OWC 8GB (2x 4GB) CL11 DDR3L-1866 PC3L-14900 1.35V / 1.5V DR x8 204-pin SODIMM RAM Kit for Mac (or PC)

OWC 8GB (2x 4GB) CL11 DDR3L-1866 PC3L-14900 1.35V / 1.5V DR x8 204-pin SODIMM RAM Kit for Mac (or PC)


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Product Overview

This 8GB (2x 4GB) DDR3L 1866 MT/s Dual rank, x8 configuration RAM kit for Mac (or PC) from Crucial is for use in DDR3L compatible systems and operates at 1866 MT/s with an overall transfer rate of PC3L-14900.

This RAM kit also operates at a standard voltage of 1.35V / 1.5V with a CAS Latency of CL11, 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. OWC1867DDR3S08S
Capacity 8GB (2x 4GB)
Brand OWC
Speed DDR3L-1866 - 1866MT/s - PC3L-14900
Voltage 1.35V / 1.5V
Technology DDR3L
Error Correction Non-ECC
Signal Processing Unbuffered
Form Factor 204-pin SODIMM
Ranks Dual rank
CAS Latency CL11
Configuration x8
Pieces in Kit 2


You can verify the compatibility of this RAM kit in a number of ways:

  • Use the RamCity Finder to see all guaranteed compatible RAM upgrades for your brand and model system or motherboard
  • Search online to see if this product is on the QVL (Qualified Vendor List) for your system or motherboard
  • Contact one of our Upgrade Evangelists for an expert opinion

Guaranteed Mac Compatible

This RAM kit has been specially designed and proven in OWC's lab and is guaranteed to meet or exceed all Apple specifications. To check compatibility and RAM upgrade options in your Mac, look up your specific model in our dedicated Apple Mac section, and don't be surprised if you can actually upgrade your Mac with double the amount of RAM that was originally specified by Apple.

Here at RamCity we've been upgrading Mac's since 2004 and have experts ready to answer your questions. Just contact us if you need help!

Why is the speed of this RAM kit shown as 1866 MT/s instead of 1866 Mhz?

When it comes to measuring DDR RAM speed, MT/s and MHz are used interchangeably, which is not actually correct.

DDR stands for double data rate which means data is transfers on both the rising and falling edges of the clock signal. Meaning that the transfer rate is roughly twice the speed of the I/O bus clock. This RAM kit runs at 933MHz per second, 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.

Dual Voltage for Newer and Older systems

This RAM kit supports voltages of both 1.35V and 1.5V. If your original installed memory is 1.5V and you are adding a dual-voltage 1.35V/1.5V module to an open DIMM slot, this dual-voltage RAM kit will operate at 1.5V, not 1.35V. If all installed memory modules are dual-voltage 1.35V/1.5V and the system supports DDR3L (1.35V low voltage), then this RAM kit will run at 1.35V.