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E8400 4GHZ Clock? - Page 5

post #41 of 98
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Quote:
Originally Posted by DChat View Post
Huh? Memtest will show at least that his ram CAN run at the desired timings.. if they don't like 5-5-5-15@890MHz with his board, he needs to know that. No use in stressing the current ram settings when one at least doesn't know that much.
I've tested the ram with memtest no errors were found at 5-5-5-15-3-55, should i lower the voltage from 2.2v to 2.1v ? I really do not know what to look for now...
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post #42 of 98
For my P5Q Turbo & 8500 C0(what is a crappy overclocker), i'm using 514 fsb and
multi 8x.

Vcore with my p.o.s. chip is needed for 4Ghz P95 5hrs & ibt max 20 runs stable is 1.38v.. 1.42v for 4.11Ghz.
So, your E0 should need even less. More likely your problem is with other volts..
I only need Cpu PLL 1.56v, VTT 1.3, Gtl ref 0.65x and vNB 1.32 for 514fsb.

I used other methods for finding stable settings for my board.. I put my multi down to 6x(about stock speed for my E8500), vCore to 1.225-1.23v as it's my default VID and started running P95 with Large FFT's for 3-4 hours. Tweaking only one voltage setting at the time so i knew what made it better and what made it worse.

^This is how i found my right settings for 514fsb. As it was a bit downclocked, there's no need to be playing with the vCore.

After getting through 4,5hrs of P95, i upped my multi to 8x and started running IBT with max mem 20 runs. If it fails, give it more vCore and try again. At this point it's only up to the vCore as the mobo is stable with high fsb and mem speed.
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post #43 of 98
Quote:
Originally Posted by Kuyumdzhiev View Post
I've tested the ram with memtest no errors were found at 5-5-5-15-3-55, should i lower the voltage from 2.2v to 2.1v ? I really do not know what to look for now...
Could you check if you can get your ram speed closer to 1066MHz by changing the NBstrap in your bios?
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post #44 of 98
Quote:
Originally Posted by donrapello View Post
For my P5Q Turbo & 8500 C0(what is a crappy overclocker), i'm using 514 fsb and
multi 8x.

Vcore with my p.o.s. chip is needed for 4Ghz P95 5hrs & ibt max 20 runs stable is 1.38v.. 1.42v for 4.11Ghz.
So, your E0 should need even less. More likely your problem is with other volts..
I only need Cpu PLL 1.56v, VTT 1.3, Gtl ref 0.65x and vNB 1.32 for 514fsb.

I used other methods for finding stable settings for my board.. I put my multi down to 6x(about stock speed for my E8500), vCore to 1.225-1.23v as it's my default VID and started running P95 with Large FFT's for 3-4 hours. Tweaking only one voltage setting at the time so i knew what made it better and what made it worse.

^This is how i found my right settings for 514fsb. As it was a bit downclocked, there's no need to be playing with the vCore.

After getting through 4,5hrs of P95, i upped my multi to 8x and started running IBT with max mem 20 runs. If it fails, give it more vCore and try again. At this point it's only up to the vCore as the mobo is stable with high fsb and mem speed.
Great info dude, but how did you come to the idea of going for 514fsb?
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post #45 of 98
Quote:
Originally Posted by DChat View Post
Great info dude, but how did you come to the idea of going for 514fsb?
For going just above 4.1Ghz, that's why

My system is a lot faster with higher fsb. Earlier i used 445fsb and upping the fsb to 500+ made some difference.

500x8 for 4Ghz, i got stable earlier already. I only had to tweak vNB and Vtt .02-.04 to get stable at 514.
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post #46 of 98
Quote:
Originally Posted by donrapello View Post
For going just above 4.1Ghz, that's why

My system is a lot faster with higher fsb. Earlier i used 445fsb and upping the fsb to 500+ made some difference.

