I set out to make a new HTPC that could do double duty as a light gaming rig, all wrapped inside an old NES case I ahd lying around. I had high hopes for the A10 APU, but heating issues keep it hamstrung: I'm forced to run it at the 45W configuration instead of the 65W. I could improve ventilation by cutting up the top of the case for better airflow, but that defeats the point of putting the whole thing in an NES.
I did add 40mm fans to each side of the case, and I rewired the power switch from the NES to work with the mobo power. I wish I could have set the mobo lower in the NES, but the power switch is in the way and difficult to move. I also ended up having to use some lego bricks wedged up against the mobo to keep it stable. If I could do it again, I'd mount the board upside down and cut better venting on the underside.
As an HTPC, I'd rate my satisfaction a 9/10 due to some minor volume issues over the HDMI. As a steam machine, it can run casual titles like Bastion and older games like L4D2 just fine, and Steam In-Home Streaming is great. Sadly, it's little 45W heart can't run Bioshock Infinite for more then a few minutes, even on lowest settings. I'm debating swapping out the Noctua NH-L9a and replacing it with an all-in-one liquid CPU cooler and hanging the radiator out the back. Besides the NES case holding back it's gaming potential, I'm satisfied with the build.