Quake 2
Crusher

Demo1

Notes
If this was a race it would be a sad one, the DDR wins hands down in every instance. On the average, it outpaces the other cards by around 10 frames per second in every test on the Crusher demo. In this demo we also see that the FPS doesn't budge at all -this is attributed to Crusher's CPU intensive nature.
Demo1 shows the GeForce flexing a bit more and taking off with an astounding lead over the other cards. The weaker CPU really shines at high resolutions taking the DDR to almost Coppermine performance levels (of course, it's just the fill rate limit of the card, but we don't want to hurt the Celeron's feelings).
Quake2 doesn't quite give the desired results one would expect over increasing resolution with the Celeron. While the Coppermine/DDR showed the classic drop in speed, the Celeron/DDR did no such thing. The video card was hardly the limiting factor in this test, it seems the CPU is still quite a deciding factor as to how the video card performs, which is easily seen by the large discrepancy between the Coppermine and Celeron performance numbers in the low resolutions.