Got a 2013 pcb rev 2.0 with BIOS ji438 worked for years with a single\nPC100 cl2 128Mb dimm. Tried to upgrade to 512Mb recently with 2\nidentical Kingston low density (double sided) 256Mb PC133 cl3 modules\nwhich the board is supposed to support. Only sees the dimm in the\nfirst slot (farthest from cpu). Either dimm by itself works in the\nfirst slot by itself. Single dimm in either 2nd or 3rd slot is not\nrecognized and gets memory POST beeps at boot. Even tried the\noriginal 128Mb PC100 dimm, same thing. Ok in slot one, not recognized\nin slot 2 or 3.\nSounds like 2 bad memory slots, huh? Replaced with an identical MB\nfrom another system, and get the same results. WTF????\nReset BIOS settings to default, tinkered with BIOS memory settings, no\nluck.\nAny ideas?