actually, the file you download doesn't relate to your graphics card, but your platform and your will be IA32.
Just trying to let you under stand what IA32 truely means.Here goes
IA32 was for processor like Pentium and Athlon with 32 bit processing
Amd64 was for the new processor from www.amd.com
with 64 bit processing.
IA64 was for Pentium's latest processor with 64 bit processing.