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OWC Accelsior Pro Q vs Accelsior: Real World Throughput

Get OWC Accelsior Pro Q and OWC Helios and OWC SSD at MacSales.com.

For 3+ years my scratch volume for Photoshop and other programs has been a pair of 960GB OWC Mercuy Accesior PCIe SSD cards in an OWC Helios 2 enclosure via Thunderbolt.

With the OWC Accelsior Pro Q offering nearly double the speed of the original Accelsior, I wondered how much faste IntegrityChecker would run with the higher available bandwidth, particularly using a striped pair of both cards as a RAID-0 stripe.

CPU utilization and throughput was considerably higher with the Accelsior Pro Q, showing that for certain real world tasks, I/O performance can make a considerable difference in performance.

4TB Accelsior Pro Q as 2 X 2TB stripe: 6.3 CPU cores, 2009 MiB/sec = 2106 MB/sec
    2TB Accelsior as 2 X 960GB stripe: 3.7 CPU cores, 1127 iMB/sec = 1182 MB/sec

- OWC Accelsior PCIe SSD cards in single OWC Helios 2 enclosure*.
- OWC Accelsior Pro Q PCIe SSD cards in two OWC Helios enclosures on 2 Thunderbolt busses.

- I/O size tested up to 128MB transfers; speed was the same with 8/64/128MB transfers, presumably since IntegrityChecker uses sophisticated I/O techniques.

* Accelsior performance would not likely be faster in dual enclosures on dual busses, since the read speed is about 250 MB/sec below what the Thunderbolt bus can handle.

Integrity Checker verify MB/sec: 2TB OWC Accelsior Pro Q RAID-0 vs 960GB Accelsior RAID-0
Integrity Checker verify CPU usage and throughput with 2 X 2TB OWC Accelsior Pro Q RAID-0 stripe
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