G.Skill will soon be upgrading its Trident Z RGB line of DDR4 DIMMs with a 16 GB kit capable of running at 4700 MHz. With the claimed fastest commercial kit of RGB-equipped memory modules, the new 2 x 8 GB kit uses Samsung B-die ICs and supports XMP 2.0 memory profiles. The super-fast memory kit has been in development for quite a while and is slated for availability in Q2 2018.
G.Skill has managed to tighten the timings on its 4700 MHz kit to CL19-19-19-39 while needing only 1.45V which is nice to see. The company has reportedly validated the new memory using a MSI Z370 Gaming Pro Carbon AC motherboard and Intel i7 8700k processor. G.Skill notes that the new kit is notable because it is the first retail kit to hit 4700 MHz as well as the first memory kit with RGB LEDs to hit that lofty memory speed. Corsair comes close at 4600 MHz with its 16 GB Vengeance LPX DDR4 kit at 15-15-15-36 which will set you back a cool $589.99 MSRP.
I am curious on the overclocking headroom on these modules actually (heh). G.Skill is reportedly using highly screened B-dies so maybe the 5,000 MHz its other kits have hit (when overclocked) would be possible. I would like to see AMD’s Infinity Fabric performance at that point when it is not being held back by memory speed especially where its upcoming APUs are concerned. On the Intel side of things, I think tighter timings are preferrable (after a certain threshold of acceptable speed of course) when pursuing the best performance so a "slower" 3600 to 4600 MHz kit at CL15 or lower might be a better buy. In any case, memory continues to be pricey, and I would uess G.Skill's new kit will hit at least $600 MSRP.
G.Skill is not yet talking pricing on these modules, but they aren’t going to be cheap. We should know more in a couple of months as we enter the second quarter.