Pentium D 940 too hot...

[Sabian576]

Hello all, I have an issue I have recently put together a new computer, and my Pentium D 940 (Installed on a 975XBX) is running at around 67c...

Idle (I don't have any Load tests installed)

Processor temp: 67c
Internal temp: 39c.

(Above is acording to BIOS temp readings. These readings are the only ones I have, but I assume them to be accurate.)

Also Stock Heat Sink and Fan

when I first assembled this , I put it together w/ the Thermal Pad. and it was running at 90c!(Idle)

I then changed to Artic silver 5 compound and it dropped to 67c(Again Idle)

I am unshure of my problem to this point, so I came here, I have done nothing different then my first 3 builds (Other then change the componets slightly, of course) Can anyone help me out Please?

Thanx

[blue60007]

Did you get the pins/posts on the the heatsink fully locked in? It can be tricky to get in properly...you'll hear when it pops in all the way. You may have to remove the board from the case so you can keep the board supported as you push.

When you took the heatsink off the first time did it look like the thermal pad was good and squished out?

If those are just idle temps you are sure to have problems with a load. Hold off on installing Windows till you get this resolved.

[chuck4456]

They all run hot. It's the nature of the beast. Modify your case cooling - there will be some overall improvement.

[blue60007]

It should not be running 67C (or 90C! :eek: ) at idle (67C wouldn't be a huge issue at a full load though, but still a bit high). Even a poor cooling set up should cause it to run that hot (especially if you just turned it on).

[Sabian576]

thanx for the replys guys, I am 90% sure I have the heat sink all the way down. this is the first time I have used this peticular HS/Fan (My first intel build) any way, When I removed the heatsink to change to the artic compound the pad did not spread much at all, maybe1-2mm total spread. My immediate thought was just that, I did not get the HS/F tight enough. So I applied the compound and really pressed down on the pins to the point where I was concerned about cracking the Mobo. Also I pressed in the center of the fan while I was watching the temps and I could only get the temps to drop doen to the 64-65c range. So I don't think its that. (Though I'm no expert)

On the case cooling issue, I also don't believe its that. (though it could be I guess) I have 2 90mm intakes, and 2 60mm Exhaust + a controller with all on set to full speed, and the case has ok venting on the back and sides (sides not shown in picture from link below, but the case I recieved has side vents). The case is a 4U rackmount. (My Case (http://www.chassis-plans.com/rackmount-industrial-pc-computer-chassis/C3-4u-rackmount-atx-computer.html))

This computer is purpose built for my recording studio. so I had to have a rackmount case for various reasons.

anyway, do you think it could be anything else? I could pull the mobo but I just don't thinks that, but I am OUT of Ideas so if it comes to that I will. I dread it a little because the case has very little room. to get the mobo out safely I have to remove the drives a bunch of wire and a million zip ties. but...whatever i have to do I guess.

I also found this link (http://forum.pcmech.com/showthread.php?t=161797)

[minsonngo]

Caution: Too much thermal compound is not good either. You just need to apply a thin layer.

Maybe you happened to get defective heatsink/fan. If so, there are plenty of aftermarket ones available or you can see if the warranty covers it.

[glc]

You need to pull the board OUT of the case to snap the heatsink in properly. Otherwise the board flexes too much. Support the backside of the board firmly under the processor, push a pin down hard with your thumb till it goes SNAP - then twist 90 degrees right to lock it. Do the same with the pin diagonally across. The do the other 2.

[dogdude16]

if u do every thing mention above and its doesn't work ( which is should then u might want to look in to a good ligquid cooling system they dont do as much as most people think but they do work better then fans

[blue60007]

There is no need for water cooling. It's expensive and not worth it (unless you are into extreme overclocking). I agree it won't do as much as what you would think, it won't help that much over air... (extreme overclocking is th exception there).

Get the heatsink mounted like glc said and I think that will help. Your problems sound typical of a heatsink that isn't mounted right.

[Sabian576]

Thanks guys, I have located the problem. I pulled the MB as suggested and Found that one of the pins' Spreader claws/feet (Or whatever there called) had bent. (The little clear plastic claws that split when you apply pressure) One Had ended up on the top side of the MB and the other went through the hole like it was supposed to. I was unable to bend it back far enough to fit it through the hole again, so I just ordered another, slightly different HS/F.(This one (http://www.newegg.com/Product/Product.asp?Item=N82E16835185018))Its probably not the best one, but, I have used it before on my first build, and its doing alright 6 months later. Anyway once I get it installed, I'll report back with my temps. Speaking of which what is the range in which this peticular processor should run?

[kram 2.0]

After burn-in, the processor should be anywhere between 35^oC and as high as 50^oC on idle. At pretty high room temperature, I had a Presler run around 43^oC. It all varies on several factors including case air flow and general room temperature.

kram

[Litespeed]

That is very odd that the processor did not shut down. I use the same processor with stock heatsink and fan and run about 37-38 degress C. I would of thought at 67 to 90 the processor would shut down. I beleive the D 940 even has an add feature for heat protection. I will check it out when I get home.

[glc]

Intel sells replacement pins for the stock heatsink - they are 2 bucks for a set of 4.

http://www.shop-intel.com/shop/product.asp?pid=SIPS1052&pfid=116&pindex=1&mscssid=RGSVBRB72GJ58GHTM4E9FRVT5C9N2W9D

[Sabian576]

glc - thanx for the link. I already ordered the new one, it will be nice to have the ability to channel heat through tubes then have the fan placed vertical therefore alowing me to direct the heat out the back of my little case:D . I'll grab some new pins and just keep the stock as a spare.

[Sabian576]

litespeed - I am curious as well, Please let me know what you find, the more I can learn from you guys about this processor the better. I was unaware that it had any kind of heat protection.

[blue60007]

Just so you know, you are voiding the warranty on the CPU when you don't use the stock cooling.

[glc]

All Pentium 4's and derivatives have protection. They throttle down when a threshold is reached, if they get any hotter they will simply shut down. The throttling and shutdown thresholds depend on the exact processor.

[Sabian576]

Yeah, thanx agaiin for all the info everyone. I'm not really concerned about the warranty. if something happens to it, I'll just upgraded to a 950 or something. By that time conroe will be released (:D ) and all the others will be cheaper. Its just a recording computer, so if it goes down for a couple days, I won't care all that much - A good reason to take a break for tracking I guess.:cool:

[Sabian576]

Well, I ordered new pins and a new HS/F. (Linked above) I first installed the stock HSF with the new pins from intel. I got the temps down to 58*c (From 67*c) @ idle, so I tried thining out the thermal compound, but that only dropped 1*c extra, so I put my new HSF from Scythe on and was able to drop the temps down to 53*c @ idle, and it raises a little from there after a few of course. Thats still a bit warm, but What else can I do, I am 100% sure I have a the HSF fan mounted properly, took the Mobo out this time to be sure. the Thermal Compounmd IS thin enough, I did everything the same as my last few builds and they run fine, so I don't know at this point.