Catalyst 10.7 scorching RAM on HD 4850!

[Meizuman]

Has anyone else seen this? My memory temps hit above 130 celsius with stock clocks! And OC'ability has gone down a bit. I have aluminium ram sinks on it and before the maximum temps were somewhere between 85-100 celsius. I tried to add a little fan but it didn't help at all. With 1100+ MHz, the mems go over 135 C!

I did see quite moderate FPS boost on NFS Undercover, but got OC crashes far more often and had to drop the clocks a bit.

Now on stock clocks the MEMIO shows 81 C on idle (1000MHz) and 75 C @ 750MHz

What is cooking? Should I just do something monstrous to the cooling side for the mem chips?

PS. The card is Asus EAH4850 (non-reference with the two mem chips at 45 degree angle)

[Ket]

Put some copper vRAM sinks on if you can, and leave it at that. As long as their not naked things should be fine.

[Meizuman]

149C in GPU-Z!!! Stock clocks! That equals a crash. Have to try and roll back to 10.6

EDIT: Tested 10.6, but didnt help much, maybe five degrees or something. There has to be something wrong in the airflow... back to the designing table...

[BeepBeep2]

Yeah, its not the driver. I put small alu ramsinks on my EAH4850 TOP and I ended up with 830 core / 1175 mem with core @ 55c and mem at 65c. (Voltmod and Scythe Musashi)

[Andi64]

Meizuman, the MEMIO temperature is not the temperature over the memory ICs but it's a part of the GPU die, like the IMC of a CPU. It's common on the HD4850 to be 5 to 10°C above the rest of the GPU die, depending on your cooling.

For example, I have 2 HD4850 on Crossfire, a Sapphire Toxic 675/1100 downclocked because of the MemIO and that CRAPY Zalman POS cooler to 625/1000 and a XFX HD4850 650/1050

At idle while the Sapphire is at 30°C GPU, the MemIO is at 35°C. On the other hand the XFX stays at 40°C GPU and 41.5°C MemIO. While gaming, at load the Sapphire goes to 60°C and the MemIO to 68°C, on the other hand the XFX stays at 60°C GPU / 64°C MemIO.
This on real game conditions.

If I start Furmark or something like that the XFX will climb some degrees but at some point it will mantain it and stop warming up, but the Sapphire reachs 92°C GPU, 114°C MemIO and in some cases fails. When I was running it at stock it could climb to 90+°C on the MemIO and fail in some games (yay Sapphire and Zalman POS cooler )

I was running 10.3 and now 10.7 but I didn't notice raise in temperatures. You should check all the temps inside the core, and the cooler on your card if it has dirt, and change the thermal compound.

[Andi64]

Edit: Holy double post, Batman. I don't know what happened!

[Meizuman]

Problem Solved! Not a driver cause.

[Andi64]

Can you explain how you solved it, so everyone looking for the same issue has an idea on where to start?

[saaya]

better cooling i guess

[Quad-Damage]

I have a 4850 with a S1 and a 140mm fan on it still crashes after long game play

[Andi64]

Did you cool the VRM? I had better results without heatsinks on the VRM that weak heatsinks.