hjs schrijft dat Eric van Fast Graphics de Real World T&L performance van een GeForce kaart getest heeft, zowel met als zonder DDR Ram. Hierbij heeft hij gebruik gemaakt van 3D Winbench 2000 die hij vervolgens op een Athlon 700 systeem gedraaid heeft. Ter vergelijking zijn ook de scores van een TNT2 Ultra opgenomen. Hieronder wat over de resultaten, voor de rest moet je hier zijn.
The first benchmark, the "speedway" is a real T&L test. When you look at the results you see that the performance with T&L enabled is about 2-3 times better than without T&L. This clearly shows a CPU bottleneck when T&L is disabled: Even in the higher resolutions the non T&L scores remain virtually the same which means that the CPU cannot provide the T&L data fast enough (note that this a a 700 MHz Atlhon !!!)
The Rust Valley and Chamber scenes on the other hand are quite simple, thus depending little on the T&L engine and more on the card's fill-rate. The Rust Valley scene even runs better without T&L than with T&L enabled.. I'm not sure what causes this, but I guess that when T&L is done on chip, the fill-rate suffers somewhat because there's only so much data that can be processed per second. When T&L is done on-chip this means that an extra burden is put in the AGP bus, the GeForce chip itself and the memory interface on the GeForce. Again, this is only a guess, but I'll let you know as soon as I have more info on this issue.
When we look at the overall results, we see pretty much the same pictures for 640x480, 800x600 and 1024. All cards score lower when the resolution goes up, but the scale remains about the same.
Only 1600x1200 shows different results because this is where we hit the fill-rate limit. TNT2 Ultra has to give the GeForce DDR some more space here since it just can't provide the fill-rate anymore. Due to the that same fill-rate limitation we see that the T&L engine on the GeForce can't do miracles anymore as even GeForce is hitting it's fill-rate maximum and T&L is no longer the only bottleneck.