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Compatibility

Compatible with SATA 1.5Gb/s, 3Gb/s, and 6Gb/s eSATA equipped storage solutions.*

PC Throughput

PCIe 2.0 x2 slot or better is required for full throughput up to 820MB/s. Use of a PCIe 1.0 x2 slot will reduce performance.

Mac Pro Throughput

2009-2013 Mac Pro silver towers

Installing Accelsior E2 into any open x4 or x16 PCIe 2.0 slot will deliver full throughput up to 688MB/s.


2008 Mac Pro

These models have two x16 PCIe 2.0 slots, which enable Acceslsior to deliver full throughput up to 688MB/s. Installing Accelsior E2 into one of the two x4 PCIe 1.0 slots will result in Accelsior E2 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 E2 as anything but as a first generation one-lane card. As a result, Accelsior E2 performance will be limited to 190-200MB/s data rates. If maximum data rate speed up to 285MB/s is desired, we recommend the installation of a 2.5" OWC Mercury SSD in an open Mac Pro drive bay.

eSATA Expansion Ports

Compatible with all eSATA equipped storage solutions.*

Dual Card Use
/ Booting

Dual Accelsior_E2 Usage

The use of two or more Accelsior_E2 SSDs requires OS X 10.6.8 or later.


Windows booting is only supported in slot #3 on a 2008 Mac Pro (with model ID MacPro3,1). To boot Windows on an Accelsior E2, only one Accelsior E2 can be installed at a time. OWC Dual Boot Enabler for Apple Boot Camp required for use with Boot Camp utility. Download here.


2006-2008 Mac Pro (with model ID MacPro1,1; MacPro2,1; MacPro3,1)

Due to an Apple limitation, any volume located on a Mercury Accelsior_E2 SSD will not appear in the "option boot" menu. A volume installed on an Accelsior_E2 can be set as the Mac Pro's boot volume through the "Startup Disk" pane in System Preferences. See how to find your Mac's model ID

Mercury Accelsior E2 is compatible with...

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 Mercury Elite Pro Qx2
OWC Mercury Elite Pro Qx2
4-Bay RAID Storage Solution
OWC Helios
OWC Mercury Helios
Thunderbolt PCIe
expansion chassis
Dell PowerEdge R620
NOT COMPATIBLE
Dell PowerEdge R620
HP DL 380 G7
NOT COMPATIBLE
HP DL 380 G7
* Not compatible with port-multiplier enclosures. The eSATA ports do not support hot-swapping. Accelsior E2 eSATA ports are bootable.
**A sleep conflict may be encountered when using certain eSATA chipsets via the eSATA ports when booted to the Accelsior E2. See the specifications tab for affected solutions where System Sleep mode MUST be disabled in order to ensure reliable operation. Allowing system sleep to occur while one of the affected external drives is connected via the Accelsior E2 eSATA ports could result in loss of data following wake from sleep. Although the above are our general recommendations for use, wake from sleep has been determined to only be an issue when the Accelsior PCIe is used for startup (SSD or eSATA connected device). We are working with our partners to see that the sleep/wake function is fully supported with all solutions and startup scenarios.
Mercury Accelsior and Mercury Helios are trademarks of New Concepts Development Corporation, registered in the U.S. Patent and Trademark Office. Apple, Mac, Mac Pro, OS X, and Xserve are trademarks of Apple Inc., registered in the U.S. and other countries. Thunderbolt is a trademark of Intel Corporation in the U.S. and/or other countries. Other marks may be the trademark or registered trademark property of their owners.