Help Stabilizing above 4ghz (i7 920 D0 + P6T)

[infected_]

hi guys. just did a upgrade to my pc 4 days ago. Here are my specs now:

i7 920 D0 (batch 3851A220, runs default speed (stable) at 1.0v in bios)
Asus P6T bios 0603
Gskill 3x1GB 1333mhz NQ (temporary, OCZ "Animal" 3x2GB coming this week)
Asus GTX295
Silverstone OP1000W
Noctua NH-U12P (sckt 775, push-pull)
Antec 1200 (7x120,1x200)
2x WD3200AAKS (Raid 0) + F1 1TB

Ok. As soon i putted vista up and running, i was starting ocing the i7, but thing are a little different from the core 2 i was used to... didn't seem like an obstacle, so i started reading about ocing the i7's... this last weekend i started playing with it, ended up with this for now:

idle
http://img15.imageshack.us/img15/8232/i74ghzidle.jpg

loaded
http://img10.imageshack.us/img10/8739/i74ghzloaded.jpg

10x linx ok
http://img132.imageshack.us/img132/6374/i74ghzlinx.jpg

The settings i used:

AI Overclock tuner: Manual
CPU Ratio Setting: 20
Intel (R) SpeedStep (TM) Tech: Disabled
Intel (R) Turbo Mode Tech: Disabled
BLCK Frequency: 200
PCIE Frequency: 100
DRAM Frequency: 1200
UCLK Frequency: Auto
QPI Link Data Rate: Auto

DRAM Timing Control: Auto

CPU Voltage: 1.30000
CPU PLL Voltage: 1.84
QPI/DRAM Core Voltage: 1.23750
IOH Voltage: 1.10
IOH PCIE Voltage: 1.50
ICH Voltage: 1.10
ICH PCIE Voltage: 1.50
DRAM Bus Voltage: 1.50
DRAM DATA REF Voltage on CHA: Auto
DRAM DATA REF Voltage on CHA: Auto
DRAM DATA REF Voltage on CHB: Auto
DRAM DATA REF Voltage on CHB: Auto
DRAM DATA REF Voltage on CHC: Auto
DRAM DATA REF Voltage on CHC: Auto

Load Line Calibration: Enabled
CPU Differential Amplitude: Auto
CPU Clock Skew: Auto
CPU Spread Spectrum: Disabled
IOH Clock Skew : Auto
PCIE Spread Spectrum: Disabled

Advanced CPU Settings

CPU Ratio Setting: 20
C1E Suppport: Disabled
Hardware Prefetcher: Enabled
Adjacent Cache Line Prefetch: Enabled
Intel® Virtualization Tech: Disabled
CPU TM Function: Enabled
Execute Disable Bit: Disabled
Intel (R) HT Techology: Enabled
Active Processor Cores: All

Well... I think the vcore is a little high, and i cant get past 200*20... Been messing with vcore and qpi voltage but no luck...

Anyone with similar system that can help? I will appreciate all tips/hints/pointers you guys can help me since this is my first time with a i7 system and i only know a few basics things about them...

Thanks,

infected_

Ps: The ambient temperature when the screens were, was about 28ºC, but in the room my pc is, is even hotter...

[rpg711]

I saw this awesome voltage guide on the EVGA forums.
http://www.2shared.com/file/6073621/a9115745/x58_i7_Voltage_Guide.html

I didn't make it... all I did was copy/paste the data in case the post got erased in any way... posted a download link of the word document that preserves formatting.

[infected_]

thanks, ill give a it a read..

[infected_]

Ok, guys, got new results... been able to get it stable (triple-checked) at 190*21, here are the sttings i used:

vcore 1.25000
qpiv 1.22500
cpu pll 1.86
ioh 1.1
ich 1.2
cpu amp 800mv

but 200*21 its getting really hard to stabilize... :(

got it stable once at that speed with the following:

vcore 1.33125
qpiv 1.31875
cpu pll 1.86
ioh 1.14
ich 1.20
cpu amp 800mv
cpu skew 300ps
ioh skew 300ps

but then i rebooted, run the test again and it didnt passed :confused:

can someone help me, please?

thanks,

infected_

[Paxi]

try upping vcore a bit, i need about ~1,38V to get 4,2 HT stable