14 DAY TRIAL // The DDR4 memory technology is relatively young at the moment, with only a select few ultra high-end workstation motherboards even having support for them. Those powered by the X99 chipset from Intel.
This does, however, mean that all the tools needed to perform great overclocking feats are already available.
Which is to say, a powerful chipset (the X99 we already mentioned), good mainboards based on them (in this case the ASUS Rampage V Extreme), and a mighty central processing unit (the Intel Core i7-5960X).
All these things came together recently and enabled G.Skill to set the new record in terms of DDR4 performance, leading the clock of its best Ripjaws to 4,255 MHz while latencies were of CL 18-18-18. The CPU-Z validation has already been submitted and acknowledged.
For comparison, the previous record was 4,032 MHz on an MSI X99S SLI PLUS motherboard, set by Kingston HyperX modules.
Liquid nitrogen had to be used for the overclocking run, however, so don't try this at home unless you have access to the same resources.
Normally, DDR4 operates at 2,133 MHz. But when even DDR3 can go above 4.5 GHz, you can be sure that enthusiasts and PC hardware companies themselves will do all they can to bring DDR4 well above that level.
