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Anything wrong with my i7 930 overclock?

post #1 of 11
Thread Starter 
I didn't expect it to be so easy...I must be doing something wrong.

Specs:
i7 930 d0 stepping
Asus P6X58D-E mobo
4gb G.skill 1600mhz ram
CM Hyper 212+ (single fan)
CM HAF 922 case

Right now I'm running 3.8GHz and using Prime95 on blend. It is stable so far (20 mins) with temps of 40/68 idle/load.

BIOS settings:
Ai Overclock Tuner.....................[Manual]
CPU Ratio Setting......................[21.0]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Xtreme Phase Full Power Mode...........[Enabled]
BCLK Frequency.........................[181]
PCIE Frequency.........................[100]
DRAM Frequency.........................[DDR3-1451MHz]
UCLK Frequency.........................[2903MHz]
QPI Link Data Rate.....................[Auto]

CPU Voltage Control....................[Manual]
CPU Voltage............................[1.20000]
CPU PLL Voltage........................[1.80]
QPI/DRAM Core Voltage..................[1.20000]
IOH Voltage............................[1.12]
IOH PCIE Voltage.......................[1.50]
ICH Voltage............................[1.20]
ICH PCIE Voltage.......................[1.50]
DRAM Bus Voltage.......................[Auto]
DRAM DATA REF Voltage on CHA...........[Auto]
DRAM CTRL REF Voltage on CHA...........[Auto]
DRAM DATA REF Voltage on CHB...........[Auto]
DRAM CTRL REF Voltage on CHB...........[Auto]
DRAM DATA REF Voltage on CHC...........[Auto]
DRAM CTRL REF Voltage on CHC...........[Auto]

Load-Line Calibration..................[Enabled]
CPU Differential Amplitude.............[800mV]
CPU Clock Skew.........................[Auto]
CPU Spread Spectrum....................[Disabled]
IOH Clock Skew.........................[Auto]
PCIE Spread Spectrum...................[Disabled]

C1E Support............................[Disabled]
Hardware Prefetcher....................[Enabled]
Adjacent Cache Line Prefetch...........[Enabled]
Intel(r) Virtualization Tech...........[Disabled]
CPU TM Function........................[Enabled]
Execute Disable Bit....................[Enabled]
Intel(r) HT Technology.................[Disabled]
Active Processor Cores.................[All]
A20M...................................[Disabled]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Intel(r) C-STATE Tech..................[Disabled]

This is my first overclock, so I don't know much about what each setting should or shouldn't be.
I followed the low-voltage overclocking template here with minor changes.

Is there anything I should change before going for 4GHz+?
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post #2 of 11
Looks fine to me. Yeah, i7's are pretty awesome for overclocking. To hit 4.0 you'll probably only have to bump another ~0.02-0.04 vcore and maybe minor QPI increases. I keep mine at 3.8 because I can fold at full load and hover at 65-69C
Rosemari
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post #3 of 11
Thread Starter 
Thanks.

Right now I'm trying to get a stable 4GHz, had to play around with it, but it seems to be coming together. I'm at 1.258v Vcore in BIOS, shows 1.24 on CPU-Z. 1.22v QPI/DRAM. Temps are at 45/75 now, Prime95 has been running for 15 minutes with no problems.

I'll see how it goes from here. Is there anything else I should increase besides Vcore and QPI/DRAM voltage?
Edit: BSOD'd on me at the 20 minute mark. increased Vcore in BIOS to 1.26, hopefully it will be stable here.
Edited by FuriousNoodle - 4/10/11 at 7:28pm
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post #4 of 11
Thread Starter 
Well...4GHz failed on 1.26, I'll bump it up again tomorrow, but right now I'm stable at 3.8GHz at 1.17 Vcore. It seems a bit strange that it takes almost 0.1v of an increase to get to 4GHz.

One thing I noticed was that the BSOD of the 1.26 Vcore test said "Driver IRQL not less or equal", which upon googling told me that it meant either the memory screwed up or the video card. The ram is running below the stock 1600MHz on the overclock.

Does this mean I should bump up the voltage on the RAM? It's rated at 1.5v so is it even safe to up the voltage? What about the QPI, should that be raised? There are so many voltage readings that I can change, so I don't know which one to adjust now.

Thanks in advance!
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post #5 of 11
Hmmm. I got to 4 just on vcore and QPI, and my memory was running at 1.5v the whole time. My gut tells me you shouldn't have to mess with your ram voltages, but I could be wrong.

I'd say anything under below 1.3v at 4 GHz isn't unheard of; every chip is different. Let's see if someone else on here has some info on that IRQL bsod before proceeding - never got one of those.
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post #6 of 11
Different CPUs need different voltages.

