GeForce 7800GS+
In March 2002 I bought a GeForce 4 Ti 4600 (an upgrade from a GeForce 2 GTS if memory serves). I wrote on my site that I had a jump from 3546 points, to 7197 points in 3DMark 2001.
That card blew-up, under a year later. I replaced it with the cheaper GeForce 5900. I never ran that benchmark, but I've just bought myself a GeForce 7800GS+. So I thought I'd run the same test again.
We are now on 3D Mark 2006, but as I don't have scores for that, I thought I would use 2001, just to show the difference first.
GeForce 2 GTS: 3546
GeForce 4 Ti4600: 7197
GeForce 5900: 13645
GeForce 7800GS+: 20521
Now to bring things up-to-date. I've run 3DMark 2006.
GeForce 5900: 419
GeForce 7800GS+: 4368
And a bit of trivia about the 7800GS+. This is a card created by Gainward, which is probably the last AGP card we'll see, now that everything is PCI-E. The GPU is actually a 7900GT, but Nvidia did not allow Gainward to badge it as one.