Unstable overclock?

[qazwsxokmijn]

So I recently overclocked my i7 920 to 4GHz, with all day to day use and gaming stable with no problems. However after some hours overnight doing blend tests with Prime95 the computer blue screens with BCCode 124, which I read up is usually VTT and/or RAM related. This has happened for three nights. Well my voltage list is (on Asus P6T):

CPU vcore: 1.32, LLC enabled
Supertalent 6GB 2000 @ 1600MHz 9-9-9-28 1.64v
QPI/DRAM: 1.2625v
IOH voltage: 1.14v

Anybody got any ideas what could be causing this 124 error?

Oh, and forgot to mention it passes 10 rounds of Intelburntest.

 

[BD231]

I'd sit happy and find out what else might need voltage, 3D/endconding stable is a very good start.

 

[qazwsxokmijn]

I don't do encoding/graphics stuff....but I've decided to stick to 3.8GHz as it runs cooler and with only 1.256 vcore.

 

[SanDiegoPC]

I don't do encoding/graphics stuff....but I've decided to stick to 3.8GHz as it runs cooler and with only 1.256 vcore.

Me too. I got to 4.0 but backed off. And I'm perfectly happy with a fast & stable machine.

 

[qazwsxokmijn]

It seems like a very different overclock from 3.8GHz to 4GHz. Sure the difference is only 200MHz but to get to 4GHz is so much harder than to get 3.8GHz, at least in my case.

It's running Prime95 for 30 minutes so far on 1.232v! Passed 5 rounds of IBR previously.

 

[n7]

What multi + BCLK?

20x200?

Try a higher multi + lower BCLK when in doubt, & also lower the RAM multi so RAM is underclocked to ensure it's not memory-related.

You may need more VTT, yup.

But if you try what i mentioned above, you isolate the issues, & should be able to determine what's causing the instability.

Also, you are using the max RAM stress with IBT/LinX, right?
Don't ever waste time running the "Standard" 1024 MB crap; that's a waste of a test.
Max out the RAM or don't bother.

Same thing for P95.
Set custom RAM to a higher amount, as default barely uses any RAM.

Where i typed "MOAR" you'll wanna up that to say, 4000 MB for your system.
I use 6000+ MB for my 8 GB.

 

[qazwsxokmijn]

What multi + BCLK?

20x200?

Try a higher multi + lower BCLK when in doubt, & also lower the RAM multi so RAM is underclocked to ensure it's not memory-related.

You may need more VTT, yup.

But if you try what i mentioned above, you isolate the issues, & should be able to determine what's causing the instability.

Also, you are using the max RAM stress with IBT/LinX, right?
Don't ever waste time running the "Standard" 1024 MB crap; that's a waste of a test.
Max out the RAM or don't bother.

Same thing for P95.
Set custom RAM to a higher amount, as default barely uses any RAM.

Where i typed "MOAR" you'll wanna up that to say, 4000 MB for your system.
I use 6000+ MB for my 8 GB.

Hey n7. Yep, I used all your tips previously. Tried lower multi/higher BCLK etc, upped voltages here and there, and still no luck. When using P95 and IBR I always made sure memory is utilised as much as possible. But what the heck, with 3.8GHz and 1523MHz on RAM I need so much less voltages for the QPI, vcore and DRAM it's not even funny. I think at this point a 200MHz increase is not worth all the extra heat and possibly killer voltages settings at 4GHz may bring.

 

[imaxcpu]

Deleted

Sorry, meant to start a new post.