Hello. I have a problem with my Asus Radeon R9 290x video card, that i’ve purchased recently. My system set up is: CPU: 4-i5-4690K MB: Asus Z97-A RAM: DDR 3 G.Skill Sniper 2400Mhz (CL 11-13-13-31) 8GBx2 (F3-2400-C11D-16GSR) PSU: Super Flower 650W 80+ certified (SF650F14MG) SSD: Samsung Evo 850 HDD: Some old WD 2TB SATA 5,400 (tried disabling that as well). Keyboard and mouse are USB (Razer Tarantula and Razer Lachesis) - tried unpluging keyboard I also use 1-5 coolers (disable all except CPU for testing purposes). Once i’ve got the system, i was able to use it for one day (both web and playing Shadows of Mordor till 2am) without any problems. However about one day after active use i’ve started to get strange crashes, bluescreens (0xA0000001), driver crashes (the driver has been restored) and freezes. This doesn’t happen only with my system is 3d processing something, but it often happens, when i’m browsing web (i’ve tried to disable Hardware acceleration in Chrome). I’ve also tried to test the card with latest 3d mark, and cann’t get the “Fire Strike” demo in the loop for more, then 10 minutes (usually it freezes). What have i tried already? I’ve tried a number of drivers (13.2, 14.5, 15.4 15.5) all possible drivers (both removing old ones with DDU and with a clean install of Win 8.1 with disabled network). I’ve also tried Win 10 once, just to see, if the problem remains (it did). I’ve also tried clean 8.1 install without any other drivers, except Catalyst. I’ve tried disabling all on-board devices in Bios (Sound/ Network/Integrated video) and did a fresh install of win 8.1. I’ve tested the RAM (memtest for 10 hours; each module separately) - no problems. I’ve tried other PCIE slot. I’ve tried reseting and updating the bios (And also restoring it back). Unlikely attempts: I've tried to disconnect the Keyboard and replace the mouse. I've tried to use other HDD (from the other computer) So basically now you might say, that it looks like it points at defective PSU or defective video card....But wait, there is more. The interesting part is that if i put this card into the old computer ( Core 2 Duo E8400, MB: Asus P5K SE; RAM: Some Samsung DDR 2 (i think 800 Mhz, but i’m not sure) 5 SATA HDDs + 5-6 coolers. PSU there is 550 W Be quiet!) it works without any problems (Fire Strike demo was running for 2 hours without any problems, though CPU has limited the result). If i put the old video card (EVGA Geforce GTX 465) into the new computer is also works without problems (though of cource the card is significantly weaker, compared to Radeon) with GPU limitations). I’ve tried to plug the PSU from the old computer (be quiet! 550W) to the new one with the same results (it crashes, but that does not eliminate PSU entirely, as be Quiet is only 550w). I’ve tried attaching the new PSU the old computer with the same results (works without problems). I've also tried to power the video card with the old PSU, while powering the system with a new one - same result. Basically all parts in the new PC were just purchased, and i can return any of them (though Radeon got few scratches on the “Armor" due to the constant removal. So now it looks like a very specific incompatibility (or am i missing something). Though it looks pretty strange, as my build type is quite wild spread, while MB and Video are coming from the same manufacturer/brand. Thus my question is - 1) Am i missing something? Should i try something else? 2) Should i return MB/RAM/CPU/Video? If yes, what should be returned first? I was buying parts separetly and some of them from different vendors, and returning all parts doesn't sound logical to me Though indeed it's better to return now, then to be stuck with the faulty build for the next 5 years.