The 4GB DDR4 Trident Z module was overclocked to a mind-boggling frequency of 2501.2MHz (5002.4MHz effective), under LN2, of course, and with MSI's Z170I Gaming Pro AC motherboard and Intel Skylake Core i5-6600K CPU. The culprit is a well known Toppc overclocker and this score was enough to secure him the first place on HWBOT's memory frequency list. The latency was set at 31-31-31-63 so it is obvious that the focus was on frequency and not the latency. It is also quite surprising that the overclocking was done on MSI's mini-ITX motherboard..
The 5GHz frequency was a holy grail for quite some time and it does not come as a surprise that G.Skill is quite proud that its modules were first to hit the magical mark. G.Skill's Corporate Vice President and Director of R&D, Tequila Huang said that the company is "extremely excited to achieve this great milestone together with Samsung components and MSI motherboard" and that they "will continually push hardware performance to the limits and provide enthusiasts with even more advanced products."
Previous memory frequency record on HWBOT.org of 2450.8MHz was held by Chi-Kui Lam on G.Skill's Ripjaws 4 DDR4 module, so there is certainly a pattern here. Hopefully it won't be long before we see DDR4 pushed even further.
Recently, G.Skill has announced its newest 16GB (8GBx2) high-performance DDR4-4266 Trident Z kit, so hopefully we wan't wait too long for higher frequency records.
The validation screenshots can be seen below, while you can find more details at the HWBOT.org site or the CPU-Z validation page.