Thank you for purchasing through links and ads on this site.
diglloyd Deal Finder...
Buy other stuff at
Upgrade the memory of your 2019 iMac up to 128GB
Handpicked deals...
$390 $270
SAVE $120

$1798 $1598
SAVE $200

$3297 $2797
SAVE $500

$3397 $2797
SAVE $600

$150 $90
SAVE $60

$1398 $898
SAVE $500

$3698 $2998
SAVE $700

$2998 $2498
SAVE $500

$1799 $1299
SAVE $500

$1999 $1199
SAVE $800

$2299 $1599
SAVE $700

$2399 $2049
SAVE $350

$2799 $2399
SAVE $400

$2799 $1899
SAVE $900

$1199 $920
SAVE $279

$1349 $1049
SAVE $300

$997 $897
SAVE $100

$2099 $1699
SAVE $400

$1999 $1349
SAVE $650

$1999 $1599
SAVE $400

$1999 $1999

$1329 $929
SAVE $400

$4499 $3999
SAVE $500

$329 $329

$1499 $999
SAVE $500

$1499 $1289
SAVE $210

$2199 $1999
SAVE $200

$3399 $2199
SAVE $1200

Mercury Accelsior 'E2' eSATA 6G Speed with HDD / SSD

See the other pages of this OWC Mercury Accelsior PCIe SSD review.

The OWC Mercury Accelsior E2 sports dual eSATA ports, a boon for anyone looking to have both eSATA connectivity and a PCIe SSD; on a 2008-2012 Mac Pro this saves a precious PCIe slot (there are only three open slots).

Fast external SSDs using 6G SATA ports

The eSATA 6G ports on the Accelsior E2 allow connecting any two eSATA devices.

  • External SSDs or hard drives can be connected (two SSDs, two hard drives or one of each).
  • External SSDs on the Accelsior E2 SATA 6 Gbps ports run much faster than the internal 2009-2012 Mac Pro SATA ports ( internal ports are 3 Gbps, Accelsior E2 eSATA ports are 6 Gbps).

Accelsior E2: eSATA speed to external Mercury Extreme Pro 6G SSD

An OWC Mercury Extreme Pro 6G SSD (480GB) was installed in an OWC Mercury Elite Pro Mini USB3/eSATA case (eSATA was used of course). This case is pass-through for eSATA (not a bridge board), so it should run the SSD at full speed.

External SSD performance using the Accelsior E2 eSATA ports is outstanding, reaching speeds approaching the limit of the SSD itself.

Context, the same 6G SSD on an internal Mac Pro SATA port will run at no more than 275 MB/sec (typical) versus the 450-470 MB/sec externally as here, a speed boost of about 67%.

The external solution: install the SATA SSD into the OWC Mercury Elite Pro Mini USB3/eSATA case. In so doing, one gets the best of both worlds: much higher speed than the internal ports, but also the capability to use the same drive on another Mac, including one with USB3.

The write speed downward spike at end is normal for all drives as the file system approaches capacity, reads are unaffected.

Click for a larger graph.

OWC Mercury Accelsior E2 PCIe eSATA using external 6G SSD

Accelsior E2: eSATA vs internal SATA hard drive performance

The same Seagate 3TB hard drive was used; it is a very fast hard drive, but has somewhat spiky read performance on both the internal Mac Pro port (green lines) and the eSATA port (blue lines), though it was a little more variable via eSATA.

eSATA write performance (orange) was identical to Mac Pro internal SATA port write speed (red).

Click for a larger graph.

OWC Mercury Accelsior E2 PCIe eSATA versus Mac Pro internal SATA performance with Seagate 3TB hard drive
Apple 13-inch MacBook Pro
Only $1799 $1149

8GB / 256GB SSD / 2.3 Ghz Intel Core i5

Apple Refurbished Factory Sealed
Apple 1 Year Limited Warranty
Awesome for a student!
Apple iMac 5K Speed Demon

It rocks! What Lloyd uses every day, best upgrade in many years!

• Add 128GB or 64GB memory
fast SSD storage
Thunderbolt storage

√ B&H Photo PAYS THE SALES TAX FOR YOU More info...
View all handpicked deals...

Samsung 2TB T5 Portable Solid-State Drive (Black)
$390 $270
SAVE $120 | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__