I am no expert but I have read in posts that are stickied here at OCN that there are issues with the CPU Ratio 20 for our CPU, try CPU ratio 21.
i7 920 D0 - Can't get 4GHz?!
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You seem to be having the same issue I am, I am currently stable at BCLK of 191x21 @4.0GHz, but like you I am trying to reach BCLK of 200x21 @ 4.2GHz to get the full MHz my memory is rated for. I have tried many setting leading up to my last try with exactly the same voltages and settings you listed with no success.
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The above is from my post for help. I hope you find my current stable settings for [email protected] usefull for now, which would get you just shy of your memorys rated settings.
I will let you know if I can get it stable and what worked for me, if you get it stable at BCLK 200 before me then please post your stable results and settings for BCLK 200. I wold greatly appreciate it!
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Originally Posted by )v(aster At one point in the proccess of trying to get a stable BCLK of 200 my CPU Volt was at 1.3+ with a QPI volt of 1.35 and I was still getting BSOD after a few minutes of prim95 small fft. I decided to seek further assistance at this point as I was afraid of going with higher numbers without guidance. |
I will let you know if I can get it stable and what worked for me, if you get it stable at BCLK 200 before me then please post your stable results and settings for BCLK 200. I wold greatly appreciate it!
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Boots at 195x21 (4095MHz), Passed 1 IntelBurn test so far. However My ram is at like 1550MHz, Setting it to 1800 (it's rated for 2000!) results in a restart during boot. 200x21 (4200Mhz) also results in a restart. CPU is at 1.35v (slightly high, but just for testing)
I've tried setting QPI/DRam up to 1.45v, if I set the ram to "automatically OC to 2000mhz" the board sets this at 1.56v, seems really high? I haven't tested to see if it boots at that though.
Any Ideas?
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Thought settings are stable, however I still can't boot even with my ram at 1800-1900. This is very disappointing as I paid good money for DDR3 2000. If I knew this I would of just went with 1600.
I've tried setting QPI/DRam up to 1.45v, if I set the ram to "automatically OC to 2000mhz" the board sets this at 1.56v, seems really high? I haven't tested to see if it boots at that though.
Any Ideas?
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Originally Posted by )v(aster You seem to be having the same issue I am, I am currently stable at BCLK of 191x21 @4.0GHz, but like you I am trying to reach BCLK of 200x21 @ 4.2GHz to get the full MHz my memory is rated for. I have tried many setting leading up to my last try with exactly the same voltages and settings you listed with no success. The above is from my post for help. I hope you find my current stable settings for [email protected] usefull for now, which would get you just shy of your memorys rated settings. I will let you know if I can get it stable and what worked for me, if you get it stable at BCLK 200 before me then please post your stable results and settings for BCLK 200. I wold greatly appreciate it!
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My temps are fine, so no need to turn of HT. My cpu seems stable at 195x21, passed 3 intelburns so far. Definitely not 24/7 stable, but decently stable. 200x21 won't work though, won't even boot.
My bios have none of the "8x, 16x, 18x" settings.. =/
Originally Posted by Autox Don't mess with ram until you get your CPU stable. I would set your cpu to 191x21, and lower all your volts back down to default except for vCore, turn off HT for now and see what happens. Set your ram back to 8x, uncore to 16x, qpi to 18x. |
My bios have none of the "8x, 16x, 18x" settings.. =/
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The HT is because it requires a lot more volts to get it stable with it on vs. off. Its just not a heat issue.
For 191Bclk
8x=1528 ram
16x= 3056 uncore
18x (x2)=6876 QPI link
Originally Posted by Murlocke My temps are fine, so no need to turn of HT. My cpu seems stable at 195x21, passed 3 intelburns so far. Definitely not 24/7 stable, but decently stable. My bios have none of the "8x, 16x, 18x" settings.. =/ |
For 191Bclk
8x=1528 ram
16x= 3056 uncore
18x (x2)=6876 QPI link
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I am glad you are getting closer, I feel your pain! I think I had also tried 195 for a quick minute and it seemed to be ok.
What you said just made me wonder is it safe to run with my current OC settings 24/7? Should I enable speedstep & would that make it ok to run my current oc of 191x21 24/7? How do you know if its safe to run 24/7?
Originally Posted by Murlocke My temps are fine, so no need to turn of HT. My cpu seems stable at 195x21, passed 3 intelburns so far. Definitely not 24/7 stable, but decently stable. 200x21 won't work though, won't even boot. My bios have none of the "8x, 16x, 18x" settings.. =/ |
What you said just made me wonder is it safe to run with my current OC settings 24/7? Should I enable speedstep & would that make it ok to run my current oc of 191x21 24/7? How do you know if its safe to run 24/7?
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I just ment that I'd need to stability test longer for it to be 24/7.
IntelBurn has passed 8 tests at 4.1GHz, however firefox just crashed twice?
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Originally Posted by )v(aster I am glad you are getting closer, I feel your pain! I think I had also tried 195 for a quick minute and it seemed to be ok. What you said just made me wonder is it safe to run with my current OC settings 24/7? Should I enable speedstep & would that make it ok to run my current oc of 191x21 24/7? How do you know if its safe to run 24/7? |
IntelBurn has passed 8 tests at 4.1GHz, however firefox just crashed twice?
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The best advice I can give you is to simply overclock the CPU as hard as you can with HT ON. If temps aren't holding you back, then there is no reason to ditch HT and then go back and turn it on. All you would do is double the stability testing for no reason.
The 8000gt/s QPI wall won't hit until 222mhz base clock so don't worry about that.