500x8 for 4Ghz, i got stable earlier already. I only had to tweak vNB and Vtt .02-.04 to get stable at 514.
Nice Though with your rig i'm sure you could prolly go a bit higher than 4.1GHz

Ever tried?

I was at 4.23xGhz, 9.5multi, 1.44v vcore, 1.3v NB, 1.5v CpuPLL... was too lazy to try any higher or tweak any other settings, hehe.
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post #47 of 98
Quote:
Originally Posted by DChat View Post
Nice Though with your rig i'm sure you could prolly go a bit higher than 4.1GHz

Ever tried?

I was at 4.23xGhz, 9.5multi, 1.44v vcore, 1.3v NB, 1.5v CpuPLL... was too lazy to try any higher or tweak any other settings, hehe.
Actually my E8500 is truely a bad one. As it's C0-stepping, it requires a lot more vcore than E0. It also gives a lot of heat
That's why watercooling setup was the way for me.. even now it's pretty hot on IBT. Most E0's run cooler than this one on air
For 4.2+ i think this would nearly 1.5v to get rock solid..
Current 4.1+ and my 800mhz DDR2 @ 1030mhz has been serving me good enough.

It took about 5 days to get this p.o.s. stable. I've been very dissapointed with this cpu i got as what comes to overclocking

Well, i already ordered i5-2500k, UD4,HX750, Ripjaws & Gtx 570 + waterblock.. So this era ends soon
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post #48 of 98
Quote:
Originally Posted by donrapello View Post
Actually my E8500 is truely a bad one. As it's C0-stepping, it requires a lot more vcore than E0. It also gives a lot of heat
That's why watercooling setup was the way for me.. even now it's pretty hot on IBT. Most E0's run cooler than this one on air
For 4.2+ i think this would nearly 1.5v to get rock solid..
Current 4.1+ and my 800mhz DDR2 @ 1030mhz has been serving me good enough.

It took about 5 days to get this p.o.s. stable. I've been very dissapointed with this cpu i got as what comes to overclocking

Well, i already ordered i5-2500k, UD4,HX750, Ripjaws & Gtx 570 + waterblock.. So this era ends soon


thx to your post, you inspired me to try 4.25GHz.. 500x8.5@1.45v

but enough threadjacking

http://img268.imageshack.us/i/95447799.jpg
Edited by DChat - 3/8/11 at 10:26am
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post #49 of 98
Thread Starter 
Quote:
Originally Posted by DChat View Post
Could you check if you can get your ram speed closer to 1066MHz by changing the NBstrap in your bios?
At the current settings i cant get near 1066, I've tried 8xmulti,530 bus, 400 fsb, same ram timings, same voltages except vcore which i've set to 1.35. With those settings i get 1060 mhz on the mem, but IBT failed at 20 runs maximum settings. Now i've returned to the original unstable mem settings 9xmulti, 445 bus, 333 fsb, 891mhz mem, same timings same voltages, 1.33 vcore. I just dont know if I can get the ram stable at those settings, I'm really confused now...
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post #50 of 98
Kuyumdzhiev, i really recommend you try the method what i used for finding stability.
You won't get it stable in weeks if you go like that

Just start with 500x6 for example, put your vcore to 1.25v max, Cpu PLL to 1.54-1.58v, Gtl ref x.65, Fsb term/Vtt 1.26-1.32, vNb 1.26-1.3v, Sb 1.2. Disable almost everything at that page. Then try running P95 with large fft's.

With 500x6 your ram should go with 1:1 divider to 1000mhz? It's not dangerous
Also too much voltage on my mem made it unstable. tried with 2.1-2.2v and failed.. then 2.04v was the right one.

My board was very unstable if i put too much Vtt or vNb.. .02 made difference to either way.

If Prime95 fails, make a small change in ONE setting and see how it goes.. better or worse. If you change too many settings on every boot you won't find out what's helping you and what's not. But don't change vcore because it isn't needed atm.

Otherwise it's gonna be endless cycle.. or with a lot of luck you'll find the settings
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