Help get my voltage down (SB-E 3820)

Soldato
Joined
8 Mar 2007
Posts
10,938
Hi all,

I currently have my PC (see my sig for complete details) running stable at 4.75GHz @ 1.42v on my i7 3820; but I have other 3820 owners telling me my voltage is too high for that setting. Trouble is, when I try and lower it my rig just fails any stress testing, giving me a BSOD 124 (not 101 which you'd expect for under voltage though) at say 1.39v.

Here are all BIOS settings listed, the ones I have changed are in bold in the others are the stock settings.

Ai Overclock Tuner - Manual
BCLK Frequency - 125
CPU Strap - 125MHz
ClockGenFull Reset - Enabled
Turbo Ratio - By All Cores
By All Cores (Can Adjust in OS) - 38
CPU Clock Gen Filter - Enabled
Memory Frequency - DDR3-2000MHz

EPU Power Saving Mode - Disabled
DRAM CAS# Latency - 9
DRAM RAS# to CAS# Delay - 11
DRAM RAS# PRE Time - 10
DRAM RAS# ACT Time - 28
DRAM COMMAND MODE - 2

DRAM RAS# to RAS# Delay - Auto
DRAM REF Cycle Time - Auto
DRAM WRITE Recovery Time - Auto
DRAM READ to PRE Time - Auto
DRAM FOUR ACT WIN Time - Auto
DRAM WRITE to READ Delay - Auto
DRAM Write Latency - Auto
tRRDR - Auto
tRRDD - Auto
tWWDR - Auto
tWWDD - Auto
ttRWDR - Auto
tRWDD - Auto
tWRDR - Auto
tRWDD - Auto
tRWSR - Auto
tCCD - Auto
DRAM RTL (CHA D0 R0) - Auto
DRAM IOL (CHA D0 R0) - Auto
DRAM RTL (CHA D0 R1) - Auto
DRAM IOL (CHA D0 R1) - Auto
DRAM RTL (CHA D1 R0) - Auto
DRAM IOL (CHA D1 R0) - Auto
DRAM RTL (CHA D1 R1) - Auto
DRAM IOL (CHA D1 R1) - Auto
DRAM RTL (CHB D0 R0) - Auto
DRAM IOL (CHB D0 R0) - Auto
DRAM RTL (CHB D0 R1) - Auto
DRAM IOL (CHB D0 R1) - Auto
DRAM RTL (CHB D1 R0) - Auto
DRAM IOL (CHB D1 R0) - Auto
DRAM RTL (CHB D1 R1) - Auto
DRAM IOL (CHB D1 R1) - Auto
DRAM RTL (CHC D0 R0) - Auto
DRAM IOL (CHC D0 R0) - Auto
DRAM RTL (CHC D0 R1) - Auto
DRAM IOL (CHC D0 R1) - Auto
DRAM RTL (CHC D1 R0) - Auto
DRAM IOL (CHC D1 R0) - Auto
DRAM RTL (CHC D1 R1) - Auto
DRAM IOL (CHC D1 R1) - Auto
DRAM RTL (CHD D0 R0) - Auto
DRAM IOL (CHD D0 R0) - Auto
DRAM RTL (CHD D0 R1) - Auto
DRAM IOL (CHD D0 R1) - Auto
DRAM RTL (CHD D1 R0) - Auto
DRAM IOL (CHD D1 R0) - Auto
DRAM RTL (CHD D1 R1) - Auto
DRAM IOL (CHD D1 R1) - Auto
DRAM CLK Period - Auto
Enhanced Training (CHA) - Auto
Enhanced Training (CHB) - Auto
Enhanced Training (CHC) - Auto
Enhanced Training (CHD) - Auto
MCH Duty Sense (CHA) - Auto
MCH Duty Sense (CHB) - Auto
MCH Duty Sense (CHC) - Auto
MCH Duty Sense (CHD) - Auto
Receiver Slew - Auto
Transmitter Slew - Auto
MCH Recheck - Auto
CPU Load-line Calibration - High
CPU Current Capability - 130%

CPU VCORE Boot Up Voltage - Auto
VCCSA Load-line Calibration - Auto
VCCSA Current Capability - 1
CPU VCCSA Boot Up Voltage - Auto
CPU Voltage Frequency - Auto
CPU Spread Spectrum - Disabled
CPU Power Duty Control - T.Probe
CPU Power Phase Control - Auto
DRAM-AB Current Capabilty - 1
DRAM-AB Voltage Frequency - Auto
DRAM-AB Power Phase Control - Optimized
DRAM-CD Current CapCDilty - 1
DRAM-CD Voltage Frequency - Auto
DRAM-CD Power Phase Control - Optimized
CPU Ratio - Auto
Enhanced Intel SpeedStep Technology - Disabled
Turbo Mode - Enabled
Long Duration Power Limit - Auto
Long Duration Maintained - Auto
Short Duration Power Limit - Auto
Additional Turbo Voltage - Auto
CPU Core Current Limit - Auto
CPU VCORE Voltage - Manual Mode
CPU VCORE Manual Voltage - 1.42

