I recently upgraded from an asus p4t-e i850 board to a Gigabyte ga-8ihxp 850e board. I've been running a 1.6a @2.4 on both boards using pc800-40 rdram & using the 3x multiplier for a pc900 speed on the rdram. I recently picked up 2 128mb sticks of Samsung pc1066 RDRAM thinking I could leave my FSB at 150, but using the 1066 RDRAM at the 4X multiplier resulting in PC1200 speed memory. However, even using the over-volatge option on the board for RDRAM, the best I can get it to run is at a 142 FSB. Do you think it is the memory that's holding me back from hitting PC1200 or is it the clock generators on the board? I was thinking that 2 different sticks might be worth trying. Because at this point with my current setup, the PC800-40 RDRAM is a better option because it allows me to run my P4 1.6a @2400 because of the 3X multiplier. Running the PC1066 memory will not allow my computer to boot when the bios is set to the 3X multiplier. Any advice would be appreciated. Thanks.