(Part 1) Mixing memory chips. Does it work ? 2666Mhz vs 3800Mhz tested in 8 games

Part 2 Test system i9-9900K @ 5Ghz core & uncore ASRock Z370 Taichi 2x8GB Kingston Value RAM DDR4-2666Mhz (one is Hynix C-die and the other is Micron E-die) EVGA GTX 1080 Ti @ 2126 core / 12474 mem Transcend NVME 220S 1TB Corsair HX 750W NZXT H440 White Custom Water Cooling Windows 10 64 bit 1607 Nvidia Record by ShadowPlay Music: