I have installed Linux RedHat 6.1 on a pc with a AMD K6 266 Mhz procesor with 64 Mb Ram one module DIMM Pc 100 at boot the system recognizes 16 Mb RAM if I wrote at the boot time linux mem=64M the system boot but it fails if I boot Windiws NT the system recognizes all 64 RAM Hoping to hear from you soon, yours B Tarnavschi