Macbook Nvidia (White) Early '09 vs Mid '09 RAM speed

[iAlex]

I've searched but could not find a thread that addresses this (no flames). Both the Early 09' and Mid '09 share the same bus speed but the RAM speed is different 667MHz v 800MHz. I assume the Early '09 will accept the faster DDR2 800Mhz RAM from the Mid '09, but will it run at the faster speed? Is this a firmware issue as the Nvida Macmini (same bus speed) uses DDR3 @ 1067MHz? This seems like a bummer of bottleneck in the bus. :confused:

[NewMacbookPlz]

The early '09 should both accept the 800mhz RAM, and run that RAM at 800mhz if installed.

The 1066mhz DDR3 setup in the Unibody MacBook and MacMini etc is just a faster FSB setup with different memory slots (on the surface). It's not a firmware/software issue.

Don't worry, performance-wise, you'll probably never notice a difference between 667 and 800mhz, and for that matter from 800mhz DDR2 to 1066mhz DDR3 (it's ~5% performance difference)