A quick way to find out if your motherboard/IMC can take 2000mhz ram under any circumstances is to reduce the chip to 3.486ghz (166x21) and set the ram to (166x12)=1992mhz. You will find that the need for QPI/DRAM voltage is pretty crazy (More than likely 1.40v+). Some IMC's cannot hit 2000mhz on the ram period. The motherboard can ussually hit it without much issue.
I would overclock the CPU until you've reached it's max and then set the ram speed as high as possible and stabilize. This may be 1690mhz if you reach 211mhz Base clock or even only 1560mhz is you can only get 195mhz base clock. Then tighten the timings as much as possible. With my tridents, I was able to get 1720mhz 7-7-7-21-1T, which I am happy with, but you are right it is not the 2000mhz you paid for.
This is the big letdown/misconception for new i7 owners.
Originally Posted by Murlocke Boots at 195x21 (4095MHz), Passed 1 IntelBurn test so far. However My ram is at like 1550MHz, Setting it to 1800 (it's rated for 2000!) results in a restart during boot. 200x21 (4200Mhz) also results in a restart. CPU is at 1.35v (slightly high, but just for testing) I've tried setting QPI/DRam up to 1.45v, if I set the ram to "automatically OC to 2000mhz" the board sets this at 1.56v, seems really high? I haven't tested to see if it boots at that though. Any Ideas? Thought settings are stable, however I still can't boot even with my ram at 1800-1900. This is very disappointing as I paid good money for DDR3 2000. If I knew this I would of just went with 1600. |
The 8000gt/s QPI wall won't hit until 222mhz base clock so don't worry about that.
A quick way to find out if your motherboard/IMC can take 2000mhz ram under any circumstances is to reduce the chip to 3.486ghz (166x21) and set the ram to (166x12)=1992mhz. You will find that the need for QPI/DRAM voltage is pretty crazy (More than likely 1.40v+). Some IMC's cannot hit 2000mhz on the ram period. The motherboard can ussually hit it without much issue.
I would overclock the CPU until you've reached it's max and then set the ram speed as high as possible and stabilize. This may be 1690mhz if you reach 211mhz Base clock or even only 1560mhz is you can only get 195mhz base clock. Then tighten the timings as much as possible. With my tridents, I was able to get 1720mhz 7-7-7-21-1T, which I am happy with, but you are right it is not the 2000mhz you paid for.
This is the big letdown/misconception for new i7 owners.
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Do not worry about firefox, although not everyone has the issue it is known that firefox is having issues with win7 64bit. I myself have had to go back to IE for 90% of my browsing, though with all the changes they have made since I stopped using IE its all good!
Originally Posted by Murlocke I just ment that I'd need to stability test longer for it to be 24/7. IntelBurn has passed 8 tests at 4.1GHz, however firefox just crashed twice?
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@ChickenInferno I am having same issues, cant reach 200x21, stable at 191x21. Can you forward me to a good guide on tightening my timmings? Currently at 1528MHz 8-8-8-24-1T or is it not possible to get it any better then that? Its TR3X6G1600C8D Corsair 6gig kit its rated at 1600MHz 8-8-8-24.
Originally Posted by ChickenInferno The best advice I can give you is to simply overclock the CPU as hard as you can with HT ON. If temps aren't holding you back, then there is no reason to ditch HT and then go back and turn it on. All you would do is double the stability testing for no reason. The 8000gt/s QPI wall won't hit until 222mhz base clock so don't worry about that. A quick way to find out if your motherboard/IMC can take 2000mhz ram under any circumstances is to reduce the chip to 3.486ghz (166x21) and set the ram to (166x12)=1992mhz. You will find that the need for QPI/DRAM voltage is pretty crazy (More than likely 1.40v+). Some IMC's cannot hit 2000mhz on the ram period. The motherboard can ussually hit it without much issue. I would overclock the CPU until you've reached it's max and then set the ram speed as high as possible and stabilize. This may be 1690mhz if you reach 211mhz Base clock or even only 1560mhz is you can only get 195mhz base clock. Then tighten the timings as much as possible. With my tridents, I was able to get 1720mhz 7-7-7-21-1T, which I am happy with, but you are right it is not the 2000mhz you paid for. This is the big letdown/misconception for new i7 owners. |
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Tightening the timings is actually a fairly easy (but long process). I'll pm you with details rather than linking a guide as the guides mostly tell you what the timings do.
Originally Posted by )v(aster @ChickenInferno I am having same issues, cant reach 200x21, stable at 191x21. Can you forward me to a good guide on tightening my timmings? Currently at 1528MHz 8-8-8-24-1T or is it not possible to get it any better then that? Its TR3X6G1600C8D Corsair 6gig kit its rated at 1600MHz 8-8-8-24. |
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Looking forward to the pm! Thank you!
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Originally Posted by ChickenInferno Tightening the timings is actually a fairly easy (but long process). I'll pm you with details rather than linking a guide as the guides mostly tell you what the timings do. |
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Hmm...I dont know what your talking about. Most D0 can do 4.0ghz at 1.3v that ive seen on ocn. Heck mine does 4.2ghz with HT on at 1.22ghz stable. Takes me around 1.45-1.50ghz for 5.0Ghz not stable.
Originally Posted by jshay 1.3vcore isn't that high. Many D0's can't do 4.0ghz at 1.3vcore, heck mine can't either. I would raise it since you have quite a bit of headroom on that. |
Hmm...I dont know what your talking about. Most D0 can do 4.0ghz at 1.3v that ive seen on ocn. Heck mine does 4.2ghz with HT on at 1.22ghz stable. Takes me around 1.45-1.50ghz for 5.0Ghz not stable.
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