HI - I've got a Latitude C610 (BIOS A16) that has been working just fine for about a year (Aug 2004 to now) with two 256MB memory sticks (they are both PC133 CL3, but from different manufacturers (Micron and Infineon, for the record)).  However, recently, @ POST (BIOS POST type is set to THOROUGH) I get a message something like: Memory error at 1FFE0004.  Expecting DA1, found DA0.  Reducing amount of available memory. 

 

However, when I reduce the number of memor sticks from 2 to 1, the POST message goes away. 

 

I've swapped in memory from a C810 that I have (also 256MB PC133 CL3 (ALL of the sticks work fine in the C810)- manfacturers are SAMSUNG and TOSHIBA, for the record) - again, if I use (any) two memory sticks, the error shows up (slightly different memory address in some cases), but if I use only one memory stick, the POST works just fine.  The single memory stick can be either in DIMM slot 1 or 2, with same results (no errors with one stick).

 

Anyone seen this problem?  Is this a MOBO problem?  Or should I try to use two memory sticks that are EXACTLY the same (again, the C810 doesn't seem to mind - I can use any two memory sticks in it and POST works fine and I'm able to use the full 512MB - it's just the C610 (and only recently) that is having hiccups.)