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post #501 of 1922
Quote:
Originally Posted by Mdorty;11692126 
Okay, I see what you're saying, I appreciate the explanations.

I'm currently using your suggested setup, everything booted just fine. I'm running p95 blend test right now. I'm gonna let that go for a couple of hours and have Real Temp open to make sure my max temps don't get too high (max so far is 64, so not too bad, especially with 'high' voltages).

Assuming everything passes, I'll try going a bit higher later. A 10% oc on my ram would only be 1172.6, so I should be able to do a 190 bclk, at least if I understand everything I've read correctly, that would put me at ~1140.

I think you could probably hit 1140. Mostly depends on how good the ram is and how high you want to up you ram voltage. Should take more than a step or 2 if any. I have tried to overclock my ram with mixed results because my cpu is so unstable. I had it good and went to messing without writing down the settings.. ALWAYS write down your stable settings and even some that aren't stable so you know what you've tried..

Other than that you could add some headroom by buying faster RAM. This would allow you to go really high with your BCLK on 2:6 RAM ratio or about the same with a 2:8 RAM ratio. Some nice low voltage ram would be nice at like 1600 speed!

Try these http://www.newegg.com/Product/Product.aspx?Item=N82E16820145261

not that great of voltage or latency but they should do the trick
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post #502 of 1922
Quote:
Originally Posted by dembo1305 View Post
I think you could probably hit 1140. Mostly depends on how good the ram is and how high you want to up you ram voltage. Should take more than a step or 2 if any. I have tried to overclock my ram with mixed results because my cpu is so unstable. I had it good and went to messing without writing down the settings.. ALWAYS write down your stable settings and even some that aren't stable so you know what you've tried..

Other than that you could add some headroom by buying faster RAM. This would allow you to go really high with your BCLK on 2:6 RAM ratio or about the same with a 2:8 RAM ratio. Some nice low voltage ram would be nice at like 1600 speed!

Try these http://www.newegg.com/Product/Produc...82E16820145261

not that great of voltage or latency but they should do the trick
Yeah, I may get faster ram at a later date, but for now, I'll see what I can do with the 1066

Update - 3.7ghz on p95 passed four runs, so I upped the bclk to 185 (3897mhz) and am running p95 again to test for stability. So far after about ten minutes, max temp is 65. I love this cooler! Its lowered my temps by more than 20C
post #503 of 1922
Quote:
Originally Posted by Mdorty View Post
Yeah, I may get faster ram at a later date, but for now, I'll see what I can do with the 1066

Update - 3.7ghz on p95 passed four runs, so I upped the bclk to 185 (3897mhz) and am running p95 again to test for stability. So far after about ten minutes, max temp is 65. I love this cooler! Its lowered my temps by more than 20C
Thats good to hear! My temps don't seem to get lower unless i underclock a lot.....

But i'm still working on that. And having slightly faster RAM would allow you to push your CPU further without having to overclock your RAM much or at all..
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post #504 of 1922
Quote:
Originally Posted by cclanso View Post
Overclocking will harm your computer. Don't do it!
Oh ya that was a very helpful suggestion to make at OVERCLOCK.NET Thanks for the heads up, I just put everything back to stock.


Quote:
Originally Posted by dembo1305 View Post
Alrighty that sounds like a good idea, I'll try that.

Do you know anything about CPU differential amplitude or CPU Clock Skew?
CPU differntial amplitude adds noise immunity. Raising it keeps the CPU from recognizing the noise that is created at high overclocks as actual clock signal. Thus creating more stable overclock headroom. As it gets higher it can cause interference with other electronics though. 1000mV on my 930 causes interference with the baby monitor I often keep on my desk when my daughter is napping.

Clock Skew adds delay to the clock signals. Fine tuning skews can enable a better overclock but is purely a trial and error sort of setting with no hard rules to follow. Testing out which skew changes to make that works better than none at all could be very time consuming.

Quote:
Originally Posted by Mdorty View Post
Okay, I see what you're saying, I appreciate the explanations.

I'm currently using your suggested setup, everything booted just fine. I'm running p95 blend test right now. I'm gonna let that go for a couple of hours and have Real Temp open to make sure my max temps don't get too high (max so far is 64, so not too bad, especially with 'high' voltages).

Assuming everything passes, I'll try going a bit higher later. A 10% oc on my ram would only be 1172.6, so I should be able to do a 190 bclk, at least if I understand everything I've read correctly, that would put me at ~1140.
Glad it worked for you. For testing I'd suggest starting with IBT (Intel Burn Test). For a quick and dirty like that I'd run 5 runs of max and if you pass lower the vcore .0125v then test again. Once it fails try raising it .00625 if it fails again raise it another .00625v. At that point run 20 runs of Max. After that repeat with the IMC/VTT and then move onto 12+ hours of small fft Prime 95 then 12+ hours of Prime 95 Blend.
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post #505 of 1922
Quote:
Originally Posted by ~sizzzle~ View Post
Oh ya that was a very helpful suggestion to make at OVERCLOCK.NET Thanks for the heads up, I just put everything back to stock.




CPU differntial amplitude adds noise immunity. Raising it keeps the CPU from recognizing the noise that is created at high overclocks as actual clock signal. Thus creating more stable overclock headroom. As it gets higher it can cause interference with other electronics though. 1000mV on my 930 causes interference with the baby monitor I often keep on my desk when my daughter is napping.

Clock Skew adds delay to the clock signals. Fine tuning skews can enable a better overclock but is purely a trial and error sort of setting with no hard rules to follow. Testing out which skew changes to make that works better than none at all could be very time consuming.



Glad it worked for you. For testing I'd suggest starting with IBT (Intel Burn Test). For a quick and dirty like that I'd run 5 runs of max and if you pass lower the vcore .0125v then test again. Once it fails try raising it .00625 if it fails again raise it another .00625v. At that point run 20 runs of Max. After that repeat with the IMC/VTT and then move onto 12+ hours of small fft Prime 95 then 12+ hours of Prime 95 Blend.
Gotcha, IBT is definitely running my cpu hotter than p95 blend, max of 70c after one run.
post #506 of 1922
If I left speed spectrum enabled and still was stable, should I just leave it on?
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post #507 of 1922
Quote:
Originally Posted by that1guy64 View Post
If I left speed spectrum enabled and still was stable, should I just leave it on?
was it cpu or pci spread spectrum? I personally have them disabled but i suppose if it was fine during 6+ hrs p95 then it would probably be fine to leave it.

Should note that disabling it shouldn't affect its stability if it was already stable. Might allow you to bump down voltages or something??
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post #508 of 1922
Finished five runs of IBT, and it passed Max temp of 70c 185x21 = ~3.9ghz
post #509 of 1922
I tried to go to a 191 bclk, but after post, got an error that said something along the lines of, "...corrupt, checksum does not match..."
I bclk to 188 and it booted just fine. Any idea what the above error is talking about?
post #510 of 1922
Quote:
Originally Posted by Mdorty View Post
I tried to go to a 191 bclk, but after post, got an error that said something along the lines of, "...corrupt, checksum does not match..."
I bclk to 188 and it booted just fine. Any idea what the above error is talking about?
My immediate guess is your RAM is getting to high in speed. So you could try upping the voltage on your RAM by a notch or lower the BCLK.. I think you could be running into a wall with your RAM.. 191*6 is 1146 which is almost a whole 1000 mhz over stock speeds. I would really try upping the voltage by like .02v or something maybe .04
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