It is found in the BIOS under Memory Settings, it is default normally. 

 

Gavin2812,

The R410 does indeed support 128GB of memory, but that is only with dual processors installed and in Optimizer mode, as you can see here. It would be achieved with the sets of 16GB dimms.

 

Hi, Many thanks for your reply, yes it is a dual processor server. Is that 'optimizer' mode set in BIOS? Thanks!