Front bays Ma-
x. 
Am-
bi-
ent 
Te-
mp. 
(at 
sea 
lev-
el)
Processor Heat 
sink
Fan 
type
Ma-
x. 
PCI-
e/ 
OCP 
Qty
Cable
•  10 x 2.5" AnyBay
•  10 x 2.5" NVMe
•  10 x 2.5" SAS/SATA
•  8 x2.5'' SAS/SATA
•  6 x 2.5" SAS/SATA + 4 x 
2.5" AnyBay
•  6 x 2.5" SAS/SATA + 2 x 
2.5" AnyBay + 2 x 2.5" 
NVMe
•  16-EDSFF
30°C 
A and B Perf Perf 3
AOC/DAC
25°C E (except 9654/9654P processors) CL
n-
ote
Perf 3 Without 
100G AOC
25°C E (9654/9654P processors only) Perf Perf 3 Without 
100G AOC
30°C 
E 
CL
n-
ote
Perf 3 Without 
100G AOC
•  4x2.5'' SAS/SATA
•  4x2.5'' NVMe
•  4x2.5' AnyBay
30°C
B Perf Perf 3
AOC/DAC
30°C
A Perf Perf 3
AOC/DAC
25°C E (except 9654/9654P/9174F/9554/ 
9554P processors)
CL Perf 3 AOC/DAC
25°C E (9174F/9554/9554P processors only) Perf Perf 3 AOC/DAC
30°C E (9654/9654P processors only) Perf Perf 3 AOC/DAC
30°C E (except 9654/9654P processors ) CL Perf 3 Without 
100G AOC
Fan locations and supported quantity for different configurations
The supported fan quantity and suggested installation slots vary with different configurations. See the 
following table for details.
Configurations
Limiting conditions Fan 
quan-
tity
Fan type Fan 
loca-
tions 
(slots)
Fan 
dum-
my 
quan-
tity
•  16-EDSFF
•  4x2.5'' SAS/SATA
•  4x2.5'' NVMe
•  4x2.5' AnyBay
•  No OCP module installed on the rear and 
no 2nd BMC manager port adapter 
installed
•  No adapter installed in PCIe slot 1
•  No GPU adapter
6 Perf 2, 3, 4, 
5, 6, 7
2
Other scenarios except the above
7
Perf 1, 2, 3, 
4, 5, 6, 
7
1
58 ThinkSystem SR635 V3 User Guide