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i7 920 4ghz/ram puzzle - expert advice needed

post #1 of 8
Thread Starter 
Hi everyone, Ive got a problem which drives me crazy!

my story: I have an i7 950 which I managed to overclock to 4ghz 24h P95 stable with 1.34v.

After complete disappointment with that, I started looking at my Ram and mobo for problems. So, I removed one of my two 4gb ram sticks and my computer was able to run P95 for around 20 minutes until it BSOD'ed and with much lower voltages than 1.34.

What I exactly did is: tried 1.3 vcore with both my sticks and got BSOD within few minutes as well as temps above 76C; then removed 1 stick (1 left on the mobo) and I could do 20min+ of P95 with temps in the region of mid 60s. Then, as I said it BSOD with codes 0x0A and 0xD1, which may indicate unstable ram. It actually BSOD's 2 times during 8k FFTs (the second group of tests of a blend test)

Is my Ram problematic? Does it matter that I have a dual channel setup and not a triple?

Desperate for help and ideas
Edited by traxevc - 5/28/11 at 1:38pm
Polypragmon
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Polypragmon
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post #2 of 8
I'm thinking the problem isn't your ram or cpu vcore as much as the supporting voltages you are using. This would explain the identical results between two different chips and the greater stability you attained when less ram was used.
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J III
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post #3 of 8
I agree with Interpolation, if removing a stick of ram made a noticeable improvement, you should be tinkering with your VTT/uncore voltage (your motherboard probably calls it "qpi/dram"). Also play with the cpu and qpi pll voltages, if possible.
 
Wild eyes (2015)
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Wild eyes (2015)
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post #4 of 8
Thread Starter 
I have tried a lot of different settings i.e. QPI/Dram voltages range 1.2-1.35. It does not seem to affect it much.

My plan is to sell my ram and get a triple channel kit (6GB)

If this does not help, I can borrow another mobo and test.

In the meantime, if anyone has any insight as to what might be happening please do not hesitate to post.

thanks a lot
Polypragmon
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Polypragmon
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post #5 of 8
Thread Starter 
Does anybody know if having 4gb modules makes it necessary to use higher vcore/qpi? What happens is that if I use low qpi and low vcore it gives me BSOD with a code indicating the increase of qpi; if then I increase the qpi, it gives me BSOD with a code referring to vcore (i.e. to increase it). It thus shows that with both my 4gb modules i need high qpi and high vcore in order to stay stable @ 4ghz. If one of the two is low, then i get bsod.

Now, if I remove one stick my system performs a bit better with lower qpi/vcore.

Does anybody think I will see improvement if I get 3 modules of 2GB corsair dominator, instead of my current 2 modules of 4gb (Geil Value Plus, 1.6V max)?
Polypragmon
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Polypragmon
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Hard DriveOptical DriveOSMonitor
c300 crucial + 3 SATA's DVD-RW (LG) windows 7 x64 enterprise sp1 17'' monitor 1280x1024 max res 
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post #6 of 8
It's possible that different ram may help... I know many people with Evga boards had unusual issues when trying to use OCZ Gold ram. But don't count on this being the problem .

What you should do is keep your current bclk and ram multiplier, but lower the cpu multi until it's at stock speeds and voltage. If you still get errors after that, you know it's the uncore/ram. If you do the opposite (have cpu at 4ghz but ram and uncore at stock timings and speed) and get errors, you know the cores are to blame.
 
Wild eyes (2015)
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Wild eyes (2015)
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CPUMotherboardGraphicsRAM
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Hard DriveCoolingOSMonitor
Samsung 950 PRO M.2 256GB SSD Noctua NH-U9S Windows 10 Home Retail Acer XB270HU 
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Corsair SF600 NCase M1 
CPUMotherboardGraphicsRAM
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CPUMotherboardGraphicsRAM
AMD FX-8350 5GHz at 1.524v ASUS Crosshair V Formula-Z Sapphire R9 290X with EK water block 2x4GB G.Skill Trident X 2500MHz 9-11-11 1.68v  
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post #7 of 8
Thread Starter 
THanks for the advice. I will try it.

What I actually did is I changed the RAM to a triple channel kit (corsair dominator) and also tried another mobo I borrowed. I am getting same results!!

This whole process has really taken too much of my life and I would like to go back to my stable 4ghz @1.34 with my original i7 950.

But I have another problem now:

I put back my i7 950 and my stable 4ghz settings and ran a blend test with P95. It BSOD'ed after 23 hours with 0x00000001E!! I would never expect a BSOD after 23 hours. A rounding error perhaps....

ANyway, there are 3 things that changed in my setup after all my experimentations: DIfferent RAM modules (3 x 2GB ones now running @ 1.64v as opposed to my 2 x 4gb ones running at 1.58), OS (win 7 x64) has been messed up with drivers a little bit from the mobo swap, and I also loaded the latest BIOS for my mobo (I had one before the latest: the 0502; now Ive got the 0602 or something)

MY plan is to reinstall OS and memtest the Ram (i know I should have done in advance of my oc but I could not wait to test the hardware)

Any ideas why a BSOD after 23 hours of P95?
Polypragmon
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CPUMotherboardGraphicsRAM
i7 950 @ 4Ghz @ 1.34 Asus P6X58D-e MSI twin frozrii GTX 470 Corsair Dominator 3 x 2GB 
Hard DriveOptical DriveOSMonitor
c300 crucial + 3 SATA's DVD-RW (LG) windows 7 x64 enterprise sp1 17'' monitor 1280x1024 max res 
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XFX 750w pro series antec 100 
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Polypragmon
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4Ghz @ 1.34 Asus P6X58D-e MSI twin frozrii GTX 470 Corsair Dominator 3 x 2GB 
Hard DriveOptical DriveOSMonitor
c300 crucial + 3 SATA's DVD-RW (LG) windows 7 x64 enterprise sp1 17'' monitor 1280x1024 max res 
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post #8 of 8
Quote:
Originally Posted by traxevc View Post
Any ideas why a BSOD after 23 hours of P95?
Your overclock was only 99% stable. I've had OCs that breeze through 12 hours of Prime and 50 passes in LinX, but BSoD after 3 days of straight Folding.

Only overclock part of your setup, like I recommended earlier, to narrow the list of suspects. You can also use different modes/FFT sizes in Prime to stress only the cores (small) or cores and uncore (large). Lastly, try stressing with LinX or IBT... using 4GB of ram or more, you can find errors much quicker (3 hours of Linpack is equivalent to 12 hours of prime).
 
Wild eyes (2015)
(10 items)
 
 
CPUMotherboardGraphicsRAM
AMD Ryzen 7 1700 3.8GHz at 1.232v ASRock Fatal1ty X370 Gaming-ITX/ac MSI GTX 1080Ti FE 1750MHz at 0.8v G.SKILL TridentZ 2x8GB 3466MHz 
Hard DriveCoolingOSMonitor
Samsung 950 PRO M.2 256GB SSD Noctua NH-U9S Windows 10 Home Retail Acer XB270HU 
PowerCase
Corsair SF600 NCase M1 
CPUMotherboardGraphicsRAM
i7 5960X 4.6GHz at 1.2V  Asus X99 Deluxe Evga 980 Ti SC+ Corsair Dominator Platinum 16GB at 2666 MHz 16-... 
Hard DriveCoolingOSMonitor
Samsung 950 Pro 256GB EK Supremacy EVO, EK Titan X Full Cover, EK X99... Windows 10 Home retail Acer Predator XB270HU 
PowerCase
Seasonic SS-760XP2 Corsair Air 540 White 
CPUMotherboardGraphicsRAM
AMD FX-8350 5GHz at 1.524v ASUS Crosshair V Formula-Z Sapphire R9 290X with EK water block 2x4GB G.Skill Trident X 2500MHz 9-11-11 1.68v  
Hard DriveCoolingOSMonitor
Samsung 850 Pro 256GB + 2x Seagate 3TB HDDs Koolance CPU-380A water block Windows 7 64-bit Home Premium BenQ XL2720Z 
PowerCase
Seasonic X 650 Gold Lian Li PC-T60B test bench 
  hide details  
Reply
 
Wild eyes (2015)
(10 items)
 
 
CPUMotherboardGraphicsRAM
AMD Ryzen 7 1700 3.8GHz at 1.232v ASRock Fatal1ty X370 Gaming-ITX/ac MSI GTX 1080Ti FE 1750MHz at 0.8v G.SKILL TridentZ 2x8GB 3466MHz 
Hard DriveCoolingOSMonitor
Samsung 950 PRO M.2 256GB SSD Noctua NH-U9S Windows 10 Home Retail Acer XB270HU 
PowerCase
Corsair SF600 NCase M1 
CPUMotherboardGraphicsRAM
i7 5960X 4.6GHz at 1.2V  Asus X99 Deluxe Evga 980 Ti SC+ Corsair Dominator Platinum 16GB at 2666 MHz 16-... 
Hard DriveCoolingOSMonitor
Samsung 950 Pro 256GB EK Supremacy EVO, EK Titan X Full Cover, EK X99... Windows 10 Home retail Acer Predator XB270HU 
PowerCase
Seasonic SS-760XP2 Corsair Air 540 White 
CPUMotherboardGraphicsRAM
AMD FX-8350 5GHz at 1.524v ASUS Crosshair V Formula-Z Sapphire R9 290X with EK water block 2x4GB G.Skill Trident X 2500MHz 9-11-11 1.68v  
Hard DriveCoolingOSMonitor
Samsung 850 Pro 256GB + 2x Seagate 3TB HDDs Koolance CPU-380A water block Windows 7 64-bit Home Premium BenQ XL2720Z 
PowerCase
Seasonic X 650 Gold Lian Li PC-T60B test bench 
  hide details  
Reply
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