32bit RDRAM still requires a crimm. The biggest difference between 32bit vs 16bit is that only 1 rimm is requirred vs. 2, and the termination resistors are actually on the crimm with the 32bit boards, and are on the motherboard with the 16bit boards. However, both platforms effectively are able to process at 4.2gb per second. As stated in the review, its basically a marketing ploy to try to get more people to use RDRAM based systems. I have read a lot of people saying lately that RDRAM is cheaper than DDR. While this is true to a point, it is really a moot point when you consider that you have to buy 2 rimms compared to a single piece of DDR. Ala, enter 32bit RDRAM...