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OWC Accelsior S

Storage Expansion With a Speed Boost

Add a 2.5" SATA 6G Drive to your Mac or PC
  • Directly mount any standard 2.5" drive.
  • Up to 550 MB/s sustained speeds.
  • Enhance SATA 3Gb/s systems with SATA 6Gb/s support.
  • Easy installation. No drivers required.
Give Your Mac Pro Tower or PC a 6G Performance Boost
Accelsior S is the simple solution to add a high speed SATA 6G drive to PCs or silver Mac Pro towers otherwise restricted to 3G architecture. Combined with a high-performance SSD, Accelsior S brings cutting edge 6G performance to your SATA 3G system.
Internal Storage Expansion at Lightning Speed
With more than 500 MB/s of throughput, the Accelsior S dual-lane PCIe 2.0 card delivers flexible storage expansion - with a speed boost - to your Mac or PC. Accelsior S is the perfect complement to OWC's Mercury family of high-performance SSD's, allowing up to an extra 1TB of fast storage expansion.
Just Plug and Play
Mount a 2.5" drive to the Accelsior S, install in any available PCIe x4 (or greater) slot, and you're up and running with expanded high-speed storage. Use as a native, high-speed, boot drive or scratch-disk and boost capacity and performance. With no drivers or extra software needed, upgrading your PC or legacy Mac Pro tower with Accelsior S is a breeze.

Product Specifications:

OWC Part Number

  • SSDACL6G.S

Form Factor

  • full height, half length

PCIe-SATA Bridge

  • ASM1062

Interface

  • PCIe 2.0 x2

SMART Attributes

  • Depends on mechanism installed

AHCI Compliant

  • Yes - Plug and Play installation, no drivers required

RoHS Compliant

  • Yes

Performance

  • Read: up to 550MB/s - this depends on mechanism installed
  • Write: 530MB/s - this depends on mechanism installed

Operating Temp

  • 32°F to 158°F
  • 0°C to 70°C

Non-operating Temp

  • −40°F to 185°F
  • −40°C to 85°C

Acoustics

  • 0.0 bels for both Idle and Seek

Operating system compatibility

  • Mac OS X 10.6 and up
  • Windows Server 2008 and higher
  • Not compatible as a Windows boot drive on a Mac

Supported mechanisms

  • All 2.5" HDD and SSD SATA 1.5, 3.0, 6.0Gb/s
Manufacturer provided specifications for Other World Computing p/n SSDACL6G.S UPC#: 812437021035

Gallery

Drive Compatibility
  • When used together, the Accelsior S and the 2.0TB Mercury Electra 6G SSD are compatible with the MacPro4,1 series and MacPro5,1 series. This device combination is NOT compatible with the MacPro1,1 MacPro2,1 or MacPro3,1 series.
Note about throughput:
  • PC Throughput:
    • PCIe 2.0 x4 slot or better is required. Use of a PCIe 1.0 x4 slot will reduce performance.
  • Mac Pro Throughput:
    • 2009-2010 Mac Pro. Installing Accelsior S into any open x4 or x16 PCIe 2.0 slot will deliver full throughput
    • 2008 Mac Pro. These models have two x16 PCIe 2.0 slots, which enable Acceslsior S to deliver full throughput. Installing Accelsior S into of the two x4 PCIe 1.0 slots will result in Accelsior S being addressed as a gen one, one-lane card with performance limited to real world 190-200MB/s data rates.
    • 2006-2007 Mac Pro. These models utilize PCIe 1.0 slot which cannot be configured (even with the Expansion Utility in OS X) to address Accelsior S as anything but as a first generation one-lane card. As a result, Accelsior S performance will be limited to 190-200MB/s data rates. If maximum data rate speedis desired, we recommend the installation of a 2.5" OWC Mercury SSD in an open Mac Pro drive bay.

