
S875WP1-E TPS
Connectors and Jumper Blocks
Revision 4.0
49
5.13 Miscellaneous Headers
5.13.1 Fan
Headers
The Intel Server Board S875WP1-E provides four 3-pin fan headers. All fans use direct 12 volts.
Four of the five fans, labeled “CPU_FAN”, “SYSFAN1”, “SYSFAN2” and “SYSFAN4” are wired
to a fan tachometer input of the Hardware Management ASIC. The third system fan, labeled
“SYSFAN3” is not wired to the input of the Hardware Management ASIC and therefore is not
monitored by any server management software.
Table 36. Three-Pin Fan Headers Pin-Out
Pin Signal
Name Type
Description
1
CNTL
Power
GROUND is the power supply ground
2 VREG_12V_POWER Power
12
V
3
Fan Tach
Out
FAN_TACH signal is connected to the Hardware Management ASIC to
monitor the fan speed
5.14 System Recovery and Update Jumper
CAUTION
Do not move any jumpers with the power on. Always turn off the power and unplug the power cord
from the computer before changing a jumper setting. Otherwise, the board could be damaged.
This 3-pin jumper block determines the BIOS Setup program mode. Table 37 describes the
jumper settings for the three modes: normal, configure, and recovery. When the jumper is set to
configuration mode and the computer is powered-up, the BIOS compares the CPU version and
the microcode version in the BIOS and reports if the two match.
Table 37. BIOS Setup Configuration Jumper Settings (J8J2)
Function/Mode
Jumper Setting
Configuration
Normal
1-2
1
3
The BIOS uses current configuration information and passwords for
booting.
Configure
2-3
1
3
After the POST runs, Setup runs automatically. The maintenance
menu is displayed.
Recovery
None
1
3
The BIOS attempts to recover the BIOS configuration. A recovery
diskette is required.