原帖由： ABCellars ,
The iFixit one is truly a 4.2K RPM. The difference between the 3.6 & 4.2 is about 15%, slightly above the negligible range. The only real time you will see a real difference in performance is if you are using a lot of virtual memory - having lots of programs open etc... If you are a power user or use programs that require a lot of memory the 4.2 is the one to have - to keep you from drumming your fingers as much. The 3.6 is fine for normal users.