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unstable Core i7-970 at 4.4GHz

post #1 of 10
Thread Starter 
long time reader first post and fun stuff

I have a Core i7-970 Gulftown that runs stock at 3.2 and I've got it at 4.2ghz right now with the Corsair H50 cooler, the other night I was gonna try and take it up to 4.6 and my computer just started disrespecting me for a while when I was trying

My current values at 4.2 are:

multi- 20
bclk- 210
memory- 8
and my vcore is at 1.4

Initially I just wanted to ease into it and started with trying the 4.4 at

multi- 20
bclk- 220
didn't change memory
and vcore 1.4

and my comp decided to keep boot looping through blue screens, which was the same when I went back to the bios and changed my vcore to 1.45, which I really really don't think I needed to

I'm not 100% sure what is holding me back, whether its my temps or values, because my temps were fine, nothing above 45 at 4.2, I had figured 4.6 shouldn't hot enough for me to be triggering a fail safe shutdown

Help/suggestions appreciated
post #2 of 10
Even multipliers are bad overclockers. With the i7-970, you should have access to the 25x multiplier and thus you could lower your baseclock drastically. The very high base clock you are running now is causing you to need excessive qpi/VTT voltage and running your qpi speed pretty high. 220mhz is pretty much the breaking point for most Core i7's on baseclock.
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post #3 of 10
You need to raise your QPI/VTT voltage if you want to hit 220 BCLK. My suggestion is to leave the multiplier at Auto for 25x, then go for a BCLK of 176. This will give you 4.4GHz.

Here are my settings for 4.2GHz for reference:

CPU multi: 25x (auto)
BCLK: 168
CPU vcore: 1.35v
QPI/VTT: 1.25v (1.20v is stock)
Memory multiplier left at default 10x for 1680MHz.
QPI running at 3024MHz (18*168)
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post #4 of 10
One thing to note however is that Intel states that the Absolute Max for Vcore is 1.40v Source Page 23
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post #5 of 10
Thread Starter 
Thanks for the quick replies/advice

I'll certainly try a higher multiplier, I know my 25x wasn't active because I had turned off turbo boost in the bios at the advice of a friend who said it would my make 4.2 speed more stable, however I had no idea about the base clock issue, I'll give these ideas a shot and see what happens
post #6 of 10
Quote:
Originally Posted by fibbula;11830340 
the other night I was gonna try and take it up to 4.6 and my computer just started disrespecting me for a while when I was trying

Gotta show that computer who's boss tongue.gif Don't let it treat you that way.
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post #7 of 10
Quote:
Originally Posted by fibbula;11830502 
Thanks for the quick replies/advice

I'll certainly try a higher multiplier, I know my 25x wasn't active because I had turned off turbo boost in the bios at the advice of a friend who said it would my make 4.2 speed more stable, however I had no idea about the base clock issue, I'll give these ideas a shot and see what happens

Yeah, make sure you leave Turbo Boost disabled. It may screw with your overclock. Turbo is disabled on my machine but I can still use the 25x multiplier for whatever reason. Just check CPU-Z to make sure it's active.

I'm 90% sure that your settings for 4.4 were unstable because you needed more QPI/VTT voltage. The other possibility is that your RAM couldn't handle 1680MHz without a voltage boost and/or loosened timings. I recommend lowering your RAM multiplier down for now so that it runs at or below stock frequency. Once you've achieved stability with your CPU, bump your RAM back up and see if it's still stable.
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post #8 of 10
Quote:
Originally Posted by aznofazns;11830563 
The other possibility is that your RAM couldn't handle 1680MHz without a voltage boost and/or loosened timings. I recommend lowering your RAM multiplier down for now so that it runs at or below stock frequency. Once you've achieved stability with your CPU, bump your RAM back up and see if it's still stable.

I 100% agree with this.
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post #9 of 10
Thread Starter 
Well at the moment I'm still at 4.2ghz, however it is incredibly more stable than my initial settings thanks to the comments above

However at 4.4 I'm still getting bsod/boot loops

I tried the 25x multi (which I do have to have turbo boost enabled to use it, I checked this a few times with the cpuz), bclk at 176, I did raise the voltage on the qpi to 1.255, and vcore at 1.35

Initially I left the memory at 10, but went back and underclocked it as recommended, but I still couldn't get past the bsod/boot loops. I still haven't touched any other memory setting aside from the multiplier because I have to be honest, I know nothing about ram overclocking

I'm entirely curious as to what is going on now, so I'll keep playing with settings, but I still appreciate any advice anyone is willing to throw at me
post #10 of 10
I believe you need more vcore for 4.4GHz. I could only hit 4.4 with 1.376v (CPU-Z). Make sure you read the voltage in CPU-Z since it's usually a bit lower than what you set in the BIOS. I wouldn't recommend exceeding 1.40v.

If simply throwing more vcore at it doesn't help, raise a QPI/VTT a bit higher, maybe 1.275v. If 4.4 is still unstable with 1.40v vcore, 1.30v QPI/VTT, and underclocked RAM, you should probably just settle for 4.2.
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