
Contents
OVERVIEW
SECTION 1 – PLATFORM MEMORY ARCHITECTURE
SECTION 2 – P620 MEMORY CONFIGURATION
SECTION 3 – P620 SUPPORTED MEMORY
SECTION 4 – DOCUMENT REVISION HISTORY

Overview
The purpose of this document is to provide guidelines for users on how to
optimally configure the system memory in the ThinkStation P620 platform in
order to provide the best performance.
Section 1 – Platform Memory Architecture
The launch of the AMD Threadripper Pro platform brings with it some important
updates to the memory system architecture. The main feature is the 8-channel
memory architecture and a higher top supported memory bus speed. The 8channel memory architecture allows P620 to have individual memory channel
for each DIMM slot, hence providing increased memory performance and
bandwidth.

The ThinkStation P620 is Lenovo’s newest mainstream single CPU
workstation. The platform has a total of 8 DIMM slots with a top supported
memory bus speed of 3200MHz. The P620 takes full advantage of the 8
memory channels offered by the AMD Threadripper Pro CPU, allowing the
system to offer high speed and better throughput. Figure 1 below shows a
visual reference of the DIMM slot layout for the P620 platform.
Lenovo’s ThinkStation P620 supports 16/32/64GB DDR4 ECC RDIMM and 128GB
3DS RDIMM which will be available later this year, at the maximum memory bus
speed of 3200MHz. P620 workstation offers a maximum memory capacity of 512GB
with 8x 64GB RDIMMs and 1TB with 8x 128GB 3DS RDIMMs.
Figure 1 – P620 Motherboard DIMM Layout
Section 3 – P620 Supported Memory
Section 2 – P620 Memory Configurations

Due to memory architecture within the AMD CPU and its support for memory
interleaving, Lenovo recommends the following guidelines for obtaining the
best memory bandwidth from the P620 workstation:
• Memory should only be installed in combinations of 1, 2, 4, or 8 DIMMs.
Utilizing all 8 DIMM slots will yield maximum memory bandwidth
performance.
• DIMM slots should be filled in the order listed in Figure 2.
• Lenovo recommends having at least 2 DIMMs for 12 and 16 core
CPU’s, and 4 DIMMs for 32 and 64 core CPU’s.
Figure 2(a) – P620 Slot Fill Order Recommendations
DIMM slot 1, DIMM slot 2, DIMM slot 7, DIMM slot 8
DIMM slot 1, DIMM slot 2, DIMM slot 3, DIMM slot 4, DIMM slot 5, DIMM slot 6,
DIMM slot 7, DIMM slot 8

Section 4 – Document Revision History