This OWC SSD is compatible with: Learn how to find your Mac's model ID
Mac Pro
Mac Pro (Mid 2010 Quad-Core)
(July, 2010)
Model ID: MacPro5,1
2.8GHz, 3.2GHz, 3.33GHz
Mac Pro
Mac Pro 6-Core
(Mid 2010-2012)
(July, 2010 / June 2012)
Model ID: MacPro5,1
3.33GHz
Mac Pro
Mac Pro 8-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
2.4GHz
Mac Pro
Mac Pro 12-Core
(Mid 2010-2012)
(July, 2010 / June 2012)
Model ID: MacPro5,1
2.40GHz, 2.66GHz, 2.93GHz, 3.06GHz
Mac Pro
Mac Pro (Early 2009 Quad-Core)
(March, 2009)
Model ID: MacPro4,1
2.66GHz, 2.93GHz, 3.33GHz
Mac Pro
Mac Pro (Early 2009 8-Core)
(March, 2009)
Model ID: MacPro4,1
2.26GHz, 2.66GHz, 2.93GHz
Mac Pro
Mac Pro (Early 2008)
(January, 2008)
Model ID: MacPro3,1
2.8GHz, 3.0GHz, 3.2GHz
Mac Pro
Mac Pro (8-core)
(April, 2007)
Model ID: MacPro2,1
3.0GHz
Mac Pro
Mac Pro
(August, 2006)
Model ID: MacPro1,1
2.0GHz, 2.66GHz, 3.0GHz
Xserve Intel
Xserve (Late 2006)
(August, 2006)
Model ID: Xserve1,1
dual 2.0GHz, dual 2.66GHz, dual 3.0GHz
Xserve Intel
Xserve (Early 2008)
(January, 2008)
Model ID: Xserve2,1
2.8GHz, dual 2.8GHz, dual 3.0GHz
Xserve Intel
Xserve Quad-Core (Early 2009)
(April, 2009)
Model ID: Xserve3,1
2.26GHz
Xserve Intel
Xserve 8-Core (Early 2009)
(April, 2009)
Model ID: Xserve3,1
2.26GHz, 2.66GHz, 2.93GHz
PC Desktop
PC Desktops
Compatible with Intel / AMD Process based PCs capable with the specifications listed above.
PC Servers
PCIe capable servers
Compatible with PCIe expandable servers with the specifications listed above.
OWC Helios
OWC Mercury Helios
Thunderbolt PCIe
expansion chassis
HP DL 380 G7
NOT COMPATIBLE
HP DL 380 G7
HP DL 380 G8
Dell PowerEdge R620
NOT COMPATIBLE
Dell PowerEdge R620
Dell PowerEdge R620
NOT COMPATIBLE
Dell PowerEdge T620

Includes

Customer Ratings

Write a Review 4.9 / 5 27 out of 30 (90%) reviewers would recommend this product
1 2
Verified Buyer
Reviewer: DrDisk Location: CA Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Huge Speed Improvement! March 20, 2017 Added this to my Early 2008 Mac Pro 3,1 and boot up times improved by factor of 5 and loading Photoshop & Lightroom went from 2 min and 25 seconds to an amazing 20 seconds! Everything appears to be improved! The only issue was Apple's Migration Assistant that didn't copy over all the software perfectly - some items needed to be reloaded.

I would recommend this item to a friend! This review is from DIY Kit: OWC Accelsior S + 1.0TB Extreme Pro 6G Solid-State Drive Bundle.. Customer Videos:

Verified Buyer
Reviewer: Cloudmover Location: Bogota, NJ Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 MacPro 2008 I have a new machine! January 17, 2017 I purchased the PCI card to install an SSD in my aging 2008 MacPro.

Installation was uneventful. It took less than two minutes from opening the Accelsior box, opening the MacPro, installing the card and closing the MacPro.

I am utterly stunned by it's performance! I feel like I have purchased a new machine.

I would recommend this item to a friend! This review is from (*) OWC Accelsior S: PCIe to 2.5" 6Gb/s SATA SSD Host Adapter *Open Box*. Customer Videos:

Verified Buyer
Reviewer: SMcCandlish Location: Oakland, CA Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Great idea, works exactly as expected December 26, 2016 I'm very happy with this, since it frees up a regular drive bay. While it promises performance benefits, I don't really notice any, and would have to use benchmark testing to be certain.

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: AVguy Location: Europe Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Easy to install, just works December 18, 2016 This is the second Acceslior S for me. It was installed in about 10 min. and works perfectly, even as a boot drive in my old Mac Pro 4,1 Perfect.

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: ChrisToronto Location: Toronto, Canada Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Excellent quality, shipping and handling December 5, 2016 Very happy with the product, works as described, it improved the performance of my SSD, moved from cable connection to the PCI connection; good choice the purchase and use of a OWC Accelsior S. Shipping was also fast, the product arrived in perfect condition.

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: Rocketfish Location: London, Ontario Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 As advertised December 2, 2016 Simple to imstall, great support information and guidance for successful OSX transfer.

Works exactly as advertised, couldn't be more pleased with the new speed and agility of my old Mac Pro 3,1

I would recommend this item to a friend! This review is from DIY Kit: OWC Accelsior S + 240GB Electra 6G Solid-State Drive Bundle.. Customer Videos:

Verified Buyer
Reviewer: Noodlegoober Location: Columbia, TN Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Speed, Speed, and More Speed November 23, 2016 I have resurrected my mid-2010 Mac Pro! Before I performed this upgrade, I was suffering through very sluggish performance and a six-year-old OS. I needed to upgrade to at least El Capitan to keep my recording studio up to date and wanted an SSD drive to become my startup disk. Now, my Mac starts up so quickly and my audio programs which normally have these beautiful load screens "while you wait," don't even pop up because the program just opens in a snap! It's impressive. I couldn't be happier with this upgrade. I already want another and have an empty PCIe slot just waiting...

