BSOD driver_irql_not_less_or_equal

packard bell x2416
4gb ram (2x2gb)
geforce 210
windows 7 64x ultimate

recently installed a cheap geforce 210 to replace integrated graphics.
got bsod on first boot, so i removed 2 ram stick, and it worked.
updated drivers for graphics card and it works fine.
however, when i put the 2gb ram back in, bsod.
so at the moment i am just running 2gb ram and the graphics card.
i have removed all the integrated graphics drivers, even though i assume they will disable when new graphics card went it.
my bios is set to pci-e load up.
i have used WinDbg to analyse .dmp file, however i dont really know what to look for.
any help would be really appreciated! this is really annoying me.

When i do use the WinDbg i get

Your debugger is not using the correct symbols ***
*** ***
*** In order for this command to work properly, your symbol path ***
*** must point to .pdb files that have full type information.

Probably caused by Ntfs.sys ( Ntfs+ab000 )

Now the problem has changed, by installing sp1, the bsod has changed to system service exception?

Post it following the Blue Screen of Death (BSOD) Posting Instructions.