Q6600 on P5K Pro = junkyard? unstable, PLL

[Cronos]

Gigabyte boards with Load-line calibration enabled just overvolts CPU to have load voltages equal or higher to those set in BIOS.

On P5K-Pro and other middle ASUS boards load-line does nothing. Note that this does not really limit overclocking, but may confuse less experienced overclockers.

With BIOS 0806, P5K-Pro is an excellent value board and i think is the most optimal choice in all ASUS P5K line.

[Kyo`]

Well, the problem was solved as soon as I put the CPU in my old DS3R. Here is a screenie...

[ZOMGVTEK]

Wow... thats some low voltages.

This mobo worked fantastic for me, maybie try it on 400x9 like i have it, and set it to 1.500 in bios... test it like that?

And whats with everyones low temps and even core temps. My 2 cores are 9ºC colder than the other 2, and they can hit 72 on small fft's in a open case with 2 110cfm fans on a lapped TRUE 120 with a lapped Q6600.

[Kyo`]

But why should I throw horrific voltages on the cpu on that P5K, when clearly there's something wrong with it, since I'm running stable and low voltage on the DS3R :P The only drawback of this DS3R besides vdrop is that it can't handle more fsb then 440, I can go stable 9x400 but I prefere to keep it like this before I lap my TRUE and take care of the cooling properly (gonna throw in some photos later maybe). I don't think I'll decide to lap the Q6600 tho, would be a problem if I ever wanted to sell/rma it for various reasons

[ZOMGVTEK]

You must have some crazy setting wrong, it shouldnt be unstable. I can run mine at 4.2 long enough to run a 32m pi. And 1.5vbios is crazy voltage? lol... your voltage @ 3.5 is stil lower than my Vid

[Kyo`]

I was trying several different settings for whole 2 days so I should know how things were with the P5K Pro and I know that RMA was a reasonable decision. Well, 1.45v under load is crazy voltage for 3.6, considering the fact that top of the intel's voltage range for a Q6600 is 1.5v (specs from their website). Don't get me wrong, your chip is just a not-so-nice batch with a high VID, so that's not abnormal for it to run on such a high voltage if you want to achieve a 3.6 overclock. However, it sure is abnormal for my CPU - it's a L737 with a VID of 1.2125 after all.

Oh, and I've seen in some other topics that you have problems with temps. Well, main reason for this is propably the high voltage and not enough airflow in the case (it should be constructed in a way that when you close the case you get lower temps). Also, 25C is still a little high for ambient temp.
The difference in cores may be because of a faulty lapjob, or something is really wrong with the chip and you should RMA it.

[dnottis]

My DS3R had such bad droop it was an awful overclocker.

[Kyo`]

I know what you mean, it can be really annoying.

[ZOMGVTEK]

I was trying several different settings for whole 2 days so I should know how things were with the P5K Pro and I know that RMA was a reasonable decision. Well, 1.45v under load is crazy voltage for 3.6, considering the fact that top of the intel's voltage range for a Q6600 is 1.5v (specs from their website). Don't get me wrong, your chip is just a not-so-nice batch with a high VID, so that's not abnormal for it to run on such a high voltage if you want to achieve a 3.6 overclock. However, it sure is abnormal for my CPU - it's a L737 with a VID of 1.2125 after all.

Oh, and I've seen in some other topics that you have problems with temps. Well, main reason for this is propably the high voltage and not enough airflow in the case (it should be constructed in a way that when you close the case you get lower temps). Also, 25C is still a little high for ambient temp.
The difference in cores may be because of a faulty lapjob, or something is really wrong with the chip and you should RMA it.

Hmm.. Well i suppose if i had the possibility i would have RMA'd the board as well. And according to the table of Q6600 overcloks on here, 1.45 isnt that bad for 3.6. Theres some running 1.5 and up! And i dont really have a problem with temps, im just wondering why mine are much higher than others at the same clocks. The temps went down after lapping, so theres no problem there. And there was differences in the temps when i got the thing. And i got it from a place who wouldnt exchange a working processor.

The computer is in my closet, so it sucks back in its air quite often. I dont have any vents in there or anything, so it can hit 30ºC+ after 10 hours of prime. The core temps never really sway from 72. And i have 110 cfm panflows all around, 1 in, 1 out, and 2 on the cpu cooler.

Im not sure if the 2 cores are reading high? 2 cores read average temps for a lapped Q6600 at 3.6, and the other 2 are 9ºC higher.

[Kyo`]

Well, I don't know about tables, but what I do know that quite a few people run 3.6 on voltages below or slightly over 1.3v, some do 3.8 on 1.4v and a few even do 4.0 at 1.5v! It's all down to the batch, and mine is somewhat "legendary" in the Q6600 chip family, if I can use that word Anyway I don't really think it's wise running 1.5v and up on air cooling. Personally I just don't want to go over 65C @ CoreTemp if I aim for 24/7 usage.

I have two 14cm intake fans on the front (in the 5.25" bays) sucking air throught the front panel of my case (it's 100% mesh). Then I have another 12cm behind one of the 14cm blowing the air towards the TRUE, then on the TRUE I have two ZM-F3's in a push-pull configuration and right behind it there are two 8cm exhaust fans blowing hot air outside of the case. So it's like a wind tunel blowing in one line thru the TRUE and the other 14cm below blows air onto my other components like mobo and gfx. But still the gfx produces quite some hot air so I'm gonna install another ZM-F3 exhaust low on the side panel. Besides that I have a few mods in my mind including plexiglass, extra fans and case-cutting... so it's going to end up as one interesting and cold case

[ZOMGVTEK]

Hmm, well it looks like everyone is getting those temps on the normal settings of prime, and when i do that i get about 63ºC on my hotter cores.

If this one blows within 6 months, ill just get another... After a year i would want to upgrade anyways.

And im not running 1.5 and up, im running 1.440. It dosent sound that bad. Too bad i got a 1.300Vid

[Kyo`]

I know you don't but you said some ppl run 1.5 and up, just saying it's not really a wise choice if you don't have at least a solid water cooling.

[laragirl83]

Yes ofcourse I had those off. I'm just gonna RMA the board, it's clearly damaged, since now I'm running 3,5ghz on 1.264v stable on a DS3R.

U r a funny man... damn...
Just because u can NOT get higer OC with ur CPU u declared the MOBO damaged, and want RMA it...? pfff.... pathetic...
I hope the manufacturer wont find anything and will ship it back to you...
This is so lame...
If u CAN get a stable 3.xGHz, not to mention stock speed, there is nothing wrong with ur mobo, its your CPU that cannot go higher...

Q6600s CPUs can do 3.4-3.6GHz mostly, any higer ist just a question of luck (some very good batches, but they are rare...)

[Kyo`]

What the hell are you talking about, did you even read the whole topic before you started insulting? The only pathetic one in this case is you.
As I've said before, I couldn't even get stable on 3.0GHz on the P5K Pro no matter what I did, no matter how much voltage I pumped into the chip. You think 3.0GHz is a high OC and too much to expect from a L737B Q6600? And on the DS3R I'm rock-stable at 3.5GHz @ 1.296v with only the board and temps holding me back, so how can my OC issues be caused by the CPU? It was clearly a board problem, so I sent it on RMA, simple as that.
Oh ye, in case you didn't understand, DS3R = my old motherboard, the Gigabyte P35-DS3R.