For everyone havin problems with heat on the aspire 5750g:
I had the same problem. The fan just doesn't kick in at max before the cpu reaching 96-100c. My gaming performance suffered as well, probably because the gpu or cpu clocked down because of the heat. CPU and GPU are on the same cooling array.
I had disabled turboboost because of this, and lost some fps, and gpu did not achieve full usage.
Anyways, the new BIOS, version 1.19 did something. It seems as thou acer finally got their *** togather, so with the new bios the laptop doesnt spit flames anymore. Allthou it does get hot.
I was seeing temps in the 96-98c for cpu and 89 for gpu playing skyrim. With the new bios, i never got over 90c on the CPU (normal 87c), and the gpu also is much cooler. Togather with a homemade cooling pad, temps never go beyond 86c for cpu and 80c for gpu.
Note that idle temps will stay about the same. My guess is that the temp threshold has been set lower with the new bios, so the fan starts doing its thing before any throttledown occurs. Even with a cooling pad, the idle temp is the same, probably because the internal fan just shuts down.
This even made me able to overclock my gpu (gt 540m) to the same clock as the gt 550m (same chip), and the maximum temp did NOT get affected! happy tiimes
http/support.acer.com/product/default.aspx?tab=5&modelId=3475