Just purchased a GA-MA78GM-S2H rev 1.1 motherboard, and I am having some problems with it. I also have an AMD athlon 64X2 5600 2.9 GHz 1MB l2 cache 65W processor and 2x2gig corsair RAM. While trying to install vista ultimate 64, it will freeze, usually at or right before the gui portion of the install (after loading windows files). By freeze I mean that the mouse cursor + timer are unresponsive, dvd drive stops spinning, etc. I ran memtest 86+ and the RAM appears to be good, i also tried booting with each stick separately and got the same results. The BIOS version is Award 6.00 PG, F5. Any help is appreciated. If you need more specs, I am happy to give them.
I have the same mobo and was recently trying to update to Win 7 64 bit with the same issues. Did you ever get a resolution for this?