Antialiasing performance
We have a mixed bags of results in normal game tests, but what happens when we pit the cards against each other in an antialiasing test? Without getting too deep into antialiasing theory, it's important to know that both cards are doing multisampling, which means extra memory is needed to store the different samples.

The antialiasing results are mixed; let's break them down for a closer look.

At 1024x768, the 128MB cards don't have any kind of real advantage, even with 4X antialiasing.

Bumping the resolution up to 1280x1024, we start to see the GeForce4 Ti 4200 64MB having a little trouble keeping pace with its 128MB counterpart, but the performance delta is still quite small.

At 1600x1200, something interesting happens: the GeForce4 Ti 4200 128MB is the only card that can render the scene with 4X antialiasing. The memory requirements for four samples at such a high resolution are steep, and the 64MB cards don't have a chance.

So why can't the Radeon 8500LE 128MB handle 4X antialiasing at 1600x1200 when the GeForce4 Ti 4200 128MB can? I have a few suspects, such as the efficiency of each card's Z-compression, texture compression, or even how the drivers themselves are using the memory.