
The speed of the PCIe connection will vary between different models, and we measure the speed by counting the number of lanes that the connection supports. The new 2017 iMac has a PCIe connection with 4 lanes, and if you chose to have your iMac shipped with an SSD (Flash Drive) then it will have a read speed of approximately 2,800MB/s. This Flash Drive is almost 5 times faster than the fastest SATA SSD, though the technology is more expensive. It may be that your current hard drive is nearly at full capacity, and simply swapping over to a Flash Drive at the same size won’t help.

#Late 2013 imac memory upgrade upgrade#.
