GeIL Orion DDR4 RAM, 64GB (32GBx2) 4000MHz 1.4V XMP2.0, Intel/AMD Compatible, Long DIMM High Speed Desktop Memory, Hardcore Immersive Gaming/Multimedia Content Creation/Quality Live Streaming at Amazon.com
Corsair Vengeance SODIMM 32GB (4x8GB) DDR4-4000 (PC4-32000) CL19 for Intel X299 Systems - CMSX32GX4M4X4000C19 at Amazon.com
TEAM T-Force DARK Z Alpha DDR4-4000 16GB Memory Kit Review | TweakTown
TEAMGROUP T-Force Dark Z FPS 16GB Kit (2x8GB) DDR4 Dram 4000MHz (PC4-32000) CL16 Desktop Memory Module Ram for Low Latency TDZFD416G4000HC16CDC01 at Amazon.com
Amazon.com: CORSAIR VENGEANCE RGB PRO 16GB (2x8GB) DDR4 4000MHz C19 LED Desktop Memory - Black : Everything Else
Corsair Vengeance SODIMM 32GB (4x8GB) DDR4-4000 (PC4-32000) CL19 for Intel X299 Systems - CMSX32GX4M4X4000C19 at Amazon.com
ThermalTake Releases TOUGHRAM 4000Mhz, 4266MHz and 4400Mhz Models – goldfries
TEAMGROUP T-Force Dark Z FPS 16GB Kit (2x8GB) DDR4 Dram 4000MHz (PC4-32000) CL16 Desktop Memory Module Ram for Low Latency TDZFD416G4000HC16CDC01 at Amazon.com
TOUGHRAM RGB MemoryDDR4 4000MHz 16G (8G x 2)
Amazon.com: Thermaltake TOUGHRAM XG RGB DDR4 4000MHz 16GB (8GB x 2) 16.8 Million Color RGB Alexa/Razer Chroma/5V Motherboard Syncable RGB Memory R016D408GX2-4000C19A : Everything Else
Crucial Ballistix MAX 4000 MHz DDR4 DRAM Desktop Gaming Memory Kit 16GB (8GBx2) CL18 BLM2K8G40C18U4B (BLACK) at Amazon.com
G.SKILL Launches New DDR4-4000 CL16 Memory Kits For Intel 10th Gen Comet Lake-S | HotHardware
Amazon.com: G.Skill 32GB DDR4 PC4-32000 4000MHz Ripjaws V for Intel Z170 / X99 CL18 Quad Channel kit (4x8GB) : Electronics
G.SKILL RAM TridentZ Series - 16 GB (2 x 8 GB Kit) - DDR4 4000 UDIMM CL19 at Amazon.com