whoa whoa whoa... back up the train... RD Ram is NOT faster than DDR... DDR = Double Data Rate... meaning it uses both sides of the clock cycle to process commands.. DDR is PC1600/PC2100, etc... the numbers (200, 266) refer to FSB..

Don't waste your money on RD... it's not worth it. Go with DDR... I'm using DDR in my machine and haven't had any problems.

I can't help you with the processor stuff tho... I only have a 1.2 GHz Athlon Thunderbird...