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Ways to cool an ASUS CuCore ATI Radeon HD5770?Follow

#1 Aug 07 2010 at 11:10 PM Rating: Decent
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Granted I haven't owned this card very long I'm concerned if this is a normal temp for my card to be running at. I have an ASUS CuCore ATI Radeon HD5770 1GB GDDR5 128-bit card. Very recently I've come to find when running the FFXIV benchmark under low settings my card runs extremely loud and hits temps of 105c with fan speed reaching 100%. The card isn't overclocked either, otherwise the card just reaches temps of 90-95c when running it. Soon as the benchmark's closed the temp drops down into the 50's before idling around 43-45c. My case has a 120mm fan towards the bottom blowing air across my two HDD and to the video card but there's an issue of several cords being in the way. Unfortunately there's next to nothing I can do about this due to the layout of my system. I've done my best to try clearing a path but not much more I can do. Additionally, I've got a small 80mm fan mounted on the side to bring air in blowing over the video card. It doesn't seem to help much really...

I've thought about buying a PCI slot fan and mounting it under the video card to suck air out but I don't know if that may make problems worse. My case is well ventilated with slotted plate covers in the rear and plenty of room in the inside. Overall I've got two front fans, one rear, and one side with CPU temps sitting at 30-50c even under full load and overclocked.

Edited, Aug 7th 2010 10:12pm by SamusKnight
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#2 Aug 07 2010 at 11:41 PM Rating: Decent
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Everything I see about that card says under full load, the gpu should be around 70-75C. Don't know what is wrong with yours, but if you just got it, I'd suggest returning/exchanging it.
#3 Aug 08 2010 at 3:19 AM Rating: Decent
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Unfortunately an exchange/return is a no-go... I purchased it from an eBay user so I'm stuck with it. Apart from the high temps (Actually somewhat common but still too high than what it should be.) the card doesn't have any problems. I've removed the heatsink and fan from the card and applied some artic silver 5 to it and it seems to have helped slightly. The one issue I HAVE noticed however is that the heatsink isn't completely flat. At the very center it comes to a slight point, I'm betting it's not making full contact with the VGA chip because of this. Would buying an aftermarket cooler to replace my card's cooler work?

And by the way, running Guild Wars in full screen with v-sync on drops the GPU temp to about 75-77c. Current room temp is about 80F with my window open. I've noticed that despite having a lower fan there doesn't seem to be much air circulating around the bottom of my case. Plenty above but very little at the bottom. The bottom fan on the front of my case is running at a rated 1404RPM right now.
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#4 Aug 09 2010 at 9:37 PM Rating: Decent
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ya there is something wrong with your card ASUS seems to be having overheating problems (my friends HD 4850 has a similar problem). I have a XFX HD 5770 and overclocked to 960/1375 and running FFXIV benchmark on high setting I only get to about 70-72c oh and the fan never goes above 40% so there is definitely wrong with your card. You can try an gpu cooler and see if that helps
#5 Aug 09 2010 at 9:48 PM Rating: Excellent
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You have 2 options if the heatsync is not flat. 1, you can get some really fine wet dry sandpaper and a very flat block of some sort, prefferably metal or hard plastic, and "lapp" the block, essentially sand it completely flat and smooth. This takes a fair bit of time and some skill.

Option 2 would be to consider an alternate cooler. I'd reccommend water cooling if you go to the trouble. You may be able to find something here that will do the trick. http://www.performance-pcs.com/catalog/index.php

You may also want to look at your computer case. 95c under load is wayyyyy high for that card. I'd suspect in addition to the video card heatsync you have a fan flow issue. check and ensure that you have adequate clearance around all sides of your case (minimum 2 inches) and that the front fans are blowing air in, and the rear fans are blowing air out. You will need an absolute minimum of 2 120mm fans to keep that video card cool in your average case. more is better.

Just in case you don't already know, to check fan flow direction, look for the bracket the rotating part of the fan is attached to. the bracket is always on the rear of the fan, and that is always the side air comes out. If you have one of the fans swapped, you can set up an odd pressure situation and end up with almost no airflow over critical components.

The other thing you might be running into here is a card with a bad component in the voltage regulator that is needlessly overheating. Rare, but could happen.
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#6 Aug 11 2010 at 1:18 AM Rating: Decent
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I found out it was the heatsink. After sanding it down I dropped the temperatures by about 20c. Unfortunately under heavy load it still gets hot, upwards of 85c but I have a feeling the heatsink isn't fully flat still which is the problem. Currently I don't have the right sandpaper needed (I could only get 600 grit paper) so I couldn't do a thorough job. This weekend I'm going out to find some 1000 grit paper to finish the task. Also, a question... After sanding down the heatsink I've come to notice that under load the card makes a strange "buzzing" sound. It doesn't seem to be causing any issues however, and with the side panel on I really can't hear it. But any idea why it's doing that? As the temperature rises the buzzing gets louder, mostly when running the FFXIV benchmark. I've checked the fan and it still makes the noise even if the fan has stopped running.

EDIT: Oh and I do have dual 120mm fans on the front for intake. My CPU sits at a cozy 34-36c when idle and around 47-48c under load. Core temps go about 10 degrees higher than that but it doesn't seem to cause any issues either. And that's with my CPU overclocked from 3.0GHz to 3.6GHz. I've also got a 80mm intake on the side blowing air directly on the video card at full speed since it's connected to a 4-pin.

Edited, Aug 11th 2010 12:21am by SamusKnight

Edited, Aug 11th 2010 12:29am by SamusKnight
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