Catalyst 10.7 scorching RAM on HD 4850!

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)

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

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...

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)

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 :D )

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.

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

Problem Solved! Not a driver cause.

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

better cooling i guess :D

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

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