Systems based on Core i7 desktop processors support non-ECC UDIMM only. Systems based on Xeon E5-1600 v3 / E5-2600 v3 Series processors support either ECC UDIMM or RDIMM, with no non-ECC UDIMM support.
Faster memory will clock down to run at optimal speed depending on processor model.
MODULES MUST BE ORDERED AND INSTALLED IN FOURS for Quad Channel mode.