I hear you, I was just about to do that actually! Grew really frustrated over the matter
I reseated the ram sinks on the voltage regulators and added a fan on the accelero s1 to cool the voltage regulator heatsinks and got it stable. Btw. It was impossible to put 4 Enzotech 14x14x9mm ram sinks on the 4850 voltage regulators, they just did not fit! I ended up slapping em on the rams and using 3 of the accelero s1 own, slightly longer ram sinks on the grey voltage regulators.
Also one of the Accelero S1 heat pipes comes so near one of the rams that I had to bend the ram sinks (height 9mm) fins abit to make it fit.
Long story short:
After my rather unpleasent experience I would recomend either using the 4850 original reference coolers voltage regulator piece (as described above) or using heat sinks and a fan to cool down them. I installed a 80mm fan on the accelero s1 and with it came a stable card and the GPU load temps dropped from ~70c -> 60c on load too. Gotta give a 120mm fan a try
I would like to know my voltage regulators temps as they run extremely hot with passive cooling. On my case I needed a fan to get em stable, but as others suggest, the original voltage regulator copper heatsink should be enough in most cases. Depends much on the case air flow I guess. Some results to the end:
4850 GPU temps:
Accelero S1 rev2. Passive: Idle ~40c, load ~70c. Unstable.
Accelero S1 rev.2 and a 80mm fan: Idle 37c , Load 59c. Stable.
Originally Posted by sam0t
I hear you, I was just about to do that actually! Grew really frustrated over the matter
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