https://www.tomshardware.com/reviews/unstoppable,459-2.html
Full Speed Ahead: DDR400 Vs. RDRAM (PC1200), Continued - Unstoppable: DDR400 vs. Rambus | Tom's...
May 1, 2002 - We pit the fastest memory modules (DDR 400, DDR333, DDR266 and DDR200) against Rambus. Which one helps your PC system attain the highest performance level?
full speed ahead