1600MHz RAM into a 2009 MBP

[AppleTecFan]

I inserted my old 2GB RAM from my 2012 MacBook Pro into my old 2009 13" MacBook Pro - Which has a max rate of 1067Mhz.

Will this cause any problems with the old Mac?

Its been running fine at this point, but if this will cause any problems in the near future I wanna know now

 

[makaveli559m]

Wow that is crazy from what I know only 1066 should only be able to work on a 2009 model.

 

[AppleTecFan]

Wow that is crazy from what I know only 1066 should only be able to work on a 2009 model.

The max speed is set down to 1066 even though the 1600 is inserted

 

[Asuriyan]

I inserted my old 2GB RAM from my 2012 MacBook Pro into my old 2009 13" MacBook Pro - Which has a max rate of 1067Mhz.

Will this cause any problems with the old Mac?

Its been running fine at this point, but if this will cause any problems in the near future I wanna know now

Underclocking RAM of a matching form factor is perfectly normal and a designed function of the system bus and memory controller. It shouldn't cause any issues.

RAM over the last 5 years is much simpler than it used to be. Just a few years ago RAMBUS was competing with DDR, you had to worry about ECC/non-ECC... now there's a lot less compatibility issues to worry about.

 

[jchase2057]

I had 1333 in my girlfriends 2009 and it would crash and ran terrible. I replaced it with 8gb 1066 and all was well.

 

[AppleTecFan]

Underclocking RAM of a matching form factor is perfectly normal and a designed function of the system bus and memory controller. It shouldn't cause any issues.

RAM over the last 5 years is much simpler than it used to be. Just a few years ago RAMBUS was competing with DDR, you had to worry about ECC/non-ECC... now there's a lot less compatibility issues to worry about.

thanks, thats great to know.

I have not ran into any problems yet, and I use the program memtest to check for any memory problems - nothing came up