cant finish installing windows 7

i check the device manager there is no yellow triangle....
i dont overclock....
i will try to update bios......
but my 8 gigs works on windows xp x64... only in vista and 7 x64 will not work.... i always got this blue screen saying.....

atikmdag...... i dunno what it means

cbogz said:

i check the device manager there is no yellow triangle....
i dont overclock....
i will try to update bios......
but my 8 gigs works on windows xp x64... only in vista and 7 x64 will not work.... i always got this blue screen saying.....

atikmdag...... i dunno what it means

It means that you have a problem with your ATI graphics drivers. I'm not sure whether it's really that, or a memory problem.

Have you run a memory diagnostic yet? I'd suggest:

www.memtest.org

(Download the .iso form, create a CD, and boot from it. The test is OS independent.)

I've read that XP was able to boot on systems with memory errors, while Vista would fail. (That's not a virtue of XP: no one would want to run a system with memory errors.) I expect that Win7 would be the same as Vista.

If you get memory errors, you may be able to manually set the RAM paramters (voltage, timings, frequency) in the BIOS settings to get reliable performance.

i already check device manger and isee no yellow triangles.... i already tested the memory as you said and there is no error.... i dont overclock coz i dunno how...... and im afraid to upgrade my bios coz im afraid it might be corrupt.... when i use windows xp x64 8gigs works fine but when i try vista and 7 x64 the blue screens began to appear and says......
atikmdag.sys.......................i dunno wat it means

Do you have onboard graphics chip so you can unplug the graphics card to attempt install?

Are you booting from the installer? Use custom>advanced tools to wipe the drive and format first. Save a backup image of your Vista, or be sure you have recovery disks.

i already tried that but it has the same result.... but when i install 32 bit of windows vista and 7 it just works fine.... id unno what to do now lls help

thanks for all who gave me suggestions..... my problem is already done by updating the bios...im using now windows 7 x64.... again thanks to all who have help me.