I am wanting to crossfire 2 Asus Radeon 4870 Dark Knight editions, will this PSU do the job and will it be futureproof enough if I later CF 69xx? I am new to crossfire, I don't know what to look for in a PSU.
http://ncix.ca/products/?sku=58382&vpn=CMPSU-750TXV2&manufacture=Corsair&promoid=1315
http://ncix.ca/products/?sku=58382&vpn=CMPSU-750TXV2&manufacture=Corsair&promoid=1315