MSI E350DM-E33 Series Manual page 16

iMportANt
DDr3 memory modules are not interchangeable with DDr2 and the DDr3 stan-
*
dard is not backwards compatible. you should always install DDr3 memory
modules in the DDr3 DiMM slots.
* to enable successful system boot-up, always insert the memory modules into
the DiMM first.
6
Notch
Volt