This review is from DIY Kit: OWC Accelsior S + 1.0TB Extreme Pro 6G Solid-State Drive Bundle.. Customer Videos:

Verified Buyer
Reviewer: macmark23 Location: Trinidad and Tobago Age: 55-65 Owned Product: over 6 months
Rating: 5/5 Excellent solution November 21, 2016 This is a great way to deploy a fast SSD in an older MacPro Tower. Highly recommended

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: MP2009 Location: Windsor, VT Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Easy installation and awesome compatibility. November 9, 2016 It really can't be much simpler. You install your SSD on the card with the provided screws, then install the card in your compatible computer, close it up and then power it up. The SSD I used was my boot drive and I didn't have to do anything further. The icon of the drive you install on it shows up with the external disk graphic, but there us no option to eject it by right clicking or dragging it to the trash. A little strange, but doesn't effect anything.

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: rugobert Location: Montréal, QC Canada Age: 45-54 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Perfect November 7, 2016 This piece of hardware works like a charm on my Mac Pro 4.1, love it.

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: LeicaFan Location: Grand Rapids Michigan Age: 45-54 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Worth Every Penny! August 19, 2016 It's allowed me to access the SSD in my 2010 Aluminum Beast MacPro tower vastly faster than when plugged into the built-in Sata bus. If the CPU in your MacPro is strong enough and tasks are bogged down by data read/write speeds then this product should be a must buy,

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: Djderyck Location: Joplin, MO Age: 25-34 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Did the job I needed it to!!! August 15, 2016 While it didn't add what seems to be a significant amount of speed to my computer, (even if it is) it's just enough to keep my 2011 Mac tower going strong for a little bit longer. And for the price (around $50 I think) it's amazing.

I'm a video editor and my 5 year old tower was having trouble keeping up with 4k footage on Adobe Premiere for editing. I love being able to see the footage at highest resolution and wish not to do proxy editing if I don't need to. Using this device allows me to now be able to edit 4k footage on the drive that is attached to. It's also great that I now have another internal SSD drive for my computer.

I'm so glad a product like this is out there and at such an amazing price. Thanks OWC.

I would recommend this item to a friend! Customer Videos:

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: northern CO Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 easy install and works well August 1, 2016 Added a SSD to a rebuilt mac Pro 5.1 and that really improved the boot time, seems about 5x faster, perhaps a bit more.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Santa Cruz, CA Age: 35-44 Experience Level: IT Professional Owned Product: over 6 months
Rating: 5/5 Doubled the speed of my SSD July 17, 2016 This product should be a no-brainer for any Mac Pro Tower owner. Not only does it double your SSD speed but it also frees up a hard drive bay if you need to add a large capacity hard drive.

BUY IT!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Los Angeles Age: 45-54 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 5/5 Great option for older MacPro June 27, 2016 Nice upgrade - stable and good performance. Extra benefit -- it frees up a drive bay for more storage. Easy and quick to install.

I would recommend this item to a friend! This review is from DIY Kit: OWC Accelsior S + 480GB Extreme Pro 6G Solid-State Drive Bundle..

Verified Buyer
Reviewer: Anonymous Location: israel Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 works perfect June 23, 2016 it arrived with no problems, and works very good

I would recommend this item to a friend!

Reviewer: Anonymous Location: LOS ANGELES Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Love it. Had to Reset NVRAM March 17, 2016 I'm a big fan of OWC. Today I installed a Accelsior S and a OWC 1TB SSD drive in a 2010 Mac Pro. Installation was super easy. However, when I started the Mac I only got the white screen of death. I called OWC support and came up with a few ideas. I reset the NVRAM and everything work perfectly. Total installation time including OWC phone call about 10 minutes.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Seattle, WA Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 4/5 This is a good little product - a great way to put a Crucial SSD into a PCIe slot February 28, 2016 It has great speed, and with a Crucial SSD, you get reliability too. I also tried a 2.5" SATA SSHD (hybrid SSD and HD) and found that much less satisfactory.

This card enables you to plug a 2.5" SATA device into a PCIe slot and get much higher speeds than you would otherwise get. I love it.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Vancouver, BC
Rating: 5/5 Reduced my 2008 Mac Pro boot up time for 1 minute 56 seconds February 4, 2016 The shipping to Canada by Purolater was fast. Installation was easy. The 2008 Mac Pro with El Capitan OS identified this SSD as the new external hard drive and asked to initialized. Initialization was easy but few times the computer ejected the SSD and to bring it back it was need to restart. Formatting and cloning the old hard drive to the new one (SSD) was easy. Make it bootable was easy as well. After the computer restart it uses the SSD as boot drive.

