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Ram speed

The computer motherboard have ram speed specification, the CPU also have ram speed specification. When i buy a ram is that must suite both specification. Example a good motherboad can support DDR3 1866, but the CPU only can support DDR3 1333. can i use theDDR3 1866 in this system.
3 Solutions
Sushil SonawaneCommented:
Yes u can use DDR3 1866 RAM in the system.
Tony GiangrecoCommented:
Every motherboard has a max ram speed listed in it's specs. You use the Max ram speed, not the speed the CPU can use.
Scott CSenior Systems EnginerCommented:
Yes, in fact you can buy even faster memory, it will just throttle back to the max speed of the motherboard.

This can be a good strategy so that if you buy a motherboard in the future that will support faster RAM you won't need to re-buy it.
kianhowAuthor Commented:
Scott CSenior Systems EnginerCommented:
Thank you.  Just curious though...why the B rating?
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