Most of the Intel(R) Desktop Boards are validated to work with 800 mhz memory modules rated for 5-5-5 or 6-6-6 timings with a voltage of 1.8v.
The memory you have installed may not be compatible with those specifications and the system is trying to clock the memory as good as possible, usually the cl4 memory is rated for higher voltages like 1.9v or 2.1v
You may need to try some regular memory rated for 800 mhz at 1.8v with cl5 or cl6 and see what happens
Thanks Diego_ Intel. I figured it was something like that. I'll have to give that a try (eventhough it pains me to leave 4Gb of memory unused :-)
Excuse me for reopening this thread...
I've got a pair of Corsair CM2X2048-6400C5DHX 2G modules, and the D510MO and it also (or still) refuses to boot...
The module also says it is a 800mhz 5-5-5-18 timings 1.80v and a version number (ver4.1)
anyone any thoughts since last year....