The start time was decreased for 1 minute and 56 seconds. It is very good improvement for the old machine.

This not expensive solution will increase my Mac Pro for few another years.

I would recommend this item to a friend! This review is from DIY Kit: OWC Accelsior S + 480GB Extreme Pro 6G Solid-State Drive Bundle..

Verified Buyer
Reviewer: Anonymous Location: Florida Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Excellent way to go for Mac Pro January 15, 2016 Put this in my Mac Pro 4,1 with a Samsung SSD 850 EVO 500GB. Everything just worked right from the start. Been using it for a month and a half under El Capitan with ZERO problems. If you have a Mac Pro and have a SSD on a SATA 2 connection, this will be a significant improvement in performance. Price/performance on this with a speedy SSD makes the purchase decision a no-brainer.

I would recommend this item to a friend!

Reviewer: Anonymous Location: Torrance, Calif. Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Bring your Mac 2009-2012 up to speed! January 10, 2016 Anybody looking to speed up their boot drive, or an audio/video internal drive should look at this solution; cheap, simple, and SSD agnostic.

I did some "real world" speed tests this weekend, and used the venerable BlackMagic testing tool for various situations with my OWC products. Your mileage may vary, of course, and I'm using the harshest "averages" for speed and not the "fastest peak" speeds which were up to 10% faster typically with my test setup.

Info shared for some real world speed testing which shows adding this to your MacPro Tower is a no brainer - period. Get this thing !!!

BLACKMAGIC DISK SPEED TEST/1.9.16+1.10.16 Music Mac (Mac Pro 5,1; 8 core/Xeon; 32GB DDR3; OSX Yosemite 10.5) -- average read/write**; not peak or low /5GB test -- (1) write 138.8 MB/s || 138.7 MB/s (2) write 165 MB/s || read 233.9 MB/s (3) write 185.4 MB/s || read 237.6 MB/s (4) write 185.4 MB/s || read 378.5 MB/s

(1) = Audio drive, WD Velociraptor 1TB 10K/RPM HD; 3GBS/SATAII-BUS (2) = Boot Drive, 240GB Mercury Electra 6G SSD; 3GBS/SATAII-BUS (3) = OWC Mercury Elite Pro Qx2 RAID(1+0) stripe+mirror (2+2); HGST 6TB Deskstar/NAS 7200RPM x4; external/Newer Technology MAXPower PCIe eSATA 2-Port SATA 6G. (4) = Boot Drive, 240GB Mercury Electra 6G SSD => 6GBS/PCIe 'Mercury Accelsior S' Card

All drives/hardware sourced from OWC/MacSales.

**(NOTE: SSDs use compression for speed, which doesn't work as well with audio/video files, so the "actual" WRITE speed is usually half as much as "advertised" for most A/V work vs small uncompressed files.)

Obviously the SATAIII/6GBS bus speeds up legacy Mac Pro no matter how you slice it, either internal card or external eSATA card.

:-) CLS

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Toronto Age: Over 65 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 Used with Mercury SSD January 3, 2016 On a 2006 Mac Pro 1,1, used this as the startup drive

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Age: 45-54 Experience Level: Hobbiest Owned Product: 1-3 months
Rating: 5/5 Great Addition! January 1, 2016 Fast shipping and no issues with the item. Very Satisfied!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Upstate NY Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Trouble-free installation and operation November 12, 2015 The Accelsior PCIe card couldn't be easier to use. I just installed my OWC SSD on the card, put the card in my 2009 Mac Pro, started it up, and I was off and running. No drivers, not a hint of a problem in the month or so I've had it, and it makes my Mac Pro seem even a bit more zippy than it already was with a previous OWC SSD in a drive tray.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: omah, ne Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Z800 Boot Volume October 18, 2015 I had the onboard raid controllers saturated with ssd's on the intel raid and spindle drives on the lsi chip. i am using the OWC Accelsior S as my boot volume. it is great with a toshiba q series 256 gb drive or an intel 530/535 series 240 gb drive.

I would recommend this item to a friend!

OWC Accelsior S Storage Expansion With a Speed Boost Mfr P/N: SSDACL6G.S MacSales.com SKU: OWCSSDACL6G.S PCIe to 2.5" 6Gb/s SATA SSD Host Adapter. Storage Expansion With a Speed Boost. Directly mount any standard 2.5" drive with speeds up to 550MB/s. No drivers required. 3 Year OWC Limited Warranty Ships: Same Day Only $64.99CyberSaver $49.75
Add to CartOther World Computing SSDACL6G.S In Stock, Click to Buy Now
Additional Capacities & Kits: 6G SATA Storage Expansion
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