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HD 4870 Aftermarket cooling VRM overheating?

post #1 of 10
Thread Starter 
I just installed Arctic Cooling Accelero S1 Rev.2, I also mounted the little heatsinks that came with it.
http://imageshack.us/f/225/hd4870ip1.jpg/
This isn't my picture, but you can see where it's circled, I used the heatsinks that came with the cooler to put on there and the two chips above. My problem is that in gpu-z the temperature of the VDCC phase #1 , 2 and 3 get to 136C when running FurMark eek.gif

I don't know what temperatures it reached with the stock cooler, because I never really checked :/

The cooler did an excelent job cooling the gpu and vram, but vrm's are ridiculusly hot confused.gif

Also, are the Zalman ZM-RHS1 heatsinks any better then the aluminum ones that came with the cooler? I really don't want to put the stock red cooling plate thing back on because my vram temperatures went from 110C to 62C with the little heasinks that came with the cooler. The only problem are the VRM's frown.gif
Edited by markothevrba - 7/26/11 at 12:39pm
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post #2 of 10
Quote:
Originally Posted by markothevrba;14354685 
my vram temperatures went from 110C

WHAT??

Anyway, how do you know the VRM temp? My 4870 didn't have a VRM sensor
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post #3 of 10
Hell, I use the stock cooler with Zalaman Copper Ram-sinks on the VRM's and they don't get hot at all. I Have my H50 Push/pull with strong fans that blow over the VRM's first and then the cooler itself. I like My 4870 1GB, but I just need to go back to Nvidia for a few reasons. XD
post #4 of 10
Why was your vRam 120C in the first place? I never had such issues with the stock cooler confused.gif
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post #5 of 10
Thread Starter 
Idk, it's weird :/ I am thinking of trying to put on the stock red plate thing, but the thermal pads that kept contact between the chips and the plate are all crumbling, so should I just put some thermal paste on to fill the gaps or should I go looking for new thermal heat pad thing?

EDIT:

Sorry, maybe I was wrong, which of these is the VRAM?
3gh.png

I meant, that the GPU Temp (MEMIO), DISPIO and SHADERCORE were all over 110C with the stock cooler.

But I don't remember what the VDDC temps were on the stock cooler. Does anyone have this card with stock cooler and what are your VDDC temps?
Edited by markothevrba - 7/26/11 at 2:16pm
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post #6 of 10
Thread Starter 
Ok, so I reinstalled the original "red steel plate™" and the temps in FurMark went from:

136C (and rising 2 mins in-canceled test) to
94C (5 mins in).

Also noticed that because of the awesome plastic spacer thingies the gpu wasn't fully covered in thermal grease (quarter of it was dry :/), so I removed them. Just had to watch out to not tight the screws too much.

So now my temps are bareable and I got a silent cooler that cools my GPU much better smile.gif - 55C max load (FurMark) minimum fan speed
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post #7 of 10
55C is indeed a very good load temp. The stock cooler was giving me 78-82C depending on ambient. Maybe Powercolor cheaped out on it, if it reached 120C, mine was Gainward..
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post #8 of 10
Thread Starter 
Yeah. But I never really tinkered with the fan, it was just do damn loud. Now this on the other hand is whisper quiet, well not whisper yet since I got the stockest of stock Akasa fans redface.gif
But I am planning on buying 4 noctua fans, for the back of PC, for CPU cooler and 2 for GPU cooler. Then I will have a silent PC. I would already buy it but it's not that small of an investment counting that I have to pay 23€ for 1 fan frown.gif But it certainly is a good investment, since I get one of if not the best and most silent fans that don't get loud after 2 months (like akasa's do mad.gif) and they have a 6 year warranty which is always nice.
Only thing that sucks is the color... brown fan anyone? rolleyes.gif

Maybe I will post a full load screenshot, but I really don't feel like cooking my card anymore with FurMark, because this program is like Hitman for video cards biggrin.gif

Oh, and no, Powercolor didn't cheap out on it, it's a very good cooler, it's just the fan that's annoying... The card was very cool with fan at 30-40%, but I hate the noise
Edited by markothevrba - 7/27/11 at 9:50am
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post #9 of 10
you are supposed to cool these ones too(green)
hd4870ip1.jpg

Uploaded with ImageShack.us
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post #10 of 10
Thread Starter 
I know, many people forgot those, but I didn't. I had the little coolers on there, but the temperatures were still mad. Now I installed the red plate thing back, and it's 96C on FurMark, so I reckon it's no way it will get over 100C in games, let alone 120C which is the VRM limit.
BTW, by red plate I mean this thing (not my picture)

DSC06648.jpg


One more thing I would like to ask. In GPU-Z, the temperature of GPU Temp (MEMIO), is this the memory that's in the actual GPU or is this the temperature for the 8 chips that are around the GPU?
And if this is the temp for memory in the GPU, where's the temp for the other 8 chips?
Edited by markothevrba - 7/27/11 at 1:35pm
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