"Quad CrossFireX is appealing from a technical hardware enthusiast standpoint. However, it doesn't exactly produce the gameplay experience advantages needed to live up to the price tag required. The one game that really needs it, doesn't utilize it very efficiently yet, and the other games that do already have a great gaming experience on just one Radeon HD 3870 X2."
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