Now build 14D136 Probably OK if you stuck with the "Beta" version from Nvidia. But anyone who has: GTX750/Ti GTX780Ti GTX Titan Black GTX960 GTX970 GTX980 GTX Titan-X Should hold off on this update. I believe the last "real" drive looks for 14D131 so I can verify that it "breaks" it. Those comfortable modding things can change the usual things. Will be putting an update procedure on our Blog when I get back from a swim. A couple dozen Betas and still it needs a fix a few days after release....guess designing watch bands really requires some engineering skill. Hold off on the update if you have one of those cards, with or without EFI.