Too Hot Gpu - 5870

Ok so I know that there has been a lot of discussion about gpu temp in this forum, but my question is kind of different.

Background info: I had repasted with 0.5mm pads. Oced to 850/1200 at 1.10v

before repasting with the 0.5mm pads, running furmark gave almost 110c instantly and almost 100c for intense BF3 settings.

After repasting of course the temperature is great and with prolonged furmark, it is about 90-95c at the highest level.

I installed HWinfo64 to check out the temperature and I realized that the shader temperature is actually quite low with furmark at 80c! And so the high temperature that I saw from gpu z was actually the temperature of the memory, as confirmed by Hwinfo.

Is around 90c during games ok temperature for vram? There was 200mhz oc for the vram, but is there other way to further lower the temperature of the vram? Like I said, the gpu die runs very cool atm. There are threads that discuss how to lower the gpu temperature (gpu die), but not really the vram itself. I know some tried to use thermal paste instead of pads. I also know there are mixed review about this..

Thank you for your input. I was very surprised to see that the high temperature recorded by gpu z was due to hot vram, not the actual gpu die...

 

there have been many reports from people that the 0.5mm pads are too thin. You might have bad contact because the stock pads are 1mm on the 5870

What were your vram temps before you re-padded?

 

I dont know about the vram temps before re-padding, but with furmark, gpu z temp it was reaching 110c in matter of like 30 seconds... So I could not really see its final temperature. I didnt use HWinfo before repasting..

so that 110c has to be either vram or shadder, but I highly doubt that it is shadder since that means that there was 30c+ drop on shadder core. So I am suspecting that 110c was due to vram. In that case, the vram temperature has dropped significantly with the 0.5mm pad still as now it tops at 90-95 with furmark.

Does this make sense? I feel like 1200mhz is a reasonable oc, also with shadder that is around 80c... just trying to figure out a way to reduce the vram temp further..

I could try a better pad if anyone has a suggestion, but when I bought the 0.5mm pads, the thermal transfering index thing was quite high already...

Thanks.

 

Can you take a current HWinfo reading of your GPU? What are the DispIO, memIO, and shader temps on your card?

Are these the fujipoly's? They also make 1mm @ 6w/mk.

 

Idle (100Mhz) almost lowest it gets:
GPU Thermal Diode: 48 (whatever is the highest of the three)
DispIO:48
MemIO:45
Shadder:46

Furmark load and MAXIMUM TEMP:
GPU Thermal Diode: 92 (whatever is the highest of the three)
DispIO:79
MemIO:92
Shadder:80

Room temp probably around 20c...

I purchased this from PerformancePCs:
Alphacool Double-Sided Adhesive Pad 120x20x0.5mm

What do you think???

 

That isn't terrible for a 5870 cause they run hot

The highest there is the memio..this is the memory controller that's located right inside the GPU die, so the pads do not have an affect on this one. Its just what it is. The good thing is that in games, you'll probably not hit this temp. Furmark really heats it up

 

Thank you for clarying this up. I thought the memIO was the temp of the memory itself.. lol

But furmark only uses around 680mb 1080p setting in my case. so wont using over 1gb of vram during intense games that I run at 1600p end up having more stressed memio than furmark, hence higher temp??

 

No it shouldn't be hotter in a game...but to satisfy your curiosity, you could just leave HWinfo on in the background, run a game for 15 mins and then look at your max temps.

 

I wanted things at 85c max, but I guess then furmark 92c isnt so bad..

Thanks for your help!

 

np bro !