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can you mix 667MHz DIMMs with 800MHz DIMMs

210 Views 1 Reply Latest reply: Jan 31, 2013 7:03 AM by The hatter RSS
Mickey Oksner Calculating status...
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Jan 30, 2013 4:20 PM

I'm purchasing a newer Mac Pro with the faster 800MHz DDR2 DIMM.  What are the consequences of adding 667MHz DIMMS to increase memory?  Does the larger bank of memory offset the slower speed?  Is there any potential damage to the hardware by mixing  the two different speed DIMMS?

Mac Pro, Mac OS X (10.7.5)
  • The hatter Level 9 Level 9 (58,540 points)
    Currently Being Moderated
    Jan 31, 2013 7:03 AM (in response to Mickey Oksner)

    run at the slower speed. "Cost" is small 4% hit.


    8 DIMMs though offers 17% better memory bandwidth performance than using less DIMMs


    Amazon has new highest quality 667s @ $33 2x2GB kit making them very affordable.

    If you need 4GB DIMMs, that is when price jumps very high.


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