hey I have some planning about upgrading my computer as you can see on my sys-specs button the mobo is a ga-ma785gt-ud3h it do got 2 pci-ex16, but the second one only run at x4 speed. so i need to buy a new mobo to take advantage of the crossfire setup. and this is the mobo im thinking about. Gigabyte ga-790fxta-ud5 this is the 5770 i have http://www.hisdigital.com/un/product2-503.shtml they don't sell the same one i have anymore for some reason, so this is the only one available where i'm gonna buy the mobo and the 5770 http://www.hisdigital.com/un/product2-536.shtml as you can see there is a difference between them. will it work?