Complex sentence: Rather than working exclusively with DDR4, the Skylake microarchitecture is expected to remain backward compatible by interoperating with either type of memory; new type of DIMMs, called UniDIMM, is expected to be released, capable of carrying either DDR3 or DDR4 memory chips.
Split into simpler sentences: Rather than working exclusively with DDR4, the Skylake microarchitecture is expected to remain backward compatible by interoperating with either type of memory. A new type of DIMM, called UniDIMM, is expected to be released, capable of carrying either DDR3 or DDR4 memory chips.