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

dim slot
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DDR3 Memory Adapter Card 200 to 240Pin Laptop to Deskstop Memory Transfer Card for SO DIMM Slot for DDR3 204 pin Notebook DDR3 240 pin Desktop DIMM Male

Carefully insert the DIMM at an angle into the holder on the formatter note: Position the DIMM so that the slot in the DIMM is aligned with the tab in the

dimm2 slot Recommended DIMM Population Order Number of When one DIMM is used, it must be populated in the blue DIMM slot (furthest away

dimm slot DIMM slot to pinpoint the DIMM that has gone bad On this specific box there are 16 slots :frowning: Just wondering how one might pinpoint