Another important update on the P4T-E....
There are two versions of the P4T-E, both of which share the same revision. The newest version uses ICS brand 9212-13 DRCGs, while the older uses CYP 632081 DRCGs. Only the boards with the ICS chips can achieve stable operation at 533FSB and above. There are two DRCG chips on each board, located near the RAM slots.
Before buying a board, attempt to confirm with the vendor that the two chips located near the RAM slots have "ICS" (and not CYP) listed on them; that will ensure that 533+MHz memory is supported.
Note even if you have the version with the superior ICS chips, you will still need to use the mainboard DIP switches in order to run RDRAM at 533+MHz. Through the bios options, it is not possible to access the 1/2 AGP and 1/4 PCI dividers that are necessary to attain stable operation at high memory speeds; the only way to access these dividers is through the use of the mainboard DIP switches. Download the P4T manual from Asus' web site for info on how to correctly set the DIP switches for various memory speeds between 533MHz (PC1066) and 600Mhz (PC1200).