Just to make sure that you know... I have two computers. The one with the heating problem was the GIGABYTE one, and now the one with the Combat Arms problem is the MSI one.
I have 16GB of RAM installed in the MSI one along with a 1GB ATI Radeon HD 5750 which is DDR5.
The drivers for that Graphics Card are from the CD that it came with.
get the ones off AMD not off the cd!
they will be very old drivers indeed on the supplied cd (6 months minimum age)!
download catylist 12.3 as that is more stable then 12.4 it will be in the older drivers section!