Samsung 64GB (1x 64GB) DDR4-2133 PC4-17000 1.2V QR x4 ECC Load Reduced 288-pin LRDIMM RAM Module Model_iMAC_19_1 but the effective rate is

but the effective rate is 1866 megatransfers per second (MT/s) because there are 933 million rising edges per second and 933 million falling edges per second of a clock signal running at 933 MHz

x4 configuration RAM module is for use in DDR2 compatible systems and operates at 667 MT/s with an overall transfer rate of PC2-5300

here’s what the manufacturer warranties say:

RM2911 Capacity 16GB (2x 8GB) Brand Ramcity using Micron chips Speed DDR4-2666 - 2666MT/s - PC4-21300 Voltage 1

HMT451U6BFR8C-PB Capacity 4GB (1x 4GB) Brand Hynix Speed DDR3-1600 - 1600MT/s - PC3-12800 Voltage 1

Samsung 64GB (1x 64GB) DDR4-2133 PC4-17000 1.2V QR x4 ECC Load Reduced 288-pin LRDIMM RAM Module Model_iMAC_19_1 but the effective rate isProduct Overview Dramatically improve performance and handle larger user and application workloads in your mission critical workstations and servers with this 64GB (1x 64GB) DDR4 2133 MT s 288 pin LRDIMM RAM module from Samsung . This Quad rank, x4 configuration RAM module is for use in DDR4 compatible systems and operates at 2133 MT s with an overall transfer rate of PC4 17000. This RAM module also operates at a standard voltage of 1. 2V and is