"While Intel Sandy Bridge-MS does not pledge inherent multi-GPU support, it is a waste to ignore its performance potential - particularly for multi-GPU systems. What the Intel Sandy Bridge microarchitecture offers for multi-GPU configurations, is higher IPC that alleviates processor bottlenecks which have plagued multi-GPU systems for so long."
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