Yeah, that is mighty compact, with just about everything you need as far as video outputs... 

You'd think they would not make something like that if thermal specs were bad, but then you look at xbox360...   I got a Ice Cube PC with a Sempron 3300, and it's pretty small too.  The CPU fan is on high all the time, and there is a lot of heat generated by this unit.  I need to take it apart again and install the tunnel for the exhaust, I forgot to put that in, and it will help tremendously...  I also had to cut a hole in the plastic on the left side panel for the graphics card I used.   There are air holes all over each side panel, but they are covered with plexi-glass, and the Graphics card has to have the air-flow, so a dremeled a square hole for it.

Air-Flow is the key.

Yeah, but then you are tailoring your use around the design and or fear of the case cooling properties.  If you get a Quad core, and are afraid to run it, then that defeats the purpose.   You said: "provided I didn't run something that would use a lot of GPU for any long length of time."  Well, right there you are going to allow the fear of heat specs to dictate how you run your PC, and it should not be that way.  There are plenty other SMALL motherboards out there what would be better for you, as you seem not to even need the ability to run four cores, and will not even fully utilize two cores either...  If it is portability you want, and a single core CPU will do the job, then by all means...

I run them as they are designed and said to run, and if there are problems, the MFR will be responsible for the failure, because they said it all works together; and, I will return it to where I bought it.  The reason they make those SMALL boards is for those small enclosures, so they have to know that a small board like that, in a SMALL case with a quad core CPU would be ok.  Though, I again refer to XBOX 360, where the GPU is actually the problem; we would hope people learn from that.

My "Ice Cube" has been on 24hrs a day for about a month now, it is a media server. Summer isn't even here yet, so I have to wait.  Still, the CPU is never tasked, because it only has one APP running, the PS3 media server, and the CPU FAN is always on high.  I disable CPU throttling on all my AMD products, just not this one yet (small app).  It only CPU% only jumps when I unrar a MKV then convert it with MKV2VOB, and that's it.