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Old March 15, 2011, 05:30 PM
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Default New build OCing crashes

Hey guys,

I recently purchased a new rig consisting of a

i7 970
12gb 1600 ddr3 corsair dominator ram
intel 510 SSD
2tb WD storage drive
EVGA 560ti
Corsair hx850
Corsair H70
Sabertooth x58

The pc is giving me a blue screen as seen in the attachment below.

The overclock isnt anything extreme, and temps are within reason.
The latest crash the temps were at 36C.

200bclk
1.325 vcore
1600mhz ram
2400 qpi
4.2ghz cpu o/c.


I would love some input regarding what the issue could be.
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Old March 15, 2011, 06:42 PM
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go back to defaults, prime/linx and 3dmark loop it.

if no issues, at all? then start clocking that bus up by 5-10mhz and see what gives.
watch your qpi speed, drop it down a notch, increase vtt to 1.3 and continue. i personally hate
that qpi bastard. sometimes you really have to get it right or else your whole other things that are
correct are for naught.
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Old March 15, 2011, 07:19 PM
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Well there are three possibilities to what that stop code is refering to, unfortunately i cannot remember which, they however are; Vcore too low, VTT too low, RAM voltage too low.
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Old March 15, 2011, 07:47 PM
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Hey thanks for the replies.

The Vcore was @ 1.325
the ram voltage @ 1.65


and the VTT......i didn't set it, I left it at auto.

Guess that's the problem?
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Old March 15, 2011, 07:50 PM
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coud be. start with 1.3, dont go over 1.4
either way, if you need more than 1.35 on the vtt to continue, could be a sign to take it easy :)
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Old March 15, 2011, 08:01 PM
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I dont see a VTT setting on my bios.

Does VTT= qpi/dram voltage core?

If thats the case then its @ 1.375


And me thinks the Ram wasn't set to 1.65 volts at the time of oc, after looking at the oc profile I saved.
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Old March 16, 2011, 04:17 AM
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I seem to have fixed the problem.

The I had forgotten to set up the ram voltage.

I have another question though.

with a 200bclk the qpi link is at around 7.2GT/s, is that too high?

A friend of mine suggested I bring that down to 4.8GT/s. I currently have it at 6.91 GT/s because i lowered the bclk to 192 or so for a 4.0ghz overclock.

Any input on that would be great.

Thanks.
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Old March 16, 2011, 04:28 AM
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Depends on the board, but 7.2 is definitely on the high side. Usually it's best to just keep it low, turning down the qpi multiplier barely affects performance in any way what so ever.
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Old March 16, 2011, 04:31 AM
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I currently have it @ 6.91GT/s, is that ok?

I think default it is at 6.39GT/s, thats what it shows in the Intel Extreme Tuning Utility.
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Old March 16, 2011, 05:18 AM
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Quote:
Originally Posted by kpamir View Post
I currently have it @ 6.91GT/s, is that ok?

I think default it is at 6.39GT/s, thats what it shows in the Intel Extreme Tuning Utility.
There is no standard "ok" for anything when it comes to overclocking. Every individual processor and/or motherboard are different. It's all about tuning your processor/motherboard to get the amount performance you want.

What I was trying to hint at before is you should just turn down the qpi multiplier so you don't have to worry about high qpi clocks causing system instability.

4.2ghz, although not a very high overclock, is not a modest overclock for any i7. If you want to reach that speed I would recommend you look through a guide to overclocking and go about your overclock the simple and effective way.

This one's a little old, but it's relevant: Guide to Overclocking the Core I7 920 or 930 to 4.0ghz - Overclock.net - Overclocking.net
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