Originally posted by: purpleparalyzer
I assume the 3 series is older and less powerful but i could be wrong just checking.
Well, it's certainly older, and less powerful in the sense that the 6 series will support shader model 3.0 (DirectX 9c instead of just DirectX 8), but as to performance, it's questionable.
http://en.wikipedia.org/wiki/Comparison_of_NVIDIA_Graphics_Processing_Units
A good performance indicator is the number of pipes, and there, the GeForce 3 is still ahead of the 6100.
In case it's of any use, a 6200 performs comparably to a 4400 Ti (faster in some measures; slower in others -- hard to say precisely, depends on the test in part). A 6100 is quite a bit slower than a 6200. A GeForce 3 is slower than a 4400 Ti, but possibly not by a large extent. So there's a good chance, IMO, with an older application at least, that a Geforce 3 will out-perform a 6100. Could be a snail vs. turtle race.
Please take the above with a lot of salt. I haven't spent much time benchmarking low-end graphics or reviewing others'. A lot depends on the particular application, and even system, and in a 6100 vs. GeForce3 case, the systems would normally be very different. What matters in the end is the performance on the target system on the target application and configuration -- nobody knows better than you what that would be.