Hi Derek. The aperture size in BIOS is the amount of system memory you are allocating to the graphics card. If your new graphics card has adequate memory, you don't need to allocate much sytem memory. I have read that some software works better with more system memory, and some with less. If all is working well with 32M, then leave it at that, but if you have plenty of system memory, you could experiment with 64M or 128M to see if it makes things work any better.