Random reboots, error reporting calls it BSOD, next gen hardware

I had the same problem with V 5.01. It would run 1 pass and quit. That was why I said not to press any keys when it starts. If you don't press them it will run fine. I timed one test and it really wasn't significantly faster anyway. It will only use multiple cores on a couple of the tests. But, Do you have a spare hard drive or a hard drive you can transfer everything to somewhere else, at least temporarily? I would like to do a clean install. To see if there is something else causing these problems. As I said previously, we have tested every component on the board. About the only thing left is a bad board hardware wise. I do not believe you bought 2 bad cards in a row. While it is possible, it is not likely. You decide, the only options left, are just calling it a bad board, testing each of your cards one at a time in both slots and a clean install. Those are the only options I can see left. It may boil down to testing the cards one at a time and a clean install. Testing the cards may be a good idea. I do believe you have performance problems. When you ran Heaven, I believe you said you were getting around 50 frames per second. I believe your 2 760's should perform about the same as my 780 Classified. Heaven is a GPU bound test, meaning it only tests the GPU, CPU does not matter. At stock settings I will get 78-80 FPS. I would have expected you to get the same, which leads me to believe either a bad card or a malfunctioning PCIe slot. With the same problems with the 670, I lean more toward the board. But, convincing Asus that's the problem will take more than that. If it were me, and it's not, I would pull one card and test it with every GPU bound test in each slot. Then switch the cards. See if you get different performance with the slots and with the cards. Next, do a clean install and only do a minimal install, just windows updates, motherboard drivers and a few programs that will make it functional, then run the GPU tests and maybe a game or so. But, trust me, you are not going to convince anyone you have a board or card problem playing Watch Dogs. That game has caused almost everyone considerable problems. You decide which you want to do, and I will help you. But, again, with 2 different cards having issues, I believe there is something more in play here.

In my experience, the CPU is the last piece of hardware to suspect. But, you could try it, if you want. A bad CPU is very, very rare. Personally, I really suspect the board. But, if you want to try to replace the CPU, go for it. It certainly can't hurt, and may help if it comes down to having to replace the board.

Do you follow my logic in the above post, and do you disagree? The reason I suggested a clean install on another hard drive is it would take any possibility of a storage problem out of the equation, it wouldn't affect your current install, and it would allow you to see if it could possibly be a software program conflicting other programs.

As I see it, you are correct. If you can, you may see if they will swap both CPU and Board. From experience, I can tell you it is much more likely the board than the CPU, just based on averages. Just take any board and any CPU and read user reviews and see which were sent back most because it didn't work, weeding out those who don't know how to configure them. I can't tell you how many people sent back boards that would 'only' run their 1600 MHz ram at 1333.

Well, yes and no. But to me, 2 hard drives, 2 cards, a PSU test, and ram tests, pretty much leaves everything else out. dealing with Asus is quite difficult, so if you can RMA it online, I would do it. Where did you buy it online, if I may ask?

Within the first 30 days, RMA no questions asked, just state defective on their form from your account. Where I buy just about all my stuff. They will give you a prepaid label to return the old board and with mine anyway, the replacement will be shipped the same day. You will have 30 days to return the old one. It doesn't get any better than that.

Just a word of advice. If you buy anything from them that costs substantial money, make sure it says sold by and shipped from Amazon. Some of their vendors are a crap shoot, some are pretty good though. and the sold by... but shipped from Amazon does not mean much.