2

Jumper set at 1-2

1
2

Jumper set at 2-3

1
2

2-4

2.2.1 Setting the CPU Voltage

11

12

11

12

11

12

11

12

11

12

Hardware Installation

JP7

1-2
3-4
5-6
7-8
9-10
11-12

CPU Core Voltage (Vcore)

JP7 is used to select CPU core
voltage (Vcore), normally it is set

3.45V (Intel P54C or IDT C6)

3.52V (Cyrix or AMD K5)

2.9V (K6-166/200 or M2)

2.8V (MMX P55C)

3.2V (AMD K6-233)

2.1V (Reserved)

to default 3.45V for INTEL
Pentium P54C. It must be
changed if you have CPU with
different core voltage, such as
INTEL PP/MT MMX (P55C),
AMD K5/K6 and Cyrix 6x86,
refer to the CPU specification for
more details.

JP7

1
3
5
7
9

3.45V
P54C

IDT C6

10

JP7

1

2

3

4

5

6

7

8

9

10

3.52V

6x86 or

K5

JP7

1

2
4
6
8

2

3

4

5

6

7

8

9

10

2.9V

K6-166

1
3
5
7
9

2.8V

MMX P55C

K6-200

M2

Warning: The heat dissipation of Intel PP/MT-233Hz, AMD
K6-200/233MHz exceed the original design of this mainboard.
Please make sure that you have installed CPU fan properly if
Intel PP/MT-233 or AMD K6-200/233 is being selected to use.
It may cause your system unstable if you can not meet the
heat dissipation requirement from above CPU type. It is
recommended to adopt larger fan on these CPU for better air
flow in the system.

JP7

JP7

1

2
4
6
8

10

2

3

4

5

6

7

8

9

10

3.2V

K6-233

2-5

Hardware Installation

1 2

3 4

1 2

3 4

JP8

1-2
3-4

I/O Voltage (Vio)

3.45V (default)

3.52V

JP8 is reserved for testing purposes
only. This jumper enables you to set
the voltage of the onboard chipset and
PBSRAM (Vio). For dual-voltage CPU,
JP8 also functions as CPU I/O voltage
(Vcpuio) controller. The default voltage
setting is 3.45V.

JP8

3.45V

JP8

3.52V

(default)

2-6

Hardware Installation

2 4

1 3

2 4

1 3

2 4

1 3

2 4

1 3

2 4

1 3

2 4

1 3

2 4

1 3

2 4

1 3

JP9

1-2 &
3-4

Open

JP10

Open

1-2 &
3-4

JP11

1-2 &
3-4

Open

JP12

Open

1-2 &
3-4

CPU Type (Vcpuio)

Single Voltage CPU
Vcpuio = Vcore (default)

Dual Voltage CPU
Vcpuio = Vio (PP/MT P55C)

Set the jumpers JP9, JP10, JP11, and JP12 according to the type of CPU
currently supported. These jumpers are actually for selecting the CPU I/O
voltage (Vcpuio). Normally, for single-voltage CPU such as P54C, AMD K5
and Cyrix 6x86, Vcpuio is equal to Vcore. However, for CPU that needs dual
voltage such as PP/MT (P55C) and Cyrix 6x86L, Vcpuio is different from Vcore
and must be set to Vio.

JP11 &
JP12

JP9 &
JP10

JP11 JP9

JP12 JP10

Single voltage

(Vcpuio = Vcore)

JP11 JP9

JP12 JP10

Dual voltage

(Vcpuio = Vio)

2-7

Hardware Installation

CPU
Type

Intel
P54C

Intel
MMX
(P55C)

AMD K5
(Single
voltage)

AMD
K6­166/200

AMD
K6-233

Cyrix
6x86

Cyrix
6x86L

Cyrix M2 2.9V 3.45V Vio 5-6 1-2 Open 1-2,

IDT C6 3.45V 3.45V Vcore 1-2 1-2 1-2,

Vcore Vio Vcpuio JP7 JP8 JP9 JP10 JP11 JP12

3.45V 3.45V Vcore 1-2 1-2 1-2,

2.8V 3.45V Vio 7-8 1-2 Open 1-2,

3.52V 3.45V Vcore 3-4 1-2 1-2,

2.9V 3.45V Vio 5-6 1-2 Open 1-2,

3.2V 3.45V Vio 9-10 1-2 Open 1-2,

3.52V 3.45V Vcore 3-4 1-2 1-2,

2.8V 3.45V Vio 7-8 1-2 Open 1-2,

Open 1-2,

3-4

3-4

Open 1-2,

3-4

3-4

3-4
Open 1-2,

3-4

3-4

3-4
Open 1-2,

3-4

Caution: The above table lists the possible settings only for
the current CPUs on the market. The settings may vary in
case there is a new CPU product introduced in the market.
See your CPU specifications for details.

