Originally Posted by shiftlocked
I just found some spare ddr2 lying about (as you do) and want to us it in my mac book, The only problem is that the memory installed is 667 ddr 2 and this stuff is 533.
Will the new stuff work and will it make that much of an impact running it at a slower speed
It will most likely clock your 667 ram down to 533. I cant imagine you'll see much difference unless you are gaming on or benching you mac
So the extra mem will probably be more beneficial.