it's funny because i've post a topic about this... without any pci-e videocard (so the GPU into the CPU) my idle temp is arround 41-43 with the Thermaltake Water Cooling 2.0.
I've got from a friend 2 Radeon 5770 (little bit old but do the job I need), so the bios desactivate the onboard card, and guest what, the idle is now arround 49-51... I really don't understand, the air temp in the case are the same. And I just have 1 card right now plug into my computer. The temp of the "case" is 34oC (that what Speccy give me)
Weird thing, I think the software that check my temp is read a wrong value. If I stress the APU to the max, and go in the BIOS, the temp is arround 35-37... When I just load Windows 7, I get 49-51 (the soft is Speccy, because CoreTemp don't work with my APU, AMD A8).
Weird?!?!?!?