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Helpful answers
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Jul 19, 2016 9:43 AM in response to jorgejuniorrby lllaass,★Helpful1333 MHz RAM will work fine provided the manufacturer says they will work in a 2012 Mac Pro.
The only problem you may have is mixing different memory speeds.
Also you can mix ECC and non-ECC memory
Also, you can't mix registered and non-registered RAM. Typically 16 GB and larger sticks are registered.
I upgraded the memory I my 2013 Mac Pro (1866 MHz) and the removed memory worked fine in my 2009 Mac Pro but ran at 1066 MHz
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Jul 19, 2016 9:56 AM in response to jorgejuniorrby JimmyCMPIT,★HelpfulApparently yes, but you may wish to call OWC as this info came off their site for the mid 2010 mac pro
1333MHz & 1066MHz ECC Mac Pro Memory Information
- Up to 128GB of Total Memory
- 4 or 8 Total Slots
- Apple Specified Thermal Sensor
- DDR3 PC3-10600 ECC 1333MHZ or PC-8500 ECC 1066MHz
- 72 Bit (64 bit + 8 bit ECC)
- High-Performance Multi-Channel