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Upgrade the memory of your 2020 iMac up to 128GB

OWC Mercury Electra 6G 960GB SSD: Aggregate Throughput in OWC Thunderbay Mini

OWC Mercury Electra 6G SSD

OWC Mercury Electra 6G 1TB about $449. Thunderbay Mini starting at about $379 without drives. Thunderbay Mini with 4 X 1TB SSD about $2399. RAID-5 edition optional.

MPG previously tested the throughput of the OWC Thunderbay 4 Mini with 4 X 240GB SSD.

The test is repeated here with four OWC 1TB Mercury Electra 6G SSDs, a new model released in December 2014.

  • 4 OWC 1TB Mercury Electra 6G SSD
  • 4 volumes, one per drive
  • 4 DiskTester fill-volume tests running simultaneously, one per volume.

Test results

disktester fill-volume --xfer 128M (per volume)

These speeds are real-world throughput through the OS Xfile system via four processes operating simultaneously on four volumes/drives.

The Thunderbay Mini with four OWC SSDs delivers an outrageously good performance that represents best of breed / best possible: when used simultaneously the Thunderbolt 2 bus is the limiting factor. Performance here is even a little better than the same with the OWC 240GB Mercury Extreme Pro 6G SSDs.

Aggregate* write: 1344 MB/sec
Aggregate read: 1382 MB/sec

Single SSD write: 336 MB/sec (simultaneous with 3 others)
Single SSD read: 345 MB/sec (simultaneous with 3 others)

* Aggregates and averages exclude the spikes at end. Aggregate is a simple total; the speed spikes at beginning and end are when one or two drives starting/ending the test a few seconds earlier/later leave the others free to operate at full speed. The flat-lined areas in the center represent a throttling by the Thunderbolt bus.

4 OWC 960GB Mercury Electra 6G SSD, aggregate throughput in OWC Thunderbay 4 Mini
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



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OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!

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Sony Alpha a7 II Mirrorless Digital Camera (Body Only)
$1398 $898
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