Well I've just been banging my head against the wall over the weekend trying to get my brand new MSI R9 290X Lightning graphics card to work without constantly bluescreening in Windows 8. I did everything imaginable including formatting (from Win 7 to 8), resetting motherboard CMOS, trying different PCI-E slots, using 2 separate PCI-E power cables, increasing system agent voltage, you name it. I've tried Catalyst 13.12, 14.1, 14.2 and 14.3 and they all give me the same 0xa0000001 bluescreen code often referencing the atikmdag.sys module. Only just now did I realise what the cause is. I used to have a HD3850 that did the exact same thing years ago and I remembered the Powerplay function which plays around with the card's clocks. Funnily enough the EXACT same issue even now is still occuring with my brand new MSI R9 290X Lightning card years down the track. Using GPU-Z I watched the memory clock jump from 150Mhz to 1250Mhz when doing something simple like scrolling or clicking and dragging a window. It quickly jumps back down to 150Mhz again. Do these actions rapidly enough will make the clocks jump up and down like haywire and BSOD the computer. I'm sure something like this can be fixed via a driver or bios update, but how long is that going to take? Powerplay 2.0 my ass... Throwing up whether to keep the card in hope MSI responds with a fix as Asus has appeared to have done or hoping that the 14.4 drivers fix it. Otherwise this card can go right back and I think I will be jumping ship to Nvidia to get a 780 Ti 6GB card when they come out sometime in May or June.