Earlier this week, Corsair claimed the world's first with its own Vengeance DDR4 SO-DIMM kit running at 4,000MHz with CL19 latency at 1.35V, and today, G.Skill decided to up the ante with its own Ripjaws kit by pushing the same frequency with a slightly tighter latency and same voltage.
G.Skill was quite keen to note that two months ago it introduced its quad-channel Ripjaws DDR4-3800 CL18-18-18-38 SO-DIMM kit for SFFs but now it has managed to hit 4,000MHz frequency with tighter CL18-18-18-38 latency at the same 1.35V voltage.
As expected, the 32GB (4x8GB) kit is based on hand-binned Samsung B-die DDR4 ICs and has already been tested on ASRock's X299E-ITX/ac mini-ITX motherboard with the Intel Core i9-7900X CPU.
Bear in mind that these kits are solely aimed at small form-factor PCs (SFF PCs) where all four modules can be used and pushed to that frequency.
According to G.Skill, the new Ripjaws 32GB DDR4-4000 CL18 SO-DIMM kit should be available in retail/e-tail in Q1 2018.