CPU / RAM speed mismatch 1066 vs 1333

I have an Asus P6X58D-E motherboard with an i7 960 chip that runs at 1066.

Currently I am also running 1066 memory (2GB x 3 DIMMs)

I want to upgrade to 4GB DIMMs but all of the 1066 modules on the Asus' Qualified Vendor List have been replaced by 1333 chips.

The motherboard supports 1333.

Will it matter if my CPU is slower than the memory? Am I going to run into weird timing issues?

Thanks in advance for answering such a rudimentary question.
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More about cpu ram speed mismatch 1066 1333
  1. Best answer
    There will be no problem with running faster memory. It will either continue to run at 1066 or the MB will OC it to its default 1333. Either way, there's no issue.
  2. Thank you.

    I am curious about what you mean when you say the motherboard will OC it.

    Do you mean the motherboard will try to OC the CPU to run at 1333 to match the memory?

    If so, it's a good thing I put that liquid cooler on it. ;)
  3. Some MBs have the option to run the RAM at their SPD rating automatically or by a manual change in BIOS. More than likely, in your case the RAM will default to 1066MHZ. No need for extra cooling either way. Your liquid cooling I presume is for your processor. It won't get any warmer. The FSB will stay the same. Just the memory multiplier will change if it runs at 1333MHZ.
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