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OWC Mercury Extreme Pro 6G 4TB SATA SSD Review

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review

OWC pushes capacity to 4TB for its top SATA SSD offering, the Mercury Extreme Pro 6G. Join us as we see what it's all about.

@TylerBernath
Tyler Bernath
Published Mon, Jul 13 2020 8:40 AM CDT   |   Updated Thu, Jul 30 2020 4:20 PM CDT
Rating: 86%Manufacturer: OWC (OWCS3D7P6GS4.0)

With SATA SSDs now almost exclusively delegated to secondary drives, capacity is left pushing this aging tech forward. Recently, OWC announced an additional jump in capacity to 4TB for their top tier Mercury Extreme Pro 6G. With the 2TB model recently reviewed, it's time to see how the additional 2TB of capacity affects performance.

As mentioned when we had the 2TB model in house, the Extreme Pro 6G welcomed a controller change to the Phison S12 in revision 2, and this 4TB takes on its own hardware design as it deploys the Phison S12DC variant for this model alone.

On paper, performance is unchanged the 4TB model offering 550 MB/s read and 530 MB/s write for sequentials and 100K IOPS for random read and write. Additional features include 7% over-provisioning with 128GB allocated to real-time data redundancy and EC. We have a usable capacity of 3968GB and support for NCQ.

The MSRP of the 4TB Mercury Extreme Pro 6G comes in at $899.99 with a five-year warranty.

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review 02 | TweakTown.com
VIEW GALLERY - 11 IMAGES

Once again, we meet back at the cardboard retainer familiar to all OWC 2.5" solutions. Capacity listed top right at 4TB.

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review 03 | TweakTown.com

Included with the drive is a z-height spacer to push the drive to 9mm for notebooks.

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review 04 | TweakTown.com

The bottom of the drive offers model identification along with capacity and regulatory information.

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review 05 | TweakTown.com

A few screws hold the drive shell together.

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review 06 | TweakTown.com

Taking a look at the hardware, we have the Phison S12DC to the right with four DRAM packages, two on this side. Eight NAND packages take up much of the real estate next to blank solder pads, where we would normally find capacitors for power loss prevention.

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review 07 | TweakTown.com

Flipping the drive, we have the last two DRAM packages at the top with another eight NAND packages.

OWC Mercury Extreme Pro 6G 4TB SATA SSD Review 10 | TweakTown.com

CDM is a staple in performance testing; version 7 has seen some updates in the workloads used for testing. Sequential performance tops out at 559 MB/s read and 514 MB/s write with 43 MB/s read and 108 MB/s write for 4KQ1.

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ATTO is yet another popular benchmark for storage performance that breaks down performance based on file size. The Extreme Pro 6G is very consistent in this scenario 256K through 64M holding 534 MB/s read and 492 MB/s write.

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PCMark10 switches things up with the Extreme Pro 6G coming in just behind the Barracuda SSD in quick system drive.

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Full System Drive shows quite well for the 4TB Extreme Pro 6G as well, scoring 960.

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Price/Performance landed the drive just above the BX500 from Crucial at 97%.

With testing out of the way, the 4TB variant of the Mercury Extreme Pro 6G has outstanding build quality backed by the datacenter version of the Phison S12 controller. OWC did save by omitting the power caps, but with the DC firmware in place, it does still get the benefits.

In our testing, the performance of the Mercury Pro 6G was top-notch, reaching 559 MB/s read and 514 MB/s write on par with top tier SATA solutions on the market. 4KQ1 was also rather good at 43 MB/s read and 108 MB/s write. Moving into PCMark10 testing, the Extreme Pro 6G did rather good ending up third in both the Quick and Full System drive charts.

Price is a bit of a concern with the 4TB variant of the Extreme Pro 6G as its current MSRP of $899.99 is almost double of competing solutions like the 860 EVO, 860 QVO, and WD Blue.

Tyler's Test System Specifications

Buy at Amazon

Performance

85%

Quality

95%

Features

95%

Value

70%

Overall

86%

The Bottom Line

OWC has done a fantastic job pushing top end build quality while increasing the capacity of its Extreme Pro 6G to 4TB SATA SSD.

TweakTown award
86%

OWC Mercury Extreme Pro 6G 4TB SATA SSD

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$849.75$899.75$899.75
* Prices last scanned on 8/6/2020 at 8:25 pm CDT - prices may not be accurate, click links above for the latest price. We may earn an affiliate commission.

Growing up in a small farm town, tech wasn't around, unless it was in a tractor. At an early age, Tyler's parents brought home their first PC. Tyler was hooked and learned what it meant to format a HDD, spending many nights reinstalling Windows 95. Tyler's love and enthusiast nature always kept his PC nearby. Eager to get deeper into tech, he started reviewing.

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