I'm curious how one particular company Gigabyte ensures its server motherboards to run at the maximum supported memory frequency even when there're two or three DIMMs per channel (of coure we're talking about RDIMMs and not UDIMMs). What trick they use in such motherboard to achieve that: (look at the overview section)
Some time ago I read a leaflet claiming that on Haswell-E/EP motherboards populating them with more than one module per channel decreases the frequency:
- 1 DPC = max 2133 MHz
- 2 DPC = max 1866 MHz
- 3 DPC = max 1600 MHz
Some other motherboard manufacturers put a condition on their specifications, something like 2133MT/s@1DPC only, whereas Gigabyte boasts that its products reach 2133MHz frequency even with 3 DPC.
How such feature meant to be done?