Samsung 1GB (1x 1GB) DDR2-667 PC2-5300 1.8V DR x8 200-pin SODIMM RAM Module Classification_ram-ddr3l-1333-rdimm-8gb-2x-dr CT8G4WFS824A Capacity 8GB (1x 8GB)

CT8G4WFS824A Capacity 8GB (1x 8GB) Brand Crucial Speed DDR4-2400 - 2400MT/s - PC4-19200 Voltage 1

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

This RAM kit runs at 400MHz per second

To check compatibility and RAM upgrade options in your Mac

x8 configuration RAM module for Mac (or PC) from Crucial is for use in DDR3L compatible systems and operates at 1066 MT/s with an overall transfer rate of PC3L-8500

Samsung 1GB (1x 1GB) DDR2-667 PC2-5300 1.8V DR x8 200-pin SODIMM RAM Module Classification_ram-ddr3l-1333-rdimm-8gb-2x-dr CT8G4WFS824A Capacity 8GB (1x 8GB)Product Overview This 1GB (1x 1GB) DDR2 667 MT s Dual rank, x8 configuration RAM module from Samsung is for use in DDR2 compatible systems and operates at 667 MT s with an overall transfer rate of PC2 5300. This RAM module also operates at a standard voltage of 1. 8V and is designed to allow you to run more applications simultaneously, switch between them faster, and provide a smoother computing experience. Technical Specifications Part No.