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OC E6850 - 3400Mhz too much to ask on air?

NICE!!!!!!!!!!!!! :)

Got there in the end dind't we mate!

Anyway, good plan....give it some serious abuse and see if it falls over.

If it does fall over, leave EVERYTHING alone apart from upping the CPU voltage abit at a time.

If the voltage is getting silly and it still falls over then we'll need to look at RAM dividers, voltage and latency timings.

Technically, 3.4GHz to 3.6GHz should be relatively easy to reach with the kit you have!

:D
 
Sounds good to me!!!

Will set Prime95 going in a bit for an overnight ass wooping!!

Again, thanks for the help!

:p:p
 
Dont be afraid to push 1.4/1.5 volts through the chip to achieve a higher clock, just remember to watch temps tho. Anything less than 75/70 uner load is fine. :cool:
 
Well 9 1/2 hours with Prime95...no errors....fanbloomingtastic!! The highest temp it hit under full load was 60 degrees..so looking good :cool:

I have noticed that even though I have specified 1.45v for the Vcore it only shows up as 1.36v within CPUz...is that Vdroop? If so, would it be best to increase it so it actually shows 1.45v in CPUz? If I needed to :D:D

Prime95-3300Mhz.JPG



And the next increase begins....
 
Do you have the latest version of CPU-Z? Only the latest 1.41 shows correct voltage on C2Ds.

Well if it's stable at that then you needn't increase the voltage. Increase the speed until it's unstable before you increase the voltage again.

Well done there, you still have quite a bit of headroom there so i think 3.4Ghz should be easy.
 
Yeah, got 1.41.

Have increased to 3394Mhz...just about to run a few tests.

Will post back in a bit if its all stable :D:D
 
Good stuff, keeping increasing the fsb until you cant post, then push a few more volts through it and see how far you can get. 60 under load is absolutly fine. :)
 
OK just ran Prime95 for just over 4 hours @ just under 3.4Ghz (3392Mhz) and all ok...even the CPU temp didn't increase :D

CPUz-3392mhz.JPG


Prime95-3400Mhz.JPG



And again....the next increase begins....i'm kinda getting hooked :eek::eek:
 
I was wondering what the Blend test was....it only says that it does more tests on the RAM. Can anyone give me a better idea? :confused:

I have now clocked it up to 3.5Ghz and it seems stable but have not ass whooped it yet with Prime95!! But still ide @ 32 degrees.

CPUz-3500mhz.JPG


:D:D
 
OK so thought I would give a quick update.....

Last night ran 10 hours on Prime95 @ 3.5Ghz without any errors...this is really working out well. Thanks to everyone who has helped me with this one, especially Andy who really got this thing moving :D:D

I will be pushing further today.....fingers crossed, and then I will be trying the blend test....don't know much about that one but seems that its the norm to push it through. :eek:

Prime95-3501Mhz.JPG


:cool:
 
OK so I'm starting to get issues now...I wondered how long it would take :eek:

I tried increasing to 3600Mhz using the same Vcore (1.45v) but would not boot. So increased the core volts to 1.5v, and dropped to 3550Mhz, however even though it booted my anti-virus (NOD32) will not initialize...which I understand is a tell tale sign of system instability. I then dropped the Core volts to 1.485v but same thing happened....any ideas where I go next? :D:D

Just for your info, I ran a quick test with OCCT 1.1.1 and it reported a crash after just 5 seconds!!

Also do I need to increase the CPU VTT volts as well as the VCore? Both were sat at 1.45v.

Settings as of right now:

VCore 1.485v
HTT 1.6v
NB 1.5v
SB 1.5v
CPU VTT 1.45v
PCI 101Mhz
Mem timings - 5 - 5 - 5 - 15
FSB Divider linked, RAM in synced mode
CPU temp around 33 degrees idle
FSB 1576 @ 3550Mhz (x9 mp)
 
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GmanUK said:
Also do I need to increase the CPU VTT volts as well as the VCore? Both were sat at 1.45v.

Settings as of right now:

VCore 1.485v
HTT 1.6v
NB 1.5v
SB 1.5v
CPU VTT 1.45v No Need to touch this now - 1.45 is most stable!
PCI 101Mhz
Mem timings - 5 - 5 - 5 - 15
FSB Divider linked, RAM in synced mode
CPU temp around 33 degrees idle
FSB 1576 @ 3550Mhz (x9 mp)
Click to expand...

Hi mate...CRIKEY you're doing really well:D

Try these settings:

VCore 1.525v
HTT 1.65v
NB 1.5v
SB 1.5v
CPU VTT 1.45v
PCI 101Mhz
Mem timings - 5 - 5 - 5 - 18
FSB Divider linked, RAM in synced mode

WHAT'S YOUR RAM VOLTAGE AT MATE?

:D
 
If you have good cooling then I'd push vcore a bit further, the most I put was 1.55V.

2.4V through ballistix :eek: you gonna kill your RAM in no time :eek::eek::eek:
 
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Try the RAM at 2.2 if it was stable at that. Only up it to 2.3 if its crashing the PC regardless.

If the extra voltage settings above increase stability then the RAM is obviously fine as no speeds or latencies will have been changed, just a little extra voltage through the CPU.

If its still the same with the CPU voltage increase (above) and crashes out, then slacken off the RAM timings (above) and increase to the other voltages I've listed above! :)

*EDIT*

Just read this back to myself and I'm struggling to understand my own waffle so:

Put simply....up CPU voltage to the setting I listed above.

If its still unstable try the RAM settings (above) at your original CPU voltage... touch NOTHING else)

If its still on the blink..use the settings listed above together.

"Phew"...now I understand! LOL :)
 
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lol....glad its not just me who doesn't understand their own writing!! :eek:

OK....will get on with it and see where we go :D

Will be back in a bit hehehehe :D

Thanks again.....
 
Hi all

I pushed it to 3.6Ghz last night and all seemed really well....but overnight I ran a Blend test and one core failed after 3 hours:

Prime95_Blend-3600Mhz-fail.JPG



The OS seems stable. I'm not sure if increasing the Vcore would work with this one....any ideas? Prime does say to consult the stress.txt but there does not appear to be one.....

:(
 
Yeah the blend test stresses both the CPU and RAM together and is a more vigorous test overall.. If it fails the large FFTs doesn't it usually indicate a RAM issue?
 
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