Below is a list of
single rank ddr4 memory that should be good for those planning on building a ryzen system. But don't quote me on these as I maybe be wrong here(correct me if I am). Always refer back to your motherboard QVL
It will be good if anyone that has bought these and tested working on their system at the advertised speeds or higher up to 3200mhz on their build and report back.
Corsair Vengeance LPX 8GB DDR4 4000MHz
Corsair Vengeance LPX DDR4-3733 2x8GB, single-rank Samsung B-die
Crucial Ballistix Elite DIMM Kit 8GB, DDR4-3200, CL16-18-18 (BLE2C4G4D32AEEA/BLE2K4G4D32AEEA)
Crucial Ballistix Elite DIMM Kit 8GB, DDR4-2666, CL16-17-17 (BLE2C4G4D26AFEA/BLE2K4G4D26AFEA) (1.2V)
Crucial Ballistix Elite DIMM Kit 8GB, DDR4-3000, CL16 (BLE2C4G4D30AEEA/BLE2K4G4D30AEEA)
Crucial Ballistix Sport DIMM Kit 8GB, DDR4-2400, CL16 (BLS2C4G4D240FSA/BLS2K4G4D240FSA) (1.2V)
Crucial Ballistix Sport LT white DIMM Kit 16GB, DDR4-2666, CL16-18-18 (BLS2C8G4D26BFSCK) (1.2V)
Crucial Ballistix Sport LT red DIMM Kit 16GB, DDR4-2666, CL16-18-18 (BLS2C8G4D26BFSEK) (1.2V)
Crucial Ballistix Sport LT red DIMM Kit 8GB, DDR4-2666, CL16-18-18 (BLS2C4G4D26BFSE) (1.2V)
Crucial Ballistix Sport LT grey DIMM Kit 8GB, DDR4-2666, CL16-18-18 (BLS2C4G4D26BFSB) (1.2V)
Crucial Ballistix Sport LT white DIMM Kit 8GB, DDR4-2666, CL16-18-18 (BLS2C4G4D26BFSC) (1.2V)
Crucial Ballistix Tactical DIMM Kit 8GB, DDR4-3000, CL15-16-16 (BLT2C4G4D30AETA/BLT2K4G4D30AETA)
GeIL Super Luce black LED blue DIMM Kit 16GB, DDR4-3000, CL15-17-17-35 (GLB416GB3000C15ADC)
GeIL Dragon RAM black IC DIMM Kit 16GB, DDR4-2400, CL16 (GWB416GB2400C16DC) (1.2V)
Goodram Play BLUE DIMM Kit 8GB, DDR4-2400, CL15 (GYB2400D464L15S/8GDC) (1.2V)
Goodram Play BLUE DIMM Kit 16GB, DDR4-2400, CL15 (GYB2400D464L15S/16GDC) (1.2V)
Kingston HyperX Predator DIMM Kit 8GB, DDR4-3000, CL15-15-15-35 (HX430C15PB3K2/8)
Kingston HyperX Predator DIMM Kit 16GB, DDR4-3000, CL15-17-17-35 (HX430C15PB3K2/16)
Kingston HyperX Predator DIMM Kit 16GB, DDR4-3200, CL16-16-16-35 (HX432C16PB3K2/16)
Kingston HyperX Predator DIMM Kit 8GB, DDR4-3200, CL16-16-16-35 (HX432C16PB3K2/8)
Kingston HyperX Predator DIMM Kit 16GB, DDR4-3333, CL16-16-16-35 (HX433C16PB3K2/16)
Kingston HyperX Savage DIMM Kit 8GB, DDR4-2400, CL12-14-14 (HX424C12SB2K2/8)
Kingston HyperX Savage DIMM Kit 8GB, DDR4-2666, CL13-15-15 (HX426C13SB2K2/8)
Kingston HyperX Savage DIMM Kit 8GB, DDR4-2800, CL14-16-16 (HX428C14SB2K2/8)
Kingston HyperX Savage DIMM Kit 8GB, DDR4-2800, CL14-15-15 (HX428C14SBK2/8)
Kingston HyperX Savage DIMM Kit 8GB, DDR4-3000, CL15-16-16 (HX430C15SBK2/8)
Kingston HyperX Savage DIMM Kit 8GB, DDR4-3000, CL15-17-17 (HX430C15SB2K2/8)
Personally I have tested the geil dragon ram 16gb kit 2400mhz CL16-16-16-36 1.2v(GWB416GB2400C16DC) and manage to OC them to 2933 with CL18-17-17-39 with MEM VDDIO of 1.4v / MEM VTT of 0.7 and stock SOC voltage of 0.9 to be stable. I can clock my ram to 3200mhz boot into windows but it's unstable which I suspect to be my board limitation(Asrock x370 killer sli) which seems to max out at 3000mhz as can be seen in their QVL.
good luck with your builds