only if those are quad channel systems?

how much bandwidh per channel? 17GB/s?

the limits for snowblossom in ram dive a bit deeper http://www.crucial.com/usa/en/memory-performance-speed-latency Find out why CAS latency isn't an accurate measure of memory performance and how speed might be a more important factor when looking to upgrade your RAM.

aka why people have the same performance per channel with ddr3 machines from 2010 as with current hardware

and why it peters out at ~800 nanoseconds per seek cycle per channel for snowblossom is hardware complexity

ddr5 is coming https://www.anandtech.com/print/13605/sk-hynix-develops-first-16-gb-ddr5-chip-demos-ddr5-rdimm SK Hynix Develops First 16 Gb DDR5-5200 Memory Chip, Demos DDR5 RDIMM

but intel has good readups upon interest https://software.intel.com/sites/products/collateral/hpc/vtune/performance_analysis_guide.pdf

all the vtune guides are relevant for snowblossom