Can anyone give a primer on this AGP aperture stuff? I know you set it in BIOS, but is there a standard? Is the default usually the same as the card's memory? Can the aperture size be larger than the card's memory? Is there an obvious downside to increasing/decreasing it?
I used to have a problem setting my AGP Aperture size to anything more than half of the amount of my system memory -- my computer would lock up within a few minutes of playing any 3D game. That was a while back, though, and now that I have a gigabyte of RAM, I just set my AGP Aperture to the maximum my BIOS allows and left it there.
Yes, your AGP Aperture can be larger than the amount of RAM on your graphics card -- the setting indicates how much *system* memory can potentially be shared to supplement the video memory. I think a good rule of thumb is to set your AGP Aperture size to half the amount of your current system memory since you want to be sure to keep *some* RAM available at all times for non-video-card purposes, but you can experiment with higher settings if you like.