Lenovo ThinkServer RD650 User Manual And Hardware Maintenance Manual page 22

Power supply
• One or two 550-watt hot-swap redundant power supplies (Universal input and compliant with 80 PLUS
Platinum)
• One or two 750-watt hot-swap redundant power supplies (Universal input and compliant with 80 PLUS
Platinum)
• One or two 750-watt hot-swap redundant power supplies (High line input and compliant with 80 PLUS
Titanium)
• One or two 1100-watt hot-swap redundant power supplies (Universal input and compliant with 80
PLUS Platinum)
• One or two 1600-watt hot-swap redundant power supplies (High line input and compliant with 80
PLUS Platinum)
Notes:
– When the 1600-watt power supply works with low line input, the output power changes to 1100 watt.
– If you are using uninterruptible power supplies (UPS), ensure that you use only pure-sine UPSes
with your ThinkServer server.
System fans
Your server supports up to six hot-swap system fans. This design helps you avoid significant cooling
problems when a system fan fails. You can replace a system fan without turning off the server. To locate the
system fans, see "System board components" on page 44.
• If your server is installed with one microprocessor, four system fans (fan 1 to fan 4) are adequate to
provide proper cooling. However, you must keep the locations for fan 5 and fan 6 occupied by dummy
fans to ensure proper airflow.
• If your server is installed with two microprocessors, ensure that all the six system fans are installed to
avoid cooling problems.
Internal drives
Internal drives are devices that your server uses to read and store data. The internal drives supported
by your server vary by model.
• Internal storage drive
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ThinkServer RD650 User Guide and Hardware Maintenance Manual