Crysis freezes at load screen!?

Hello all, I recently bought the Crysis series on steam, and Crysis 2 works, but the original freezes on the first splash screen. Like, it can't even show any logos or anything, it just black screens. I DO have a bulldozer (It's actually Zambezi, but its the same) and I know that it has problems. While just writing this, I loaded up Crysis Warhead. It doesn't work, either.

Specs:

AMD FX-6100 (Like I said, its Zambezi)
MSi 970a-G46 Mobo
LEPA 500W PSU
AMD/ATi Radeon 6670
8 Gigs PNY Desktop RAM
2x500 Gb Seagate HDD's