Open

3-4
Open 1-2,

3-4

Open

3-4

Open 1-2,

3-4

Open 1-2,

3-4
Open

3-4
Open 1-2,

3-4

Open 1-2,

3-4
Open

3-4

2-8

Hardware Installation

2.2.2 Selecting the CPU Frequency

JP1

1-2
2-3
2-3
1-2

JP2

1-2
1-2
2-3
2-3

CPU Frequency
Ratio

1.5x (3.5x)
2x

2.5x (1.75x)
3x

The Intel Pentium, Cyrix 6x86 and
AMD K5/K6 CPUs have different
internal (Core) and external (Bus)
frequency. The ratio of Core/Bus
frequency that the CPU uses to
multiply the external clock and
produce internal frequency is selected
by setting JP1 and JP2.

Core frequency = Ratio x External

bus clock

JP1 & JP2

1 2 3

1.5x (3.5x)

JP1 & JP2

1 2 3

2.5x (1.75x)

JP1 & JP2

1 2 3

2x

JP1 & JP2

1 2 3

3x

Note: Intel PP/MT MMX 233MHz is using 1.5x
jumper setting for 3.5x frequency ratio, and AMD
PR166 is using 2.5x setting for 1.75x frequency
ratio.

JP3

2-3
1-2
2-3

JP4

2-3
2-3
1-2

CPU External Clock

50MHz
60MHz
66MHz

JP3 and JP4 let you set the CPU
external clock (bus clock), i.e., the
clock generator frequency.

2-9

Hardware Installation

JP3 & JP4

1 2 3

50MHz

JP3 & JP4

1 2 3

60MHz

JP3 & JP4

1 2 3

66MHz

Caution: The below table lists the possible
settings only for the current CPUs on the
market. The settings may vary in case there is
a new CPU product introduced in the market.
See your CPU specifications for details.

Intel Pentium CPU Core

Frequency

P54C 75 75MHz = 1.5x 50MHz 1-2 & 1-2 2-3 & 2-3
P54C 90 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3
P54C 100 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2
P54C 120 120MHz = 2x 60MHz 2-3 & 1-2 1-2 & 2-3
P54C 133 133MHz = 2x 66MHz 2-3 & 1-2 2-3 & 1-2
P54C 150 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3
P54C 166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2
P54C 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2

Ratio External Bus

Clock

JP1 & JP2 JP3 & JP4

Intel Pentium

P55C

PP/MT 150 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3
PP/MT 166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2
PP/MT 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2
PP/MT 233 233MHz = 3.5x 66MHz 1-2 & 1-2 2-3 & 1-2

IDT C6 CPU Core

WinChip 180 180MHz = 3x 60MHz 1-2 & 2-3 1-2 & 2-3
WinChip 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2

CPU Core

Frequency

Frequency

Ratio External Bus

Clock

Ratio External Bus

Clock

JP1 & JP2 JP3 & JP4

JP1 & JP2 JP3 & JP4

2-10

Hardware Installation

Cyrix 6x86 CPU Core

Frequency

P120+ 100MHz = 2x 50MHz 2-3 & 1-2 2-3 & 2-3
P150+ 120MHz = 2x 60MHz 2-3 & 1-2 1-2 & 2-3
P166+ 133MHz = 2x 66MHz 2-3 & 1-2 2-3 & 1-2

Cyrix M2 CPU Core

Frequency

MX-PR166 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3
MX-PR200 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2
MX-PR233 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2
MX-PR266 233MHz = 3.5x 66MHz 1-2 & 1-2 2-3 & 1-2

AMD K5 CPU Core

Frequency

PR90 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3
PR100 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2
PR120 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3
PR133 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2
PR166 116MHz = 1.75x 66MHz 2-3 & 2-3 2-3 & 1-2

AMD K6 CPU Core

Frequency

PR2-166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2
PR2-200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2
PR2-233 233MHz = 3.5x 66MHz 1-2 & 1-2 2-3 & 1-2

Ratio External

Bus Clock

Ratio External Bus

Clock

Ratio External

Bus Clock

Ratio External

Bus Clock

JP1 & JP2 JP3 & JP4

JP1 & JP2 JP3 & JP4

JP1 & JP2 JP3 & JP4

JP1 & JP2 JP3 & JP4

Notes: The Cyrix 6x86 and AMD K5 CPUs use
P-rating for the reference of CPU benchmark.
Unlike the Intel P54C, their internal core frequency
is not exactly equal to P-rating marked on the
CPU. For example, the AMD PR133 frequency is
100MHz, but its performance is almost equal to
Intel P54C 133MHz.

The Intel VX chipset does not support CPU with
55MHz and 75MHz external bus clock; thus, this
motherboard cannot support Cyrix P133+ and C6-

150.

2-11