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post #11 of 17
What do you have your dram voltage set at? I have mine at 1.65 and that seemed to help me the most. Plus, even though you have some great Mushkin ram, You should try looser timings...like 9-9-9-24-2n. My i7 920 only needs 1.27v. Other than the cpu, ram, and qpi/dram core at 1.3v everything is at stock voltage. I just set it all manually, then set the vcore, dram, and qpi/dram core a little higher. Once you have it stable, then you can tighten up the ram timings. I might be wrong, but I bet you'll never see 6-8-6-24...that's just my opinion.
    
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post #12 of 17
Quote:
Originally Posted by HaMMeR=GoM= View Post
Got these here, but I can't remember from who. Thet helped me.
BSOD codes for overclocking
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)
Finally I have help getting my 920 to 4.2ghz
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post #13 of 17
For me, I need 1.28v for 4.2ghz with Hyperthreading, and I need 1.232v for 4.2ghz without Hyperthreading. My IOH and VTT need to be the same to stay stable. So you take your vcore down a little bit and test from there.
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post #14 of 17
I do see the point of turning off HT for use, but as far as OCing, why diminish the specs of the chip and say you hit 4 or 5ghz? I'd say post your OC using HT, but hyperthreading has kind of been replaced by multi-core for most usage.
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post #15 of 17
Another handy little item for viewing BSODs.
http://www.nirsoft.net/utils/blue_screen_view.html
    
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post #16 of 17
Thread Starter 
Quote:
Originally Posted by HaMMeR=GoM= View Post
What do you have your dram voltage set at? I have mine at 1.65 and that seemed to help me the most. Plus, even though you have some great Mushkin ram, You should try looser timings...like 9-9-9-24-2n. My i7 920 only needs 1.27v. Other than the cpu, ram, and qpi/dram core at 1.3v everything is at stock voltage. I just set it all manually, then set the vcore, dram, and qpi/dram core a little higher. Once you have it stable, then you can tighten up the ram timings. I might be wrong, but I bet you'll never see 6-8-6-24...that's just my opinion.
I had to go to 1.375(%50 LLC) to get 4.2 with HT off last night. When I tried for the 4.2Ghz I started with my timings at 8-8-8-22. I will try with 9-9-9-24 tonight. I had the 6-8-6-24 when I had my 3.8GHz. My Dram voltage is at 1.65. I also have my CPU PLL at 1.8 and IOH/ICh at 1.20 and 1.50. I will try lowering somethings now but last night I kept getting 3b and 101 BSODs so I had to get to 1.34 vcore. I wish I only needed 1.27v to get to 4.2!

Quote:
Originally Posted by Dopamin3 View Post
For me, I need 1.28v for 4.2ghz with Hyperthreading, and I need 1.232v for 4.2ghz without Hyperthreading. My IOH and VTT need to be the same to stay stable. So you take your vcore down a little bit and test from there.
Like I posted above I kept getting the more vcore BSODs in ITB when I tried anything lower than 1.375v. I do not fully understand the LLC settings on my mobo yet so I need to read up on that. The options are Auto, 0%, 50% and 100%. I split the difference and used 50%. So at idle my vcore is 1.375 and under 100% load the vcore goes down to 1.29 or something near that which I just do not get. Why wouldnt I just set the vcore the number it goes to at load? Hmm. You must have a nice chip as well.

Quote:
Originally Posted by Frosty88 View Post
Go for the higher overclock with HT off. The majority of the games out there will run the same with HT off and as you said yourself, the PC is used for gaming 95% of the time.

Yes, it will lower benchmark scores but they're no fun to play anyway.
Well, here is the part that suprised me. I tested Metro 2033, Heaven and Crysis at 4.2GHz no HT vs 4.0Ghz with HT. In each of those tests the fps was higher with the 4.2Ghz no HT. Not by much but none of three benches I ran were lower without HT. I cannot run Vantage11 because of the SLI nvidia driver issue and I cannot even run regular vantage because installing Vantage 11 broke it. Unreal
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post #17 of 17
When I built a friends computer recently I ran benchmarks on i7 920 D0 with and w/o HT and the difference is negligible as far as performance goes but the voltage/temp difference IMHO outweighs the small performance gains. Running on Asus P6X58D Premium with High End air (Push-Pull).

Following settings were used for testing on my board but obviously setting on your board may vary:

4.2 Ghz HT Off Prime95 45 deg C Idle - 75 deg C MAX w/o any shift for hours
CPU Voltage Control....................[Manual]
CPU Ratio Setting......................[21.0]
CPU Voltage............................[1.28750]
CPU PLL Voltage........................[1.80]
QPI/DRAM Core Voltage..................[1.23125]
IOH Voltage............................[1.14]
IOH PCIE Voltage.......................[1.50]
ICH Voltage............................[1.20]
ICH PCIE Voltage.......................[1.50]
DRAM Bus Voltage.......................[1.64]
Load-Line Calibration..................[Enabled]
CPU Differential Amplitude.............[800mV]
CPU Clock Skew.........................[Delay 300ps]
IOH Clock Skew.........................[Auto]
C1E Support............................[Disabled]
Intel(r) SpeedStep(tm) Tech............[Disabled]

4.2Ghz HT ON Prime95 53 deg C idle - 84 deg C stable (too hot for my liking)
CPU Voltage Control....................[Manual]
CPU Ratio Setting......................[21.0]
CPU Voltage............................[1.31875]
CPU PLL Voltage........................[1.80]
QPI/DRAM Core Voltage..................[1.24375]
IOH Voltage............................[1.12]
IOH PCIE Voltage.......................[1.50]
ICH Voltage............................[1.20]
ICH PCIE Voltage.......................[1.50]
DRAM Bus Voltage.......................[1.64]
Load-Line Calibration..................[Enabled]
CPU Differential Amplitude.............[800mV]
CPU Clock Skew.........................[Delay 300ps]
IOH Clock Skew.........................[Auto]
C1E Support............................[Disabled]
Intel(r) SpeedStep(tm) Tech............[Disabled]

For every day use though, most people don't run at 100% CPU load all that often or for long amounts of time so maybe an CPU Voltage Offset might be the best compromise. Here is some setting my friend tested for me and was stable and had much lower idle and max temperatures (comparable to with H/T off).

CPU Voltage Control....................[Offset]
CPU Ratio Setting......................[21.0]
CPU Voltage............................[0.11875]
CPU PLL Voltage........................[1.80]
QPI/DRAM Core Voltage..................[1.26250]
IOH Voltage............................[1.10]
IOH PCIE Voltage.......................[1.50]
ICH Voltage............................[1.10]
ICH PCIE Voltage.......................[1.50]
DRAM Bus Voltage.......................[1.64]
Load-Line Calibration..................[Disabled]
CPU Differential Amplitude.............[700mv]
CPU Clock Skew.........................[Normal]
IOH Clock Skew.........................[Normal]
C1E Support............................[Enabled]
Intel(r) SpeedStep(tm) Tech............[Enabled]

Hope that helps!
Edited by 600538411 - 1/21/11 at 8:06pm
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