Changing Jumper Settings - Intel SR6850HW4 - Server Platform - 0 MB RAM Product Manual

The power consumption threshold is most likely to be exceeded when all of the following
conditions are met:
The server is connected to a low-line power circuit
The server has a single power supply installed
The server is fully configured with four processors, 16 x4 GB DIMMs, ten hard disk drives,
and all PCI slots are filled
The server is running at maximum performance
If the power consumption threshold is crossed, the hardware throttles the processors to reduce the
power consumption to below the set threshold. The processor performance can be returned to the
full performance level by inserting a second power supply or by power cycling the server.
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 precautions, warnings, and cautions described in
2. Turn off all peripheral devices connected to the system.
3. Power down the system and unplug both AC power cords.
4. Remove the top cover. For instructions, see "Removing the Top Cover".
5. Locate the configuration jumper blocks on the board.
6. Move the jumper to the pins specified for the required setting. For specific jumper block
settings, see Figure 127.
7. Reinstall any boards or components that you removed to access the jumper blocks.
240 Intel® Server Platforms SR6850HW4 and SR6850HW4/M Product Guide
"Safety Information".