Okay one say it does not and one say if it does, it'll run at the same speed as the cheaper 1066 were can i find solid info on this as i want to be 100% sure before i buy.
Okay one say it does not and one say it mite were can i find solid info on this as i want to be 100% sure before i buy.
Judging from the situation on Intel PCs (and from previous Mac models), if you put higher-clock RAM into a board, the RAM will work, but will run at the slower speed of the board, not at its capable speed.
Since 1333MHz RAM is more expensive, and wouldn't run at full speed anyway, it's unlikely you're going to find any concrete information about this particular scenario, since few people would bother.
Make sure that it is the same number of pins / SODIMM form factor. It should work, but the speed the RAM is being run at is determined by the motherboard, not the stick of RAM itself. So even if you put in RAM that is rated for a higher speed, it will still run at the default.
Judging from the situation on Intel PCs (and from previous Mac models), if you put higher-clock RAM into a board, the RAM will work, but will run at the slower speed of the board, not at its capable speed.
Since 1333MHz RAM is more expensive, and wouldn't run at full speed anyway, it's unlikely you're going to find any concrete information about this particular scenario, since few people would bother.
That's how it works on any computer. The RAM, regardless of clock speed (when higher than the spec'd bus speed), will run at the bus speed.
Okay one say it does not and one say it mite were can i find solid info on this as i want to be 100% sure before i buy.