Help me get 4.2Ghz stable?

V_R

V_R

V_R

Soldato
Joined
17 Jan 2007
Posts
9,997
Location
UK
Hi all,

First up, i'm still a bit of a noob regarding Overclocking. So forgive me if this seems a bit basic. :o

So i've had one of the OC'ed bundles from OcUK since October '09, Spec in sig.

Been running at 4Ghz perfectly stable since then. But now i'd like to try and hit 4.2Ghz if i can....

I tried upping the BLCK to 200 and it ran fine for a while then randomly locked up on the desktop.

I upped the Vcore a notch or two it ran the heaven benchmark a few times and locked up again. It also BSOD'ed with a Machine_Check_exception error too.

At that point i decided to put it back and leave it.

Could it be i need to adjust the ram timings or something?

Heres what CPU Z says at the mo....

kb6gk.png



Any help would be great. :)

Thanks.
 
Do you have load line calibration on? If not, try turning that on.

If that still doesn't work, turn off C1E if you haven't already.

If that doesn't work either, turn off C-States altogether.
 
you might the jump from 4 to 4.2 a big vcore hole mate, my old i7 need 1.28 for 4 and 1.38 for 4.2. keep it under 1.4 to try it keep in mind safe temps, dont advise it for 24/7 though
 
Load line Calibration is on.

Can you elaborate on what you mean by 'C-States' ?

Thanks
 
Ah yes, sorry was being a bit think when i asked tat yesterday... :o

Whats the max vcore and temps i should be looking at for an i7 920 @4.2Ghz?
 
I would say hitting 90 C in IBT or Prime is bad. Keep it below that. In terms of voltages, don't go above 1.4 V. You'll almost certainly be temperature limited before this though.

Most chips hit a wall at either 3.8 GHz or 4 GHz where an additional increase requires a relatively large VCore jump.
 
Cooling would be the big thing with trying to get to 4.2GHz

Some CPU's will run cool as can be at 4GHz but bump up the voltage to get them stable any higher and they run very very hot. It is just the luck of the draw. BUT if your cooling is up to the task then you should manage.

Good idea is to have a look at what your temps are doing at the current settings running some kind of CPU stress test and then compare with the 4.2GHz settings.

As has been said it is better to manage your temps because the increase of 200MHz is really not worth damaging your components.

But heck it is fun to try:D So go and see what you can get out of your system safely.
 
Have you determined what the maximum bus speed you motherboard will run at is, some boards won’t hit a 200 bclk. Try incrementally upping the blck from 190 whilst keeping the multi on the CPU low (to keep the overall speed down) until you either hit 200 or it won’t go any higher
 
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