[Lerc]

This seems remarkably suited to my situation,

    CPU(s): 32
      On-line CPU(s) list: 0-31
    Vendor ID: GenuineIntel  
    Model name: Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz

Also with 128G. Does 8 dimm sockets imply more actual bandwidth in practice?

This poor thing is currently a YouTube watching box.

[miahi]

One thing to note: These Xeons have quad memory channels, that usually means double the bandwidth of an equivalent desktop CPU, if you populate all the slots.

I have a dual E5-2667 v2 server with 512GB DDR3 and it's quite nice, the memory bandwidth is higher than of a DDR4 desktop with a way newer CPU, even though it's ECC and registered.