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This review is from: ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Pros: Board looks nice. Came packaged better than my other boards I have purchased.
Cons: Hard locks and inability to run SLI properly
Other Thoughts: I believe the board has an issue with the second PCIe slot. I put the board into a new case and added my 660 Ti SLI combo. It worked fine most of the day. After a while it hard locked with a checkerboard screen. I tested GPU's in single config in both slots. That worked but once you enable SLI it can't properly detect the second card. I tested both cards in my primary PC running Battlefield 4 at max settings with 0 issues for hours. The cards are fine. I believe it is the board. Tested each GPU in each slot with 0 issues. Tried each power adapter from my Corsair 750M PSU. Even running both cards with SLI off runs fine. I turn on SLI and I get one card showing up as error 43 in device manager and the other shows fine. Sometimes on reboot it will come up properly other times just black screen. Cleared CMos and Reinstalled Windows with same results. Tried newest drivers from Nvidia and also drivers from Oct 2013 same issue. I installed my 780 in the Asrock and like the 660 Ti's. it worked fine. Once SLI is enabled the board falls apart.READ FULL REVIEW