Well I've been having a nightmare with my 290X's since I got them. No matter what drivers I used or Mantle on/off BF4 (and all other games) have been running like a pig. I'd tried clean installs of Windows 7 and even 8.1. Compared to the Titan's these cards were appauling. Games would play, the frame rates were fine, but there was just so much stutter and lag. I was seriously regretting buying them; so much so that Saturday morning I took them out of the case to take them back to Scan and get my money back before the 7 days ran out. Before I packed them back up I decided to test the system with just one card in. I put in the first card, fired it up and it all worked fine. BF4 even ran well. I swapped out the first card for the 2nd one and booted up. Straight away I could tell that all wasn't well. I had strange flashing images on screen and when I booted up BF4 there was horrendous artifacting on screens. I changed from 5900x1080 (bezel corrected) down to 1920x1080 and the issues still persisted. I'm glad I've got the the bottom of the problems, but I'm very disappointed that one of the cards is broken. For once I had nothing to do with it either as I'd never even got round to any overclocking or watercooling. What's also annoying is that I now have to go through the RMA process. This is the first time I have gone down the route of the red side for many a year. Not a great welcome.