If we limit our options to single cards, whether they be single GPU or dual-GPU, the battle is even more interesting. Because AMD`s new Radeon HD 7990 depends on CrossFire technology to perform, the 13.5 beta driver that still has the runt frame and frame time variance problems places it in a very bad light compared to NVIDIA options like the GeForce GTX Titan and the GeForce GTX 690."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips