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i7 930 Overclock voltage question: 3.8 GHz vcore 1.2125, VTT 1.255?

post #1 of 4
Thread Starter 
Motherboard: Gigabyte GA-X58A-UD3R
BIOS: FE
Multiplier: 21
BClock: 181
VCore: 1.2125
VTT Voltage: 1.255
DRAM Voltage: 1.6
PLL: Auto
PLL: Level 1 Enhance

DDR 1600 G.Skill RAM running at 1440 9-9-9-24-74-1T (Auto)
HT is on and everything else is pretty much set at auto/defaults. Ialso have C1E and Speedstep enabled as I've verified stability at this level.

While testing for stability with Prime 95 or IBT, I also run Speedfan, Realtemp, Hardware Monitor, and CPU-Z to keep an eye on things.

With the above settings, I can run Prime 95 Blend or Small FFEs with no issue all day long with max temps on the hottest core of 70-72 (ambient 21.5 to 24.5). I can also run at least 5 loops of Intel Burn Text on maximum stress (haven't attempted more loops). Based upon a lot of the research I've done here, my vcore shouldn't need to be quite as high with a DO 930, but I guess that's life. Anyway, I'm trying to tune down the vcore as much as possible, so I tried 1.2000 and was able to run 4 or 5 loops of Intel Burn Test on max. However, Hardware Monitor failed after a couple loops, then I got a reboot after 4 or 5 loops. The BSOD was error 124 which everyone says is related to the VTT voltage.

The computer has rebooted from a bugcheck. The bugcheck was: 0x00000124 (0x0000000000000000, 0xfffffa80079e5028, 0x00000000f2000000, 0x0000000000020005). A full dump was not saved.

My question is why did this fail after a small adjustment in vcore with no change to VTT, but give me the 124 error? I had a similar situation a while back when I was pushing up to 3.8 with lower core voltage. Do you guys think that it will work with lower core voltage if I up the VTT? I've seen lots of guys say up to 1.35 VTT is fine.

I'm getting ready to test right now with everything as above, except I'm changing vcore to 1.20625. Will post results.

Also, I've seen lots of posts were people have all BIOS settings nicely organized. Is there an app for that, or are you guys just recording everything?

Thanks in advance. I've learned quite a bit already on this forum.
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Black Sunshine II
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post #2 of 4
0x101 = increase vcore
0x124 = increase/decrease vcore or QPI/VTT...have to test to see which one it is
0x0A = unstable RAM/IMC, increase QPI first, if that doesn't work increase vcore
0x1E = increase vcore
0x3B = increase vcore
0xD1 = QPI/VTT, increase/decrease as necessary
0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances
0x50 = RAM timings/Frequency or uncore multi unstable, increase RAM voltage or adjust QPI/VTT, or lower uncore if you're higher than 2x
0x116 = Low IOH (NB) voltage, GPU issue (most common when running multi-GPU/overclocking GPU)
0X109 = Not enough or too Much memory voltage

i need 1.45 qpi volts. i got 6 dims thos.... @ 4.0ghz i got 1.285 core volts. seems like u need to bump core volts up tho .
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Dyslexia
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by GfhTattoo View Post
0x101 = increase vcore
0x124 = increase/decrease vcore or QPI/VTT...have to test to see which one it is
0x0A = unstable RAM/IMC, increase QPI first, if that doesn't work increase vcore
0x1E = increase vcore
0x3B = increase vcore
0xD1 = QPI/VTT, increase/decrease as necessary
0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances
0x50 = RAM timings/Frequency or uncore multi unstable, increase RAM voltage or adjust QPI/VTT, or lower uncore if you're higher than 2x
0x116 = Low IOH (NB) voltage, GPU issue (most common when running multi-GPU/overclocking GPU)
0X109 = Not enough or too Much memory voltage

i need 1.45 qpi volts. i got 6 dims thos.... @ 4.0ghz i got 1.285 core volts. seems like u need to bump core volts up tho .
Thanks for the quick reference. If 124 applies to VTT and vcore, what I'm experiencing makes more sense. I guess, I need the 1.2125 vcore for 3.8. It's a shame that the DO stepping isn't what it used to be. Funny story, a friend of mine bought a 930 from the same place as me at the same time and he will never overclock his. However, he got a very good DO that runs at lower vcore than mine by default.
Black Sunshine II
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Black Sunshine II
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Wife's Rig
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120GB Intel 510 SSD Samsung 1TB WD LiteOn iHAS324-98 Y Cougage Tru Spirit (lapped) with Akasa Viper Pu... 
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post #4 of 4
I have the same MB n CPU, but RAM is different.
Here is my set up.
See if its helpful or not.

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