No ECC errors showed up from morning till mid-day (we close up our house and that keeps internal temperatures down until early afternoon). This is the core benefit of ECC memory (besides not crashing). Since the ECC memory corrected the bit flips, no data in memory was corrupted, hence files on disk written from memory are not corrupted due to bit flips. Rebooting clears ECC errors and all is well again. Near the operating limit, that is what I saw happening: ECC errors began cropping up as shown below. See also The Thermal Conductivity of Moist Air.
#What does non ecc memory mean pro
My Mac Pro might just be due for another cleaning. If the machine is dusty inside, heat can build up and that would lower the operating temperature dramatically and thus increase the chances for ECC memory errors- clean the dust off the innards of the machine. The 2013 Mac Pro is robust, but its operating range tops out at 95☏. That is why my 2015 MacBook Pro temporarily ceased to operate properly a few weeks ago. I have no air conditioning and with outside temperatures around 110☏, my office was around 95☏ and maybe warmer-oppressive but I’ll take it over 4 feet of rain any day.Ī lot of cold drinks over ice bring down core body temperature, but a computer cannot do that: the problem is that all Macs have limits as to what ambient temperature is acceptable for cooling-things can start breaking down beyond that limit. Recently we saw record-breaking heat in my area with even San Francisco hitting 105☏. Two bit flips in the same 64-bit word of memory and a kernel panic results, so I know that did not happen. Single bit flips can be detected and corrected by ECC memory. 16GB ECC memory modules at 1866 MHz for 2013 Mac Pro
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