Last night our second family PC Blue Screened with an 0x4E PFN_LIST_CORRUPT error which is a very strong indicator of corrupted memory. Memory is Crucial Ballistix PC3200 (DDR 400) in a 4x512 (2 gigs) configuration in a socket 939 system Epox 9NPA+Ultra motherboard. The specs on this memory are as follows: 2.8 voltage which the motherboard has it set at correctly as well as in 2T. The CAS is a designed 2-2-2-6 but mobo has it set at 3-4-4-8 which is probably due to the 4x512 configuration and 2T Ran memtest and into the fifth PASS received 212 errors all in Test 5. I saw enough so I tested each stick individually for the minimum Passes of 7 and no errors on any of them even in test 5. So I reinstalled all four sticks, checked the BIOS settings and ran Memtest again and in the very first PASS I received 20 errors in Test 5. Any ideas?