Intel's Haswell-E powered "DDR4 Reference Test Platform" made a brief appearance at this year's Intel Developer Forum.
The folks over at Xbit Labs managed to spot Intel's "DDR4 Reference Test Platform" at this year's Intel Developer Forum, which as you might expect, is the world's first system to be powered by Intel's upcoming Haswell-E processor.
Though they weren't able to provide any details except for noting that the system was "running fine," they did note that the system was likely to have been powered by the X99 "Wellsburg" chipset and that the Haswell-E processor will continue to feature a quad-channel memory control that will provide "enough memory bandwidth for [an] eight-core central processing unit."
As is the norm for upcoming products, the report should be taken with a grain of salt. We expect to have more information closer to the release, which according to unconfirmed reports, will be in Q3 / Q4 2014.