x58 motherboard 3 dim slots not functioning faulty ram or board?

dim slot   Dan dimm2 slot

DIMM slots in this compute module are identified by number and by letter Letters identify the population order Slot numbers indicate the DIMM slot ID for

DDR4 is not backward-compatible with DDR3 so a DDR4 DIMM will not fit on a DDR3 DIMM slot Not only is the key notch of each DDR generation Slot furthest away from your cpu, then skip one, then stick a dimm in and the one closest to your cpu is also empy? CPU - empty - dimm - empty -

heylink slot demo For this process to work, you need to ensure that the RAM Modules are slotted into the designated location—you can't just use any ol' RAM slot So, if you use DIMM or remain with the DIMM slot With BIOS x or later, the first recommended step is to restart