GIGABYTE GA-970A-DS3P AMD 970 Socket AM3+ BLUE SCREEN/PCI-E slot problem

[PlanB]

Hello everyone. I've built a new computer not so long ago, and so far I made some mistakes. First I've tried to built my computer with these components:

GIGABYTE GA-970A-DS3P AMD 970 Socket AM3+ATX Mainboard w/ On/Off Charge, Ultra Durable 4 Classic, 7.1 Audio, GbLAN, 2 Gen2 PCIe X16, 3 PCIe X1 & 2 PCI
CPU: AMD FX-8350 4.00 GHz Eight-Core AM3+ CPU 8MB L2 Cache & Turbo Core Technology

32GB (8GBx4) DDR3/1600MHz Dual Channel Memory

NVIDIA GeForce GTX 760 4GB 16X PCIe 3.0 Video Card

I found out the hard way that the NVIDIA plus MB and CPU was not a good match, I had alot of problems (pixels, hangs, BSOD, line, flicker) it was hell. So decided to change my card with this : Sapphire R9 270x boost & OC 2g DDR3... now I have several problem.

1- I get random BSOD
2-I try to fit my card in my second PCI-E slot and the card don't fit. Now how am I suppose to Crossfire this in the future?

I have run memtest, nothing where detected. I downgrade my drivers, I upgrade them... I did all the usual stuff, nothing.

Can someone help me please?

[autotech]

Did you try a fresh install of windows. The drivers for the Sapphire R9 270x  are not mature enough in my thoughts at this time. They will get better usually if I use amd based CPU I used that type of video card and most times if I have problems I do a fresh install of windows 7.

You didn't mention what operating system you are using. You can try using driver sweeper and clean all old NVidia drivers and amd graphics  drivers off and reinstall otherwise it is fresh install time. Just a heads up if you are using windows 8 or 8.1 might take awhile longer for the drivers to be great with that OS.

[PlanB]

I am using windows 8 (what was I thinking!?)