Hi all. I have bought a second-hand SuperMicro P6DBE (Ver.3.0)\nmotherboard with two P-II-350 CPUs. It works fine... with one small\nexception: it refuses to detect my memory. I have two 256MB PC133\nmodules (by NCP). They were tested on other machine. Each of them\ndetects as only 128MB on this motherboard. 32MB PC100 Hyundai module\ndetects and works fine. I tried turning BIOS option "Memory autosizing\nsupport" (or whatever it is called) on and off, updating BIOS and\ntweaking other options with no luck. Things get really strange when I\ninstall all these modules at once (256x2+32) -\- all installed memory\n(544MB total) detects without questions. Motherboard refuses to boot,\nthough -\- both Windows 2000 SP2 and Red Hat Linux 7.3 (2.6.0-test5\nkernel) crash at the beginning of bootup. I'm not surprised by this -\-\nI think I have read in manual that only 512MB of plain SDRAM can be\nused, but why they are detected, then? I hope someone can help me\nhere.