Hi, I posted this on the hardware section, but got no reply..and the problem's still buggin' me

I just got a PII266 with 128 memory and 56.6K SupraMAx PCI. The problem is that my Internet connection is really slow, slower than my ld P166 with 80 memory and 28.8 Acer modem with the same ISP and same phone line. How can this be?
I checked with NetMedic and it says that the problem is with my PII266 CPU load. But why is it even slower than my old comp.?

Please help..