issues on Ga ex 58 ud5 version 1.6 and xfx gtx 275

i am new to this hackintosh scene and i just built a recent core i7 system with Core i7 920 do stepping and Ga ex58 ud5 and 6gbs of g skill ripjaws ram, 2x1tb samgung f3 hard drives and seagate freeagent 500gb( snow leopard hard drive) and a xfx gtx 275 and ati 5770 also by xfx but my issue is when i try to install mac On my pc (used Chamelion rc3 and 4, and empire efi and empire efi legacy ) and no luck what so ever when i use the offical snow leopard dvd it loads the kexts and after like 30 seconds my monitor goes off but the fans spin and the dvd drive is spinning but no picture whatso ever! ive updated the bios from f7 to f9 and to f12 either the monitor going off or my pc just randomly restarts! has anyone had this issue can and i am getting really pissed and i dont want another pc…