Intel SR1670HV Service Guide - Page 51

VGA Controller Setting 3-pin VGA_SW1, DDR3 Voltage Control Setting 4-pin LVDDR3_SEL1, LVDDR3_SEL2

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Jumpers, Connectors, and LEDs 5.1.2 VGA Controller Setting (3-pin VGA_SW1) This jumper allows you to enable or disable the onboard VGA controller. Set to pins 1-2 to activate the VGA feature. Figure 60. VGA Controller Setting 5.1.3 DDR3 Voltage Control Setting (4-pin LVDDR3_SEL1, LVDDR3_SEL2) The server board provides DDR3 voltage control jumper blocks for each CPU bank of memory. These jumper blocks change the voltage level supplied to the DIMM bank, and should only be changed when low voltage DDR3 DIMMs are installed. Set to pins 1-2 to select 1.5V BIOS control, pins 2-3 to select 1.2V Force or 3-4 to select 1.35V Force. CAUTION Moving these jumpers from their default position may cause irreparable damage.The use of LV (low voltage) DDR3 DIMMs on this server board is intended for future use only, and will only be supported after Intel has validated their functionality. This document will be updated with full usage information once validation is complete and tested LV DDR3 DIMMs are added to the Tested Memory List for this server board. 36 Intel® Server System SR1670HV Service Guide

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Jumpers, Connectors, and LEDs
36
Intel
®
Server System SR1670HV Service Guide
5.1.2
VGA Controller Setting (3-pin VGA_SW1)
This jumper allows you to enable or disable the onboard VGA controller. Set to pins 1–2 to
activate the VGA feature.
Figure 60. VGA Controller Setting
5.1.3
DDR3 Voltage Control Setting (4-pin LVDDR3_SEL1,
LVDDR3_SEL2)
The server board provides DDR3 voltage control jumper blocks for each CPU bank of
memory. These jumper blocks change the voltage level supplied to the DIMM bank, and
should only be changed when low voltage DDR3 DIMMs are installed.
Set to pins 1–2 to select 1.5V BIOS control, pins 2–3 to select 1.2V Force or 3–4 to select
1.35V Force.
CAUTION
Moving these jumpers from their default position may cause
irreparable damage.The use of LV (low voltage) DDR3 DIMMs on this
server board is intended for future use only, and will only be
supported after Intel has validated their functionality. This document
will be updated with full usage information once validation is complete
and tested LV DDR3 DIMMs are added to the Tested Memory List for
this server board.