Doubt its the case. All ddr4 promises is more density per ic memory chip. 4-16Gb chips mounted per module.
Cant see why you would need more than one if it contained enough ram with the improved independent handling of each ic mounted per module.
Just pulled this from xbit.
The next year’s enthusiast desktop platform will pack a number of firsts and will naturally bring a significant performance boost over regular desktop platforms as well as over existing and incoming HEDT solutions based on code-named Ivy Bridge-E processor. Intel Core i7 “Haswell-E” central processing units will pack six or eight x86 cores with Haswell micro-architecture and Hyper-Threading technology, 20MB of L3 cache, quad-channel DDR4 memory controller (2133MHz maximum clock-speed, up to one DIMM per channel) as well as Turbo Boost 2 technology, reports VR-Zone web-site, which published the slides from Intel’s roadmap. The processors will traditionally have 40 integrated PCI Express 3.0 lanes, but will lack built-in graphics adapter, which is logical.
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Quad channel or one DIMM per channel.
So in a context if you felt the need for quad channel you could.
Or one fat stick will do
How much total ram a board could handle and how it will be utilised in the future is the question
Edit: surely you could have enough ram to fit the whole os drives data in memory if they programmed for it then only use the physical drive for modify writes
Edit2: looks like zero benefit until the bottleneck of memory controller is updated and incorporated into new motherboards. Also will need those new cpu's to accommodate ddr4.
In about 18-24 months it may be a good proposal... It may be all there is to buy as production and reserves of ddr3 deplete.
Eight cores 140 watt thermal design and programming in mind it will come together... With a two year premium to dissuade. Lol
Spend aside give me low density ddr3 over as many slots as possible suits my needs better (none gamer wise)