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GPU/Drivers problem on W7 (MSI Radeon R9 270x OC x2 CF)

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Topic Starter
-Makishima S-
Long story how this problem look and how it show up:

I am owner of 2 x MSI R9 270x OC, both in crossfire. Unfortunely for me, i need to use Windows 8.1 and distributor drivers (from MSI). Here comes my pretty big problem: I cannot use this in Windows 7 with standard AMD CCC drivers. I done some test:

1
- Single card in mobo
- Windows 7 Home Premium x64
- newest AMD drivers (15.7)

Result: "Display driver stopped responding and has recovered" every few minutes, even without doing anything. Clear OS, only drivers installed. System randomly freezes.

Same problem with second card, crossfire doesn't work.

2
- Single card
- Windows 7 HP x64
- distro msi drivers (14.4)

Result: "Display driver stopped responding and has recovered" - with exeption that i need to run something what use GPU, system is stable.

Same problem with second card, crossfire doesn't work.

3
- Single card
- Windows 8.1 ProN x64
- newest AMD drivers (15.7)

Result: "Display driver stopped responding and has recovered" without no reason every few min, system randomly BSOD with "System_Thread_Exeption_Not_Handled (atikmdag.sys)"

Same issue on second card, crossfire doesn't work.

4 Most interesting
- Windows 8.1 ProN x64
- distro MSI drivers (14.4 - 2014.09.22)

Both cards separately - stable without problems, even under full usage (OC turned ON)
Crossfire works perfectly.

Anyone have idea if there is any reason for driver problems above? I am realy tired of W8.1 and honestly, i do a lot exept changing hardware to go back into W7 for non-aero fast OS.
Is there a reason that W7 might not work stable with this setup even on MSI distro drivers?
OS is legal, installation ISO taken from MS site.

Cheers.
kouzuki_karen
wow look at this guy and his ultra 1337 setup
deletemyaccount
It could possibly be an issue with crossfire.

also why are you crossfiring two 270x dude just buy a single more powerful gpu for less driver stress
IppE
:amd:
Topic Starter
-Makishima S-
wow look at this guy and his ultra 1337 setup
Such inteligence, your level of sarcasm made me laugh for long time, thanks bro.

It could possibly be an issue with crossfire.

also why are you crossfiring two 270x dude just buy a single more powerful gpu for less driver stress
Old setup, it already have his age. xfire works perfectly on w8.1/msi drivers but even with single card, drivers crash on w7. It's weird to me, i consider that drivers are fked up but dunno, googled a lot about that and most issues are related to drivers. Still don't know why W7/msi drivers crash and W8.1/msi drivers work stable.

:amd:
nvidia overrated, noty.
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