I am having a lot of problems that seem to stem from my AMD GPU.
I am running the retail version of Doom 3 with the 1.3.1 patch. The screen resolution won't save.
I also can't run any mods.
After reading complaints of the same problem they all seem to point to having an AMD GPU and CatalystAI.
CM Storm Scout, AMD Phenom II X4 965 Deneb Black Edition @ 3.4Ghz w/Cooler Master Hyper212, MSI 870-G45, Corsair XMS3 4gb (2x2gb) 240-Pin DDR3 SDRAM DDR3 1600 @ 1600 Mhz, Sapphire Radeon 6870, WD Caviar 500gb, Sony Combo CD/DVD, Corsair Modular HX620