I also didn't noticed any improvements with 8.1. I've benchmarked my sytem with DirectX 8 and 8.1 and the scores of 3DMark2001 are the same (both around 4650). I've a 1,4 GHz AMD Athlon, 512 MB DDR PC2100 RAM and a Geforce 2 MX card OC'ed (GPU from 175 to 220 and Mem from 166 to 205). I use Win98.
I wished I had a GeForce 3 .
Go check for your self.Pixel shader 1.4 is support only be Radeon 8500.Pixel shader 1.4 is 1 of the feature of DirectX 8.1.Not sure but n-pacth is also 1 of the DirectX 8.1.Ati readon 8500 is only one to support it (truform.
Wisdom dont come with time
Meilleur chance la prochaine fois