3/7/2023 0 Comments Macbook pro ssd drive amazonOf course almost no one would have a task that requires this magnitude of data transfer in the real world, and even then the performance is still quite good, even with a slowdown. The results for reads here are in excellent agreement with the test above: a bit over 5GB/sec, which is far above the ~3.3GB/sec achievable in prior Macs. Based on invoking the test a 2nd time, it appears that the SSD speed “regenerates” after the first test, so long as there is some time in-between. But when not degraded, the 7GB/sec figure is pretty awesome.įurther research is needed. ![]() Turning to thermal throttling as a theory, why the sudden plummet? With thermal throttling, one would expect a steady degradation, not an abrupt change.Įven the degraded write speed is in line with prior internal Mac SSDs (3.2 to 3.3 GB/sec) on iMac 5K, Mac Pro, etc. Which makes no sense for a 2-tier design (1/3 fast flash, 2/3 slower). The plummet occurs at file 479 of 1000, equating to 1331 GiB = 1430GB, or about 35% of the 4TB flash drive. To see an abrupt breakdown in SSD write speed for sustained writes suggests a 2-tier flash drive. Write behavior is unlike anything MPG has ever seen in an Apple internal SSD.
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