
Originally Posted by
dave87
Have you tried putting your machine under strain in other ways? Prime95 on all cores, folding on the GPUs?
If it does the same then at a guess it is related to load on the PSU, rather than the specific application running. If it doesn't, I'm not sure. Open Task Manager next time you start BF3, run for long enough to get the fan to ramp up, then have a look at the CPU usuage history - if your machine is running flat out, it may be drawing enough power to make the PSU think it needs more cooling.
As to why it doesn't ramp down afterwards, I think that may be an unrelated issue that gets triggered by the increased demand....