Yup, tried memory at 160mhz FSB on a xp 1800+ T-bred at 1.60V. Runs windows just fine...but as soon as I do memory benchmarks, the PC reboots and I have to reset the CMOS just to make the PC to boot up. Oh well. Right now the Crucial PC2100 memory is running just fine at 155mhz. I am happy 