So I'm thinking about putting an SSD in Macbook Pro...

[Nannou]

To get DDR speed you need to have 2 sticks regardless. That's what is called Double Data Rate.

If you have one stick of 1066 DDR 3 memory then it is really going to be running at 533 unless you install another stick.

juz sayin

Sorry to get nerdy, but that's not technically true. DDR2, DDR3, / "Dual Channel", "Triple Channel" are different things. Dual/Triple Channel are governed by the motherboards features, and in actual practice haven't shown to give significant boosts in performance in most real-life scenarios.

Simply put - one stick of 1066mhz DDR3 will not to drop to 533mhz because it lacks a second stick. It'll run at 1066mhz regardless of how many other modules are present.
What you lose out on (with one stick) is the "Dual Channel" aspect, which doesn't really give that much of a boost anyways.

However given a choice of 1 stick or 2. I'd definitely go with 2 sticks.

[bigheadmikelove]

I was under the assumption that your motherboard's bus speed determined at what frequency your ram was clocked at, and the chip specification was a guideline of sorts... I could be totally wrong though