The Atom D510 CPU and GMA 3150 graphics
. Thats a very weak GPU that struggles with HD content (even some YouTube HD) and usually not considered suitable for Blu-Ray.
You'll want to look for Atom + ION
or ION 2 graphics
Foxconn R10-G3 and G31 GMA 3100
. Isn't much better in terms of HD content playback.
Look for a minimum of GMA X4500HD
One option would be a Clarkdale CPU with it's integrated HD graphics. Biostar Eco i2 Barebone 1156 Intel H55 motherboard
and Pentium G6950 Clarkdale 2.8GHz
The stock Intel CPU coolers almost always fit in the small cases designed for the Intel CPUs.