Overclock - First Attempt

Vern1961

Vern1961

Vern1961

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Joined
29 Mar 2007
Posts
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Location
Swindon UK
Now I've fitted some decent (Geil DDR2 800Mhz) memory in my PC, I'm now starting my first attempt at an overclock. Not greedy - 3.0Ghz will suffice.

Specs are Gigabyte P965 S3 Mobo, C2D 6600 (Stock 2.4Ghz) and the above mentioned RAM. At stock, CPU idles at @43C, under stress @60C.

First attempt I have taken the CPU up to 2.7 Ghz. I have upped the Vcore from default 1.25 to 1.2875 - the recommended 1.45 in the Gigabyte DS3 thread seemed a bit toasty to me. The RAM I'm running at +0.2v (i.e. 2.0), I know the Geil is rated at 2.1v but a +0.3 overvolt in the BIOS is shaded purple, which I presume is a warning.

I've been running Orthos for an hour now and passed the first (10k) test and is now into the 896 round. Temps (Speedfan) are holding steady around 65c.

So as we appear to be "cooking on gas" at 2.7Ghz, I just wondered what recommendation the experts have to get my 3Ghz? I'm particularly interested in whether I need to go a bit higher on the Vcore or whether 3.0Ghz Orthos stable is achievable on 1.2875?
 
should be ok for 1.4 on the vcore, carry on upping the fsb til it fails orthos then up the voltage slightly.

2.0 will be fine for the memory but dont worry about going to 2.1 if needed, although the bios is shaded the memory has 2.1v as a valid voltage so you wont be breaking the warranty/guarantee on it.

try using core temp or real temp to monitor you're temps.
 
Thanks for the blog links.

I know it's not the full test cycle, but after three hours Orthos was rock solid at 2.70Ghz. So I think I'm going to follow the advice in the blogs and try it at that setting for a couple of weeks, run some CPU intensive stuff like Oblivion, Flight Sim-X and Crysis (the latter being more of a stress test than Orthos!!) then take it from there. I'm happy at 2.70, 3 would be nice but have to trade off against how many of my current programmes would actually take advantage of the slight increase. 2.7 is 0.3 of a Ghz more than I could get to with the old 533 RAM installed (i.e. no higher than stock) and as said on these boards before - anything over stock is a bonus!
 
Well here's a strange thing...

After running the overclock successfully for two weeks, when the PC posted yesterday evening, I noticed the BIOS had reset itself to run the CPU at stock speed (267 x 9 = 2400). Haven't had a chance to investigate further but any reason why it would do that? I mean, I've had no startup errors or any indication that things are wrong.

Odd.
 
Even stranger...booted up just now and it's showing 2.7Ghz (9 x 300) again.

Obviously Gigabyte mobos have a mind of their own!
 
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