DDR4 Memory Modules
DDR4 is installed in stationary computers, laptops, monoblocks. Voltages are lowered to 1.2V compared to DDR3. Clock frequency range up to 4400 MHz. More power efficient and faster than its predecessor. But inferior to DDR3 in terms of memory timing due to the specific architecture.
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Memory name
Latency (ns)
Read (MB/s)
Write (MB/s)
Price
Thermaltake Technology Co Ltd R002D408GX2-2666C19D 8GB 
Transcend Information AQD-D4U4GN21-SG 4GB