Just this weekend, I picked up aftermarket cooling for my 5850s. I spent several days searching for all the good VGA coolers I could find with the requirements that it
a)is less than 35mm thickness so it won't occupy more than 2 PCIe slots
b)is quiet
c)can be optained locally
My results were that I had 3 options:
Scythe Setsugen
Zalman VF1000
Zalman GV1000
I checked out some reviews and generally the Setsugen was rated about the same or better than the Zalman VF1000. The GV1000 actually would have been my 1st choice but they only had 1 open box left so I could then only get VF1000 or Setsugen. They appeared to perform very equally from what I could find so I finally decied to get the Setsugen.
The good: Very quiet
The bad: Stock VRM heatsinks come with crappy tape. I ended up having one fall off while running which broke 2 blades off the fan. Luckily I was able to exchange it for a new one... and I bought Arctic Silver thermal adhesive. After putting it all back together with the adhesive, I ran some testing. First of all, these are super quiet even at highest fan speed. But, there's currently 2 issues I have.
The first is that the top fan blows hot air down into my 2nd cooler, which ends up running up to 8 or 10C hotter. I've read that it's better to flip the fan around so it blows towards the PCB - I'll give this a try.
The second issue is that the cooling seems insufficient. In gaming (STALKER: CoP and StarCraft 2 so far) the temps are fine in the 60s, but running FurMark gets the temps to go up and up and up... in the 80s on my lower 5850, the VRMS are much higher than that even and then it BSODs (GPUZ, if I read it right, showed ~110 or 120C)
Now, I would probably bring them back and give the Zalman VF1000's a try but I used the thermal adhesive... I don't get the feeling that glue will be coming off easily. Not sure what I can do about it now...
The point: It's a decent cooler and very quiet, but it is flawed. The GPU cooling is alright and acceptable for gaming temps but at this point the VRMs are just over heating. Hopefully flipping the fan around (which will be a great deal of troubly) will help to solve this issue.
a)is less than 35mm thickness so it won't occupy more than 2 PCIe slots
b)is quiet
c)can be optained locally
My results were that I had 3 options:
Scythe Setsugen
Zalman VF1000
Zalman GV1000
I checked out some reviews and generally the Setsugen was rated about the same or better than the Zalman VF1000. The GV1000 actually would have been my 1st choice but they only had 1 open box left so I could then only get VF1000 or Setsugen. They appeared to perform very equally from what I could find so I finally decied to get the Setsugen.
The good: Very quiet
The bad: Stock VRM heatsinks come with crappy tape. I ended up having one fall off while running which broke 2 blades off the fan. Luckily I was able to exchange it for a new one... and I bought Arctic Silver thermal adhesive. After putting it all back together with the adhesive, I ran some testing. First of all, these are super quiet even at highest fan speed. But, there's currently 2 issues I have.
The first is that the top fan blows hot air down into my 2nd cooler, which ends up running up to 8 or 10C hotter. I've read that it's better to flip the fan around so it blows towards the PCB - I'll give this a try.
The second issue is that the cooling seems insufficient. In gaming (STALKER: CoP and StarCraft 2 so far) the temps are fine in the 60s, but running FurMark gets the temps to go up and up and up... in the 80s on my lower 5850, the VRMS are much higher than that even and then it BSODs (GPUZ, if I read it right, showed ~110 or 120C)
Now, I would probably bring them back and give the Zalman VF1000's a try but I used the thermal adhesive... I don't get the feeling that glue will be coming off easily. Not sure what I can do about it now...
The point: It's a decent cooler and very quiet, but it is flawed. The GPU cooling is alright and acceptable for gaming temps but at this point the VRMs are just over heating. Hopefully flipping the fan around (which will be a great deal of troubly) will help to solve this issue.