T-break has finished a review of the new Iwill board for the P4 supporting 533MHz FSB and 1066MHz RDRAM. Here"s a bit from the review:
Iwill was kind enough to provide us two sticks of PC-1066 RDRAM as they"re not available in the market and we had no problems with that, or our older PC-800 RDRAM sticks. Keep in mind that RDRAM does not like being mixed and matched. If you"re planning on using four sticks, make sure they"re identical in terms of speed and size.