PE R510 Memory config [MEMTEST Lane Failure]

I have a PE R510 with 32GB of memory running Win2008 Std with a single cpu.

• I upgraded the OS to Enterprise
• I added a second cpu
• I replaced the 4x 8GB sticks of memory with 8x 16GB

On boot, the OS only can use 80GB of memory

I get MEMBIST failure on DIMM B3/B1/B4

MEMTEST Lane Failure detected on DIMM B1

any ideas what the cause is? The mobo? the memory? config? Thanks

These memory sticks are with the new cpu, and were never used before. I have tried moving the sticks and I have reseated them several times with the same problem.