susdu macrumors newbie Original poster Nov 10, 2018 1 0 Nov 10, 2018 #1 did anyone try to put in RAM that is not 2666Mhz? I'm afraid I might cause some harm.
StellarVixen macrumors 68040 Mar 1, 2018 3,397 6,052 Somewhere between 0 and 1 Nov 10, 2018 #2 It might work, but still it is best to use the RAM with recommended speeds.