2012年4月27日金曜日

New computer, video card running hot?

I recently got a new computer and everything works fine besides when I plug in a PCIe video card. I have tried multiple videocards and all of them run really hot just sitting at the desktop. One was running at 100 C! The power supply is a 500 watt and none of the video cards I tried require anywhere near that amount.



The motherboard has 2 PCIe slots and I have the problem on both slots. The onboard video works perfectly fine. The case has the side off and none of the other components report any heat issues. I don't think airflow is a problem. The video card fan is working on all the video cards I tried. The video cards also worked fine before this new computer. I used HW Monitor by CPUID to check the temperatures. I have made sure all drivers are updated and properly installed. The OS is fresh as I just formatted and installed windows 7 today.



I have searched around and have found no answer. Any Ideas?|||>It sounds like you are doing everything right. This makes it difficult to try and troubleshoot the problem.



If it is not airflow, you are having the problem with multiple cards and the case side is off, then there could be only two possibilities:



Either the motherboard is defective, basically, the PCIe slot is defective, or it could be a capacitor on the motherboard the is the actual cause...no way to tell without having the board plugged into an oscilloscope and you would have to have the electronic circuitry diagrams.



Second potential cause is probably more the power supply itself. It is possible that the power supply is defective and actually sending more voltage to the video card than what is required...or the second problem could be that your power supply is inadequate for the power requirement needs of the card(s) and is overworking itself trying to keep up. If it is being caused by this, you can expect the power supply to burn up and cease functioning.



In either case, I think you have a serious issue with one of the electronic components that is common to everything. Those two possibilities, one of them is probably the issue - either the defective motherboard or the underpowered power supply or a defective power supply that is producing more than the regulated 12 volts. You could buy a small multimeter and then test the voltage coming out of the 6 or 8 pin power connectors to see if you are getting mroe than 12 Volts. That might be away to eliminate an over-voltage situation, but it stil doesn't say how many volts are being supplied if your power supply is under rated and is working overtime. One thing might be to unplug the computer right after running it for a while and just place your hand near the power supply and see if it is hot itself. If so, I bet you that you have an underpowered supply and the cards are going to burn that underpowered supply out.



If none of that is the cause - it may just in fact be a bad motherboard with one or more capacitors on the PCIe bus that is malfunctioning.|||Try using this Sidebar Gadget to double check the temp reading. It is what I use to monitor my GPU. Check out the link below. I use #3 because I run both ATI and Nvidia cards. Hope this helps. Good Luck.



http://windows7themes.net/windows-7-gpu-…|||Try this program:

http://www.techpowerup.com/downloads/Sys…

Look at the temp, if its still that high then id blame the cards since you have covered all of your bases with airflow. You sure the fan is spinning?|||Where did you get the 100C reading from? Sounds like a false reading to me. If the fan on the card is working then there's no way the card should be that hot at idle. Perhaps after a couple of hours of gaming at 100% GPU load it might reach 100C but not when it's doing nothing at all but displaying your desktop.



If its a Radeon card, load CCC and check the cards temps using that.

For an NVIDIA card, use nTune to check the temps of the card.



Modern cards are build to withstand extreme temperatures, even up to 110C but even so, that's too hot. That sort of heat is going to make the ambient temp in the case very high. Not good.



You could try what i do with my 6970. I use CCC to manually set the cards fan speed to about 50% when gaming. It's a little bit loud but who cares when there are cool explosions and shotgun blasts to listen to when gaming.

Manually setting the cards fan speed keeps the card at a decent temp all the time, instead of having it on auto. When my card is on auto fan control, the temp goes crazy, then the fan goes crazy to cool it down, then the fan slows a bit and the temp goes up again, then the fan goes crazy to bring the temp down. I don't like the constant fluctuation of temps like that and i find that manually setting the fan at 50% keeps the card nice and cool all the time.



then when i'm not gaming i just lower the fan speed to about 30% because the card doesn't get hot when not gaming and 30% is quieter than 50%|||I suspect you are getting false (greatly inaccurate) temperature readings. You should be close to 70C or so after gaming for several hours. Idle should be closer to 50 or 60C. If you are reading 100C, I would suspect that is a false reading.



BUT, something you need to understand (and not too many people do) is that the primary purpose of the case is to DIRECT airflow, for cooling purposes. The goal of proper system cooling is NOT to keep the air inside the case cooler (although that helps), but to ELIMINATE HOT SPOTS. In order to eliminate hot spots, a properly designed case needs to be closed.

If you have the side of the case off, that WILL cause your video card to run a little hotter. Although the interior of the case is "cooler"...there is also less airflow past the video card area.



Case open...cooler air, but disrupted airflow

Case closed...warmer air, but proper airflow = overall better cooling



I'm sure you've noticed that if you are outside on a breezy day, it can FEEL colder than it actually is, right? Same concept. Your computer will be better cooled if the case is CLOSED. Assuming your case is designed properly.



I'm sure your video card will be cooler once you close the case. Unfortunately, I believe you will still get false readings of temperature. I personally wouldn't worry about the high temp. reading on the video card (probably WRONG) unless you had other symptoms of over-heating. Like, if the video locks up shortly after starting a game or something like that.



Oh, and close the case. :)

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