Since your going with the AMD fpu already...you might think about upgrading to the a10-5800k. For about 50 bucks more you can get that and have it hashing at 7760 speeds. Also I have had real good luck with the biostar x85 board. Check out the differences between the gigabyte and biostar PCIe layout. Gigabyte makes good products...but.
I have never had good luck overclocking with them. Rock solid stock but any tweaking seems to go south in a hurry with that brand. YMMV. gl
zif
how fast does 7760 hashes at? Or specifically, in 5800k, how fast can it hash?