Technical Rules For Gpu Adapters; Technical Rules For System Fans; Environmental Restrictions - Lenovo ThinkSystem SR645 Maintenance Manual

Technical rules for GPU adapters

Understanding the technical rules helps you choose the correct GPUs and install them in the supported slots
based on what is configured for your server.
The following are installation rules for installing GPUs for your server:
• Performance fan must be selected.
• PCIe SSD adapter is not supported.
• PCIe slot priority when one processor is installed:
– Tesla T4, P620: Slot 1, slot 2
– P2200: Slot 2
• PCIe slot priority when two processors are installed:
– Tesla T4, P620: Slot 1, slot 3, slot 2
– P2200: Slot 2
• Maximum quantity supported:
When processor TDP is...
≤ 200W
≥225W

Technical rules for system fans

Depending on models, the server supports:
• Standard fan (21000 RPM)
• Performance fan (24000 RPM)
The following lists the required fans when different processors are installed.
Server model
4 x 2.5'', 4 x 3.5'',
8 x 2.5'' models
10 x 2.5'' models
backplane-less
Notes:
• Standard fans are enough for low-wattage processors while you can still use performance fans for better
cooling.
• If there is an OCP 3.0 Ethernet adapter installed, when the system is powered off but still plugged in to AC
power, fans 5 and fan 6 will continue to spin at a much lower speed. This is the system design to provide
proper cooling for the OCP 3.0 Ethernet adapter.

Environmental restrictions

Use this topic to understand the environmental restrictions for different server models.
Maximun. quantity supported
3
2
Note: Slot priority: slot 1, slot 3
120W 155W
Standard Standard
Standard Performance
NA
NA
Processor TDP
180W-240W
Performance
Performance
NA
.
Chapter 4 Hardware replacement procedures
280 W
NA
NA
Performance
105