CPU VCCSA Voltage - Offset Mode
Offset Mode Sign - +
CPU VCCSA Offset Voltage - Auto
DRAM Voltage (CHA, CHB) - 1.65
DRAM Voltage (CHA, CHB) - 1.65

CPU PLL Voltage - Auto
VTTCPU Voltage - Auto
PCH 1.1v Voltage - Auto
PCH 1.1v Voltage - Auto
VTTDDR Volatge (CHA, CHB) - Auto
VTTDDR Volatge (CHC, CHD) - Auto
DRAM CTRL REF Voltage on CHA - Auto
DRAM DATA REF Voltage on CHA - Auto
DRAM CTRL REF Voltage on CHB - Auto
DRAM DATA REF Voltage on CHB - Auto
DRAM CTRL REF Voltage on CHC - Auto
DRAM DATA REF Voltage on CHC - Auto
DRAM CTRL REF Voltage on CHD - Auto
DRAM DATA REF Voltage on CHD - Auto
DRAM Read REF Voltage on CHA - Auto
DRAM Read REF Voltage on CHB - Auto
DRAM Read REF Voltage on CHC - Auto
DRAM Read REF Voltage on CHD - Auto
CPU Spread Spectrum - Disabled
PCIE Spread Spectrum - Disabled

Intel Adaptive Thermal Monitor - Enabled
Hyper-Threading - Enabled
Active Processor Cores - All
Limit CPUID Maximum - Disabled
Execute Disable Bit - Enabled
Intel Virtualization Technology - Enabled
CPU Ratio - Auto
Enhanced Intel SpeedStep Technology - Disabled
Turbo Mode - Enabled
CPU C1E Report - Enabled
CPU C3 Report - Disabled
CPU C6 Report - Disabled
CPU C7 Report - Disabled

Intel® VT-d - Disabled
PCIEX16_1 Link Speed - GEN3
PCIEX16_2 Link Speed - GEN3
PCIEX16_3 Link Speed - GEN3
High Precision Timer - Enabled
SATA Mode - RAID Mode
S.M.A.R.T. Status Check - Enabled
Hot Plug - Enabled
Hot Plug - Enabled
Hot Plug - Enabled
Hot Plug - Enabled
Hot Plug - Enabled
Hot Plug - Enabled

Legacy USB Support - Enabled
Legacy USB3.0 Support - Enabled
ECHI Hand-off - Disabled
Azalia HD Audio - Enabled
Front Panel Type - HD
SPDIF Out Type - SPDIF
Intel LAN Controller - Enabled
Intel LAN PXE OPROM - Disabled
VIA 1394 Controller - Enabled
PCI Express 1.1 Slot Configuration [SATA6G_E1/E2] - AUTO
Asmedia USB 3.0 Controller - Enabled
Marvell Storage Controller - Enabled
Marvell Storage OPROM - Enabled
ASM1061 Storage Controller - AHCI Mode
ASM1061 Storage OPROM - Enabled
Serial Port - Enabled
Change Settings - IO=3F8h; IRQ=4
Restore AC Power Loss - Power Off
Power On By Keyboard - Disabled
Power On By Mouse - Disabled
Power On By PCIE/PCI - Disabled
Power On By Ring - Disabled
Power On By RTC - Disabled
EnP Ready - Disabled


Any help would be muchly appreciated, thanks in advance....
 
Caporegime
Joined
26 Aug 2003
Posts
37,247
Location
Cheshire
You don't appear to have touched on a number of settings, try mulling mine over.

AI Tuner Settings

AI OC Tuner:
Manual
BCLK: 125
CPU Strap: 125
CPU Clock Gen Filter: Enabled
CPU Core Voltage: 1.410v
Multiplier (All Cores): 40


Digi+ Settings

Load Line Calibration: High
CPU Current Capability: 130%
VCCSA LLC: Regular
VCCSA Current Capability: 120%

CPU Voltage Frequency: Auto
Spread Spectrum: Disabled

CPU Power Duty: Extreme
CPU Power Phase: Extreme

DRAM Frequency: Optimized
DRAM Current Capability: 120%
 
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