Which RAM is suitable? 1866 MHz or 2133 MHz DDR3L?

[khaidir77]

Which RAM is suitable? 1866 MHz or 2133 MHz DDR3L?
Hi there,

I got these 2 pairs of RAM:

• 1866MHz DDR3L - 8 GB x 2 Kingston HyperX Impact Black
• 2133 MHz DDR3L - 8 GB x 2 G.Skill RipJaw

Can someone tell me which one is suitable for my system: MacBook Pro 15" 2.6GHz i7 (Mid 2012)?

Also running with two 2TB Samsung 850 EVO SSD in a RAID 0 setup.

 

[DeltaMac]

If you must use out-of-spec RAM, then the Kingston would be a better choice between the two. (Not your best choice, imho, as I have had "challenges" with Kingston RAM in the past
Better, in my opinion, would be to use the specs that Apple calls for: DDR3-1600MHz 204 PIN SODIMM
DataMemorySystems has great support for the Mac.
https://www.datamemorysystems.com/a...2-6ghz-15-md104ll/a-mid-2012-memory-upgrades/
(Good prices, too...)

 

[Patcell]

As mentioned, your best option is to stick with the original spec (1600mhz DDR3). Putting in higher clock RAM than supported will at best under-clock to 1600mhz, and at worst crash the system.