Jumper Information; Changing Jumper Settings - Intel SR4850HW4 - Server Platform - 0 MB RAM Product Manual

Pin Signal
7 +DB(1)
8 +DB(2)
9 +DB(3)
10 +DB(4)
11 +DB(5)
12 +DB(6)
13 +DB(7)
14 +P_CRCA
15 GND
16 DIFFSENS
17 TERMPWR

Jumper Information

This section provides general information on changing jumper settings as well as specific jumper
configuration for individual boards in the system. The jumper block shown by the letter "A" in
Figure 136 contains jumpers used to reset the password, write-protect and recover the BIOS, and
reset the CMOS.
When two power supplies are installed, the required power is divided between them. By using both
circuits, the server can draw more power than the threshold limit for a single power supply. The
hardware reduces the amount of power consumed if one of the power supplies fails. This ensures
the system consumes less power than the threshold from the single operating power supply. When a
failed power supply is replaced, the system is again able to share the power load and operate at full
performance.
If the J4G3 jumper is set incorrectly, the following may occur:
If the jumper is covering pins 1-2 on a 100/110VAC circuit, the server is allowed to consume
up to 1350 watts. This setting may cause a circuit breaker to trip.
If the jumper is covering pins 2-3 on a 115/120/127VAC circuit, the server power consumption
threshold is set to 1100 watts. The lower power threshold may be exceeded, limiting system
performance.

Changing Jumper Settings

To change a jumper setting:
1. Observe the safety and ESD precautions described in
2. Turn off all connected peripherals.
3. Power down the system and unplug both AC power cords.
4. Remove the top cover. For instructions, see
5. Move the jumper to pins specified for the required setting. For specific jumper block settings,
see Figure 136.
6. Reinstall any boards or components that you removed in order to access jumper blocks.
Intel® Server Platforms SR4850HW4 & SR4850HW4/M Product Guide
Pin Signal
24 +ACK
25 +RST
26 +MSG
27 +SEL
28 +C/D
29 +REQ
30 +I/O
31 +DB(8)
32 +DB(9)
33 +DB(10)
34 +DB(11)
"Removing the Top
Pin Signal
41 -DB(1) 58
42 -DB(2) 59
43 -DB(3) 60
44 -DB(4) 61
45 -DB(5) 62
46 -DB(6) 63
47 -DB(7) 64
48 +P_CRCA 65
49 GND 66
50 GND 67
51 TERMPWR 68
"Safety Information".
Cover".
Pin Signal
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
-DB(8)
-DB(9)
-DB(10)
-DB(11)
243