This could pay off best when buying the largest capacity sticks that you can put into your machine and then carry your memory upgrade with you as you upgrade to newer computer/s. This might be a really good option for you if you frequently buy new computers, eg. The only benefit is that for newer computers that you may purchase that can accept PC3-10600, you will already have the faster memory to put in it and you will not have to re buy your memory upgrade. However, your system will operate at the speed of the slowest memory module.
Memory is designed to be backward-compatible, so generally speaking, you can safely add faster memory to a computer that was designed to run slower memory. The Memory you have noted PC3-10600 is backwards compatible with PC3-8500 as noted here by Crucial "Memory speeds and compatibility" article.
So you're trading an imaginary upside for a real downside. Lastly, if you compare the 2 chips you linked you'll notice that the 1333 memory has a CAS latency of 9, while the 1066 has a lower (better) latency of 7.
MACBOOK PRO EARLY 2009 SPECS INSTALL
This is why I advocate sticking as closely to the specs as possible.Īs to the advantage of possibly installing the RAM in a future computer, in 2 years you'll probably be able to get twice the RAM for the price (and be wanting to install twice the amount too.) You can find similar stories all over Apple forums.
However it can cause problems one example from the Apple Support Forums. More often than not your mac will accept higher speed RAM. There's no benefit in going with faster RAM because the speed is limited by what your motherboard supports (the early 2009 iMac has a 1066 Mhz frontside bus.) In theory the faster RAM should be able to work at the lower speeds and should be safe to install, however macs do tend to be fussy when it comes to RAM so I would recommend sticking to the RAM recommended in the system specs.
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