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i7 975 Extreme...what am I doing wrong? - Page 3

post #21 of 40
Quote:
Originally Posted by Mikecdm View Post
I think the 90°c was at stock clocks.

Some of these boards also have a "feature" that it drops clocks under high loads at high clocks. It basically dropped it down from 21x to 20x. I had to find a custom bios for my P6T7 that let it remain at high clocks. I had a P6T which also did the same thing, but since I never used it much, I never d/l the custom bios for it.
That's not a "feature"
...It's a overheating protection mechanism built into the CPU.

Unless you're referring to C1E..?
post #22 of 40
Some things to pick up would be:
  • Some good heatsink compound, though I hear the Hyper 212's compound is pretty good.
  • Some isopropyl alcohol >70% alc by volume. This will let you clean the CPU's surface prior to putting heatsink compound on it.
  • Get coffee filters! The paper ones from a store are lint-free for the most part and don't leave a residue.
  • You might want to also snag ArctiClean.

The way I usually use ArctiClean is:
  1. Use the white-capped one (number 1) to de-gunkify the old heatsink compound. The stuff really gets in there and just wipes off using a coffee filter.
  2. Once the CPU surface is totally clean, use the blue-capped one (number 2) to do a preliminary prep of the surface. Again, use a coffee filter.
  3. Finally, I use the aforementioned isopropyl alcohol to really clean the surface and get it ready. Again, coffee filter.

You can do the same for the base of your heatsink, but if you're using it out of the box all you really need is the alcohol with, of course, a coffee filter to clean it.

I also recommend washing your hands before, during, and after heatsink compound sessions; use soap and not-quite-piping-hot water. This will help keep oil on your fingers from affecting your CPU or the heatsink application, since you're going to have to hold the CPU in one hand while you clean it with the other.

During? Your fingers WILL get messy. I've had it happen, and the last thing I want to do is contaminate anything so I'll carefully get everything in a safe spot, go wash up, then return to my task (e.g. if I'm cleaning off a CPU, the old heatsink compound can get pretty grody when it's still a slurry due to the ArctiClean).

After? same deal, you don't want heatsink compound junk all over your fingers, do you?

Rubber gloves might also be a good idea if you're very concerned about this - and TBH I would invest in them as you have a 975, which is a very expensive CPU.
Edited by Quantum Reality - 4/17/11 at 9:52am
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post #23 of 40
Quote:
Originally Posted by kiwiasian View Post
That's not a "feature"
...It's a overheating protection mechanism built into the CPU.

Unless you're referring to C1E..?
I'm not referring to C1E and it's not even a selectable option in the bios. The P6T boards just do it on their own. I ran my 920 on the P6T7 at 4.4ghz, once I put any load on it, the multi would drop to 20. It wasn't over heating and it had sufficient cooling. After flashing the custom bios, it no longer did this. I know there is a similar bios for the P6T/deluxe that does the same thing.

I'm not saying this is the issue, but it's something to consider if it continues to do it once the OP gets a decent cooler. I also don't know how the board acts with an EE chip.
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post #24 of 40
Quote:
Originally Posted by kiwiasian View Post
That's not a "feature"
...It's a overheating protection mechanism built into the CPU.

Unless you're referring to C1E..?
It's called multiplier throttling and it's a known problem with P6T's. Pick up Throttlestop to prevent throttling on all Asus X58 boards:
http://www.xtremesystems.org/forums/...d.php?t=227689

Solved my issues when using any multi higher than stock on my 980X.
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post #25 of 40
Here's a video showing a guy using ArctiClean to prep a heatsink.

You can see that the ArctiClean 1 indeed makes a slurry with the original heatsnk compound so you can expect it to be a bit of a messy job removing the old compound, especially if you haven't got Qtips.

Note, however, that the lack of use of ArctiClean 2/alcohol as well as the way he applies the heatsink compound is NOT RECOMMENDED by the manufacturers of ArctiClean, and indeed anyone here would likely also agree that after AC1 they would use AC2 or at least isopropyl alcohol to do the final prep.

It is also generally recommended to put heatsink compound on the CPU, not the heatsink, unless using a heatpipe direct touch model.

There is also one other exception - Arctic Cooling heatsink/fan combos often come with MX-2 pre-applied. Do not touch this material; prep only your CPU, and simply pop the heatsink directly onto your CPU.
Edited by Quantum Reality - 4/17/11 at 12:09pm
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post #26 of 40
i cant believe he overclocked on a stock heatsink...let alone do it without testing temp...
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post #27 of 40
Quote:
Originally Posted by Coolwaters View Post
i cant believe he overclocked on a stock heatsink...let alone do it without testing temp...
We aren't here to criticize. We're here to help. So post something useful or ****...just sayin.

Kweechy, in regards to what cooler to get HERE is a good graph showing the H70(Easiest water cooling) and Thermalright Silver Arrow(best air cooler)
post #28 of 40
Thread Starter 
Quote:
Originally Posted by Coolwaters View Post
i cant believe he overclocked on a stock heatsink...let alone do it without testing temp...
I disclaimed that I'm a complete and utter noob, don't know what else to say here. I have the 975 Extreme edition and had heard it was pretty receptive to a 20-30% OC on stock parts. I think maybe my case was a bit dusty and that was affecting the temps as well. I joined this forum to learn from folks much smarter than myself.

Anyway, that having been said...

I went and bought a Corsair H70 today. I am pleased to say that I have now made my first ever stable OC'd computer! My 975 is happily running @ 4.2ghz without exceeding 75 C temperatures.

My test render file takes approx 8.5 minutes on my stock settings and I just rendered it in 7.25 minutes. This is great!

The odd thing is that on boot, my BIOS tells me there is a CPU fan error. I tried swapping the plugs for the pump and fans to no avail. Interestingly enough it seems to be working quite well as Prime95 couldn't even get my temps above 82 at 4.2ghz and full load. Is my P6T just lying?
Edited by kweechy - 4/17/11 at 1:07pm
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post #29 of 40
Oh, your BIOS probably has a setting to check if a fan is registering any RPMs at all. You should be able to switch that off somewhere, since you don't have a CPU fan anymore.

EDIT: If I were you I'd switch off all smart fan control and just let everything run full-out and really let that H70 shine.
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post #30 of 40
Thread Starter 
Will give that a try, thanks for the great feedback everyone. This has been extremely helpful.
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