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Mac Pro Nehalem 4GB modules from OWC testing

Following up on yesterday’s entry on the OWC 4GB modules for the Mac Pro— zero problems, perfect operation and no ECC errors after four hours of stress testing in my 2.93Ghz Mac Pro Nehalem.

The diglloydTools stress test uses all 16 cores and all the free memory in the machine. It doesn’t get any more demanding than that; no conventional program comes close to that kind of workout for the Mac Pro. (Even Activity Monitor thinks it’s loaded, showing more than 1600% CPU usage, the maximum!).

Mac Pro Nehalem pinned at redline
Click to see larger image

The OWC modules are literally 1/3 the price Apple charges, a heck of a deal.

A pair of OWC 4GB memory modules.

There is one “gotcha”: according to OWC, they do not operate with other sizes or brands (this might be true of Apple modules also, not known as yet). Then again if you need 4GB modules, the only appropriate configurations are 24GB or 32GB (12GB or 16GB for the single-processor Mac Pro).

OWC tells me they’ve also tested these modules in the single-CPU Mac Pro Nehalem which has only 4 memory slots, and they work great.

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