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Any advice for getting my Q9550 (C1) past 4GHz? (P5Q Deluxe) - Page 2

post #11 of 14
DEC_42: I had stability issues at 470FSB+ on my P5Q too, and it was the RAM failing, so I'd isolate RAM test in P95 to confirm that in your case. The solution for me was to set RAM timings to Auto; helped even more than setting performance level to 11 which just gimped performance without adding stability. PLL is definitely key, I just instinctively set it to 1.6 now whenever I venture over 450 FSB
Quote:
Originally Posted by crashdummy35;14246010 
You are definitely in the Danger Zone at that voltage man. Couple of years back AlMighty did an experiment with a 45nm chip and at 1.6v it burnt the pads. 1.6v 24/7 The chip still worked but the pads were burnt and that means the cpu socket itself was soon to go too. Your hardware, just a heads up for you.

Good luck.

I find it funny you say that because we have the same chips and I take mine to 1.65 regularly and have never had any problem. If you read the thread you linked to, you'll notice the guy had 120 degrees at one point which is far more likely to be the culprit of any sort of damage than simply running a lot of juice through the chip.
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post #12 of 14
Quote:
Originally Posted by KingT View Post
I have managed to run my P5Q Pro @ 506MHz FSB and it was stable in games,3DMark 11,Cinebench but it would error on cores i P95 Large FFT test..

P5Q Deluxe is better mobo and it has better CPU GTL and NB GTL options in BIOS,but still I'm almost sure that 500MHz FSB stable in P95 Large FFT test is not possible on it..

Maybe ~ 485MHz FSB is more realistic overclock..


And KEEP Vcore UNDER 1.4V (UNDER LOAD) AT ALL TIME..

KEEP YOUR CORE TEMPERATURES UNDER 75C AT ALL TIME..



CHEERS..
Listen to this guy.
post #13 of 14
Quote:
Originally Posted by Petrol View Post
DEC_42: I had stability issues at 470FSB+ on my P5Q too, and it was the RAM failing, so I'd isolate RAM test in P95 to confirm that in your case. The solution for me was to set RAM timings to Auto; helped even more than setting performance level to 11 which just gimped performance without adding stability. PLL is definitely key, I just instinctively set it to 1.6 now whenever I venture over 450 FSB



I find it funny you say that because we have the same chips and I take mine to 1.65 regularly and have never had any problem. If you read the thread you linked to, you'll notice the guy had 120 degrees at one point which is far more likely to be the culprit of any sort of damage than simply running a lot of juice through the chip.
Well, I'm just trying to help the bro out "conservatively".

We have the same chip but mine is total crap. Takes me 1.462v in CPU-Z for 4.15GHz, any less and it fails PRIME95. It's been at 4.05GHz with 1.440v CPU-Z for the last 2 years. I just broke it down for a cleaning about 2 weeks ago and I checked the pads and my socket and everything looks cool. Still only reaches ~59c in PRIME and never goes above 47c in a game, and that's cause I'm using the PK1 TIM that comes with the Mega for the moment; temps were about 4 degrees lower using my old OCZ FREEZE.

almighty had some high temps because he was having trouble with his loop. The chip stayed under water the entire experiment. But in the end it burnt at 1.6v CPU-Z.
__________________________________________________ ____

@ op, so what's the latest?
How's the oc going?
Also, if you've got the room in your case and you have an old fan laying around, try making a shroud for the push fan on your Mega. I always thought that it was more trouble than it was worth but, in the end, it lowered my load temps by ~4 degrees on average. Shrouds work...no doubt about it. Check out DUCKY's tut on making the shroud and why it helps.
Edited by crashdummy35 - 7/21/11 at 9:58am
 
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post #14 of 14
Thread Starter 
Got a Delta for the Mega. Damn loud, but the shroud helped. Vcore is 1.39, PLL is 1.64, and NB is 1.46v, but it's still not LinX stable. Loading at 77/78C, though. I'm pretty damn sure that the Mega's mounted right, but perhaps I need to remount the whole thing.
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