Oh hi, im new too tom'sHardware. Ive got an little bit of an problem with my new ASUSTeK M5A97 R2.0 motherboard, yeah the temps... My idle temp is around 40 - 50 C, wich i think is a little bit too high. my mobo temp after running Prime95 for 5 mins is 60 - 70 C.
My chassi is an CoolerMaster silencio 550 with the stock chassi fans. An Artic cooler freezer 7 pro 64 something as CPU fan. The CPU is a AMD FX-8120 BTW.
I was wondering how i can get my MoBo temps down a little, I got only 1 chassi fan space left.
You should try re-seating your CPUs heatsink and reapplying thermal paste first. Adding a chassis fan or even upgrading all of them won't bring down the temps that far from 40-50C. Take off your heatsink, clean all the thermal paste on it and on the CPU. Then, apply a small dab of it on the CPU and place the heatsink carefully. Make sure all the pins and screws are popped in and / or screwed in tightly.
Lack of VRM cooling likely to blame. I say this because I own this board, and have recently had to downgrade temporarily from a higher end or more OC'ing focused board. I noticed my OCing hit a big wall very early, and It is I think from there being no heatsink for the VRMs (located near the CPU toward the IO shield (behind the long row of sticking up squares or MOSFETS if your familiar) I wish I had better advice, beings I would say pop a old / extra / buy a Heatsink or something, but there is stuff in the way of even a very skinny heatsink.
The Cooler Master Silencio 550 has only room for three 120mm fans. The stock fans are locked at a slow 800 RPM. I would use all three available spaces and replace the stock fans with ones that move more air.