Vista Tutorial - Successful OC e8400 @ 4.00Ghz

Here are the settings i managed to get my E8400 to run stable at 4.00Ghz with ram at 890Ghz.

Sytem Clocks:
PCIEX16_2: 100 MHz
PCIEX16_1: 100 Mhz
SPP<->MCP: 250.0 Mhz

FSB & Memory Config
Clock Mode: Linked
Ratio: Sync Mode
FSB (QDR): 1780 (445)
Mem Mhz: 890.0

OC'ing
CPU Multiplier: 9.0
LDT Frequency: 5x
Intel SpeedStep: Disabled
Virt Technology: Disabled
Limited CPUID MaxVal: Disabled
CPU Thermal control: Disabled


Voltages set @
Vcore: 1.36250
CPU VTT: 1.40
Memory: 2.11
bro4: 1.20
1.2 HT: Auto
NB: 1.66
SB: 1.55
gtluref: 0.68x VTT

Nvidia GPU Ex Disabled

Could someone please let me know if my voltages are safe? specifically my NB and SB.

Running Prime95 for stability as of right now. Successfully shut down pc and booted up with these settings.

So, how'd I do on my first OC??

The vcore looks alright, but the N.B looks high. Do you have any active cooling on it? ie a fan on the NB heasink?

yes, but i managed to lower it a little anyhow

That's good mate

The general NB consensus with that chip seems to be that up to 1.4 is safe and anything over 1.5 is starting to ask for trouble

With my chip, any thing over 1.4 is usually a good way to kill it quickly

Gratz!

Very impressive.

Nice one.

Things to look at there would be the Vcore and the NB voltages. They are higher than i would be comfy with but check your temps using CPUID as long as the temps arent too high you should be OK.

thats not too shabby , nb and sb voltages are always a "suck it and see" thing you'll soon know if there set too high

see if your overclock is REALLY stable , run this for 8 passes maximum stress

IntelBurnTest v1.6 download from Guru3D.com

dont take your eyes off your temps!!!

oh and as the readme says "its at your own risk"

Only use the Intel Burn Test if you have at least 20C headroom over your load temp when running Prime95 or Orthos.

Intel® Core™2 Duo Desktop Processor E8400 - SLAPL

Intel says that for the E8400 the max safe temp is 72.4C. So in Prime95 or Orthos you only really want to be 50-55C. Anything over that and you may overheat your chip.

The Burn Test is very effective but uses the CPU so aggressively that once you start you can't stop it. Usually, everything freezes until the test is over. CoreTemp stops reporting temps after a second or two but my CPU is already 65+ by that time.

Have fun

Note: It may show up as a virus (on AVG it does) but this is a false alarm.