Didn't look up the motherboard but I assume it has enough pci lanes for the cards. The only thing to be careful with is your PSU's I was watching a guide a few months back, and you need to use some cap on the 24pin of the second one, and link them so they turn on simultaneous and stuff like that. I can't really help you with that but the set up should work.
But yeah just keep that in mind with the second PSU when you get there.
Also not to say GPU mining isn't worth it for bitcoin. Its going to be not worth it for Scrypt coins very soon too. Due to ASIC's for scrypt now being released. Your rig will be fine for Scrypt-N factor and Jane and X11 etc however I recommend 16GB ram for your set up if looking to mine those.
But yeah just keep that in mind with the second PSU when you get there.
Also not to say GPU mining isn't worth it for bitcoin. Its going to be not worth it for Scrypt coins very soon too. Due to ASIC's for scrypt now being released. Your rig will be fine for Scrypt-N factor and Jane and X11 etc however I recommend 16GB ram for your set up if looking to mine those.
The motherboard does have enough PCIe lanes. I will be fine with 1 PSU but I probably will use add2psu when I add another.
GPU mining is definitely not worth it for Bitcoin. I would lose ~$300 annually. I am aware that scrypt ASICs are coming soon but when that happens I'll probably switch to another cryptocoin algorithm such as Scrypt-N or some other ASIC resistant algorithm. For scrypt I should be fine with 8GB of RAM but if I need more then I can buy another 8GB stick. My motherboard supports up to 16GB. (I changed my plan for getting RAM. I am getting a single stick of 8GB ram instead of 2x4GB)