RE: Precision T7400 Workstation: Memory Riser Boards

I would suggest referring to the Users Guide which is downloadable in PDF format. Starting on page 172, the guide gives you the down-low. I'm having trouble getting my system to "see" the 32GB I have installed. I may need a BIOS flash or something. I believe you DO NEED all four riser boards to be successful. I think I'm going to take mine to a tech guy locally... there's just something I'm missing... If anyone can help ME I'd appreciate the input...