While all the Skylake minds are already in the DDR4 cloud, a lot of people are still running DDR3 memory in their system. HW-DB had a look at a relative newcomer on the DRAM market, Klevv, and tested two kits: the Urbane and Genuine 8GB DDR3-2400 kits.
The Urbane overclocks to a healthy DDR3-2933 C12-14-13-16 using 1.77V while the more higher-end Genuine kit could do DDR3-3000 C12-14-14-16 using only 1.68V. As the author indicates in the article, "The overclocking properties of all Hynix-based DDR3 modules can generally be described as follows. If the CAS latency is kept without change, then the dependency between stable frequency and necessary voltage is almost linear. What comes to the rest of primary timings (tRCD, tRP and tRAS), the minimal stable values depend primarily on the memory frequency with voltage playing a secondary role in the borderline areas."
For more information and details, check out the review at HW-DB.com.