I've got the same CPU as you though I forget my exact vcore in BIOS but CPU-Z is showing 1.248 with HT on (I believe it is 1.26x in BIOS). Your temps are about the same as mine with push/pull H50 though you've got a better airflow case.
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Goliath
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post #7 of 11
Thread Starter 
Ok, it looks like I've got a stable 4GHz working. Temps are at 45/78, Prime95 has been running on blend for 3.5 hours with no problem. I'll try LinX on max memory tomorrow.

I'd like you all to take a look at the settings I'm using again just to make sure everything's OK. I still haven't touched the PLL, QPI rate, and IOH voltage.

BIOS settings:
Ai Overclock Tuner.....................[Manual]
CPU Ratio Setting......................[21.0]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Xtreme Phase Full Power Mode...........[Enabled]
BCLK Frequency.........................[191]
PCIE Frequency.........................[100]
DRAM Frequency.........................[DDR3-1531MHz]
UCLK Frequency.........................[3063MHz]
QPI Link Data Rate.....................[Auto]

CPU Voltage Control....................[Manual]
CPU Voltage............................[1.28250]
CPU PLL Voltage........................[1.80]
QPI/DRAM Core Voltage..................[1.23250]
IOH Voltage............................[1.12]
IOH PCIE Voltage.......................[1.50]
ICH Voltage............................[1.20]
ICH PCIE Voltage.......................[1.50]
DRAM Bus Voltage.......................[Auto]
DRAM DATA REF Voltage on CHA...........[Auto]
DRAM CTRL REF Voltage on CHA...........[Auto]
DRAM DATA REF Voltage on CHB...........[Auto]
DRAM CTRL REF Voltage on CHB...........[Auto]
DRAM DATA REF Voltage on CHC...........[Auto]
DRAM CTRL REF Voltage on CHC...........[Auto]

Load-Line Calibration..................[Enabled]
CPU Differential Amplitude.............[800mV]
CPU Clock Skew.........................[Auto]
CPU Spread Spectrum....................[Disabled]
IOH Clock Skew.........................[Auto]
PCIE Spread Spectrum...................[Disabled]

C1E Support............................[Disabled]
Hardware Prefetcher....................[Enabled]
Adjacent Cache Line Prefetch...........[Enabled]
Intel(r) Virtualization Tech...........[Disabled]
CPU TM Function........................[Enabled]
Execute Disable Bit....................[Enabled]
Intel(r) HT Technology.................[Disabled]
Active Processor Cores.................[All]
A20M...................................[Disabled]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Intel(r) C-STATE Tech..................[Disabled]

One more question, I got a BSOD with a Vcore of 1.275, one notch below what it's at right now. Should I bump up the Vcore one notch now that it seems to be stable just to make sure?

Thanks for all the help!
Edited by FuriousNoodle - 4/11/11 at 9:22pm
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post #8 of 11
When I was trying to find a stable OC, I ran P95 blend for extended runs. I had a few runs where it was stable at 3 hours and BSOD a little after. I remember one was even at 6 hours, BSOD.

I'm running the OC that ran 24 hours stable and temps were good. Some don't feel it is necessary and some feel that if it makes it past X hours, it will be good under real conditions.

What is CPU-Z showing your voltage at? Max temp is at 78 in P95?

And no, no need to bump the voltage up again. Let this set run and see how stable it is. If it passes here but failed at one voltage notch below, this is your stable OC assuming everything else was the same.
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by InvalidUserID View Post
When I was trying to find a stable OC, I ran P95 blend for extended runs. I had a few runs where it was stable at 3 hours and BSOD a little after. I remember one was even at 6 hours, BSOD.

I'm running the OC that ran 24 hours stable and temps were good. Some don't feel it is necessary and some feel that if it makes it past X hours, it will be good under real conditions.

What is CPU-Z showing your voltage at? Max temp is at 78 in P95?

And no, no need to bump the voltage up again. Let this set run and see how stable it is. If it passes here but failed at one voltage notch below, this is your stable OC assuming everything else was the same.
Thanks for the advice! I will do a 24hr run to make sure it is 100% stable.

In BIOS the Vcore is set at 1.2825, but in CPU-Z it shows 1.272 under load. The max temp is 78C on the hottest core while running P95, over a span of 4.5 hours. Ambient is 26C.

Hopefully tomorrow morning I won't wake up to a BSOD.
I'll report back tomorrow if it passed the 24hr mark or not.

Thanks!
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post #10 of 11
Thread Starter 
Well, 1.2825 failed me somewhere between the 6hr mark and 12 hr mark. The BSOD was the IRQL driver thing again, code was either 1d or d1, can't remember which one.

Bumped up the Vcore and QPI one notch again and as of now P95 has been running on blend for 10 hours with no problems. Hoping 1.2875 Vcore is the magic number.

One thing I did notice though was that CPU-Z shows the same Vcore (1.272v under load) when the BIOS was set at 1.2825 and at its current setting of 1.2875, any ideas why?
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OCZ Agility 30GB & WD Blue 500GB 7200RPM Asus DVD Drive Corsair H50 Win 7 Home Premium 64bit 
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