256 MB PC1066 RDRAM $103.50(samsung)
Point taken, however to have 256MB of RAM you would need 2 128MB sticks, that'd be about $144. Continue?

a AMD 2400+(1.92 GHz) w/266 FSB is $178.00
256 MB PC2100 DDR $68.87(Micron Crucial)
256MB PC2700 DDR is $72. That's exactly what 128MB of PC1066 RDRAM costs. So you get twice the RAM for the same money.

And?

And the memry bandwidth is double that of the AMD.
103.5/68.87 ~ 1.5
Wrong. As usual.

PC2700 RAM would achieve a THEORETICAL 2.7GB/sec of memory bandwidth. Since RDRAM uses a 16-bit data bus, single-channel PC1066 RDRAM (which is purely theoretical and does not exist) measures in at 2.1GB/sec. If you add dual-channel support you have a theoretical 4.2GB/sec, however, factor in a lot of latency from the dual-channel architecture, and you'll find that it isn't as much faster as it looks on paper. Faster, yes, but not 1.5x faster.

In addition to that, AMD also has a dual-channel architecture.

The p4 will beat the amd
Maybe, maybe not. The P4 is a pretty good OCer, but on the other hand, so is the AMD. 2.4Ghz is easily achievable with the XP2400, and if you reduce the multiplier and raise the FSB, you can get 200Mhz FSB (400Mhz effective) with a little luck, and blow away any Pentium 4 at 2.4Ghz/400Mhz DDR.

P4s have a quad-pumped FSB but it only really matters with RDRAM. If you're on DDR, there's nothing that will use the 533Mhz FSB.

So you pay $325 for the P4 combo, and $250 for the AMD combo, and maybe you get 5% in either direction with the systems.