Owners Manual
Conguration Number of
processors
Heatsink Processor/
DIMM blank
DIMM blanks Maximum number
of DIMM blanks
Fan
CPU=200/205 W
and 150 W/165 W
FO*
XC640 Series
(3.5 inch hard drives x
4)
1 One 1U standard
heat sink for CPU ≤
165 W
No Required for
processor 1
11 blanks Five standard fans
One 1U 2-pipe heat
sink for CPU=150
W/165 W FO*
One 1U 2-pipe heat
sink for
CPU=200/205 W
2 Two 1U standard
heat sink for CPU ≤
165 W
Two 1U 2-pipe heat
sink for CPU=150
W/165 W
Yes Eight high
performance fans
Two 1U 2-pipe heat
sink for
CPU=200/205 W
No Required 22 blanks Eight standard fans
Eight high
performance fans
NOTE: *165 W and 150 W frequency optimized includes Intel Xeon Gold 6146 and 6144 processors.
Ambient temperature limitations
The following table lists congurations that require ambient temperature less than 35°C.
NOTE
: The ambient temperature limit must be adhered to ensure proper cooling and to avoid excess processor throttling, which
may impact system performance.
Table 30. Conguration based ambient temperature restrictions
System Front Backplane Processor Thermal
Design Power
Processor Heat Sink Fan Type Ambient Restriction
XC640 Series
10 x 2.5 inch SAS/
SATA hard drives
4 x 3.5 inch SAS/SATA
and NVMe drives
200 W, 205 W 2 pipe 1U high
performance
High performance
fan
30°C
10 x 2.5 inch SAS/
SATA and NVMe
drives(4)
165 W, 200 W, 205
W
2 pipe 1U high
performance
High performance
fan
30°C
Technical specications 29