Struggling with R9 270 Drivers: trouble installing properly and blue screen - Windows 7

[RapidRage]

Yesterday I switched from my Radeon 5800 series (don't remember which one) graphics card to a R9 270 OC edition graphics card. Windows installed its own driver for it, then I used the CD to install Catalyst Control Center and its drivers. I ended up getting blue screens quite often. So I removed all AMD drivers and installed again and it was working fine (getting over 250 fps in Team Fortress 2 on highest settings).

This morning I tried playing another game (Dirty Bomb) and I was getting quite low FPS (around 30) and then I got a blue screen of death. So I decided to reinstall the drivers.

I've tried these two guides:
http://www.hardwareheaven.com/community/threads/solution-catalyst-install-manager-has-stopped-working.168606/
http://www.techpowerup.com/forums/threads/how-to-reinstall-video-drivers-quick-guide.52502/

I have:

• 
  -stopped Windows from installing its driver and only installed AMD drivers (but Catalyst Control Center would keep crashing during the installation)
  -removed all AMD driver files, let Windows install its driver, then install Catalyst Control Center (this results in blue screens)

I've tried both the graphics card's CD and the newer drivers from AMD's website using their automatic driver tool. Neither of them work.

Right now everything is installed but I keep getting a blue screen of death that refers to atikmpag.sys. I'm also getting much worse performance (TF2 is getting around 80-120 FPS and there are graphical glitches).

Please help. I'm not sure what to do.

 

[terry4536]

I would take a look at this article. I would use DDU to remove any remnants of the previous graphics card installation. I would give that a try first. I would download the latest driver and not use the installation disk. (I would download and unzip the driver to a flash drive. It makes the process easier.)

Next I would clear the CMOS, and then try the installation again. The next step is either a clean reinstall of the operating system or updating the BIOS.

http://www.tomshardware.com/faq/id-2032150/installing-graphics-card.html