07-25-2016 06:23 PM
I got ddr3L PC3-12800 1600 MHz So-dimm 204 pin that came with m y laptop.I got a pny DDR3 pc3-12800 DDR3 I got and my question can you mix the ram or it got to be the same in a MacBook Pro?
Could this be the prob in Mac 10.11.6 I have slow boot up yes I am using ssd?
07-25-2016 08:29 PM
Did you just update to Mac 10.11.6?
If it was starting fast and is not doing so now more ram probalby won't make a difference.
Your SSD should boot you up pretty fast.
I read some issues from other users about problems after updating to Mac 10.11.6
07-26-2016 07:03 AM
What? Could you try to say that again.
07-26-2016 08:39 AM
Both ram sticks no matter Mac or PC must have the same speed. Since it's an Intel processor being used now, if you have two ram sticks and they have different speeds, for compatibility reason, the lower speed ram stick downclocks the faster one if it supports it. If it does not, you will run into lots of problems.
07-26-2016 09:41 PM
Ram stick one has a 100mhz bus speed
Ram stick 2 has a 133 mhz bus speed.
If you use both, the motherboard is forced to downclock stick number 2 to 100mhz if it supports downclocking for compatibility reasons. This can open up a wide range of compatibility issues and a much slower computing experience. Both sticks should match types and bus speeds for maximum performance.