In our launch review of the GeForce GTX 670 2GB graphics card this week, we had initially mentioned that these $399 graphics cards would support SLI, 3-Way SLI and even 4-Way SLI configurations thanks to the pair of SLI connections on the PCB. We received an update from NVIDIA later on that day that in fact it would NOT support 4-Way SLI."
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