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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!

OWC Mercury Elite Pro Dock: SD Card Slot Speed

OWC Mercury Elite Pro Dock

Configurations up to 32TB (2 X 16TB). MPG tested the 24TB model incorporating dual Toshiba 12TB MG07ACA12TE drives which are very high performance hard drives.

This page evaluates speed of the SD 4.0 card slot on the OWC Mercury Elite Pro Dock versus the built-in SD slot on the 2019 iMac 5K.

CLICK TO VIEW: OWC Mercury Elite Pro Dock Capacities

Test results: SD Slot

Test mule was the 2019 iMac 5K. The run-sequential-suite command of diglloydTools Disktester was used.

disktester run-sequential --xfer 128M --test-size 4G -i 5

The SD 4.0 card slot in the OWC Mercury Elite Pro Dock trounces the built-in slot on the 2019 iMac 5K, delivering 3X faster read speed. Read speed is by far the most important metric, for fast camera card downloads.

For writes the OWC Mercury Elite Pro Dock runs rings around the 2019 iMac 5K, offering 4X faster write speed.

If you’re looking for a fast SD card reader and need storage at the same time, the OWC Mercury Elite Pro Dock is a fantastic choice.

Vertical scale is MB/sec. Horizontal scale shows transfer size. RAID-0 used 64K stripe size; RAID-5 uses 16K stripe size (default, not configurable).

OWC Mercury Elite Pro Dock: SD card reader speed trounces 2019 iMac 5K
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!



√ No more slow and noisy hard drives!

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