Some days ago I put new graphics card into my Win 8.1 Pro 64bit PC (before using iGPU only). The Windows performance Index raised from 5.9 to 8.0 (graphics: 8.4), but now I suffer from blue screens coming up time to time (sometimes after few minutes, sometimes after half a day or longer). I found some 0x00000109 errors, but I do not know how to get rid of them. My power supply is a Corsair CS550M and I run a Intel i5-4670K (not overclocked) with 2x 8GB G.Skill 2666-12 TridentX Memory, a Samsung SSD 840 Pro (256GB) and 4 HDD's (2x 2TB and 2x 3TB), so the power supply should be strong enough.
I can not figure out, whats the reason for the bluescreens. Yesterday it came while running a virus check (Avira), sometimes coming during overnight download job or just when opening new (explorer) window or browser tab.
Driver & Software of graphics card are the newest supplied at Sapphires, no overclocking. The GPU's temperature is at 47 C or below.
MB's Bios is 18.02.
I don't even know if it is an MB's or graphics card issue.
thank you for your answer, I found the solution for my problem. Deciding, that the new hardware should be OK, I opened the computer case and checked all cable connections Friday evening. It seemed to me, that one power cable was not connected proper, and I fixed it and pressed all connections firmly into their places. I started the computer again and had no more blue screens till now (running the computer almost all the time with several tests like FurMark and similar) . I also checked the energy options and found out, that the settings made the pc to enter sleep mode after two hours without action. I changed it to "never" and the overnight download session run thru perfectly.
So I am ashamed to confess, that all the trouble came from me, but also happy to find solutions for them!