Bolt-thru heatsinks for socket 754/939/1207 will work. If you have some 754/939 retention frames and are willing to mod them a little, then clip-on heatsinks for 754/939/am2 will also work.

Basically the bolt spacing on these boards is the same as socket 754/939 (3.5"). Some Socket F boards come with 4.1" spacing, which will _not_ work with standard a64 heatsinks. But usually boards have both sets of holes, and the 3.5" (standard) backplate. I beleive this arima falls into this category [EDIT: looking at the picture, no it doesn't. Just standard 3.5" spacing...].