New I3/5/7 system not booting? Check here.

[Meaker]

Socket 1156:

If you install the ram into slots 1 and 3 of the board and leave 2 and 4 empty your board will not post.

Ram must be inserted into slots 2 and 4 FIRST.

Socket 1366:

If you install the ram into slots 1, 3 and 5 of the board and leave 2, 4 and 6 empty your board will not post.

Ram must be inserted into slots 2, 4 and 6 FIRST.

 

[Meaker]

Just out of curiosity, why is this?

The way the memory controller channels on the CPU are set up.