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NewerTech MAXPower USB/eSATA 2x2 Host Adapter. Add two USB 3 ports & two eSATA 6Gb/s ports. Plug & Play with any Mac Pro or via Thunderbolt Chassis. Mac OS X v10.8.3, Windows 7, Windows 8 or later required. 3 Year NewerTech Limited Warranty. (MXPCIE2E2U3)

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MAXPower USB/eSATA 2x2 Host Adapter for Macs and PCs

Mac / PC / USB 3.0 / eSATA
Maximum Versatility
Designed specifically for OS X 10.8.3 and later, the MAXPower USB/eSATA 2x2 Host Adapter for Macs and PCs utilizes your computers built in xHCI drivers and is the perfect companion card for systems with Apple's current OS. For systems which are running 10.8.2 or earlier, a MAXPower USB/eSATA 2x2 Host Adapter with custom driver is also available.
Maximum Integration
The power of USB 3.0 and SATA 6G high-speed interfaces are brought together on a single PCIe 2.0 card with the MAXPower USB/eSATA 2x2 host adapter. With both high-speed USB 3.0 and 6Gb/s eSATA connectivity, the MAXPower USB/eSATA host adapter provides connections to the latest technology. This highly integrated I/O card saves valuable PCIe slots while adding the throughput desired for demanding applications like video editing, audio mixing, and photography.
Maximum Performance
The MAXPower USB/eSATA 2x2 host adapter provides two eSATA ports that are compatible with the latest 6G technology such as SSDs, allowing for speeds up to 6Gb/s. It is fully compatible with SATA I (1.5G), SATA II (3G) and USB 2.0 and supports legacy devices, hubs, and external optical drives. Simple to integrate and operate, it requires no drivers and supports hot-plugging, eliminating the need to restart the computer when connecting or disconnecting a USB or SATA device.
Maximum Power
The MAXPower USB/eSATA 2x2 Host Adapter maximizes the performance potential of USB 3.0 and 6Gb/s SATA storage devices. The revolutionary, dedicated per-port performance architecture allows each device to run flat out without interference from other attached devices. Each of the two USB 3.0 ports can utilize the UAS (USB Attached SCSI) protocol to transfer data to and from USB storage devices such as hard drives, solid state drives (SSDs) and thumb/flash drives. Faster transfer speeds and lower CPU utilization can be achieved than with the slower queue system of BOT (Bulk Only Transport), which only provides single-task commands - each task must complete before the next begins.

For applications in servers or other specialized computers where space is limited, the MAXPower USB/eSATA 2x2 features a removable bracket design to fit into low profiles machines. The small size accommodates most Mac and PC workstations. Using less power than most PCIe cards, the MAXPower has been designed to run faster and cooler than other cards on the market.

All MAXPower products are designed with superior quality components for long life reliability and the USB/eSATA 2x2 card is no exception. Every component from the card to the cables has been tested to ensure optimum performance.

Important Note: Apple OS X Sleep not recommended with this card. Sleep should be disabled when using devices with this card as you may otherwise experience volume ejections when waking from sleep. This issue is not present under Windows. NewerTech has reported a potential xHCI bug to Apple regarding sleep and we hope that Sleep support will exist in the future.


  • PCI Express 2.0 x4
  • Two USB 3.0 ports with Type A connectors (female)
  • Two 6Gb/s eSATA Ports
  • 20Gb/s transfer bandwidth
  • Dedicated per-port performance architecture
  • Optimized for all USB 3.0 & eSATA 6G/s storage devices
  • Thunderbolt compatible
  • Backwards compatible with USB 2.0 & 1.1, and eSATA 3Gb/s
  • eSATA Hot-Swap and Hot-Plug
  • Compliant with xHCI (Extensible Host Controller Interface) Specification v1.00 Thunderbolt™ Technology Enabled

Product Specifications

NewerTech Part Number


Hardware Requirements

  • Intel-based Mac with available PCI Express 2.0 x4 lane slot
  • Backwards comaptible with PCI Express 1.0a at reduced speeds*

Form Factor

  • Full-height, half-length

Operating System Support

Data Transfer Rate

  • USB 3.0: up to 500MB/s per port
  • eSATA: up to 500MB/s per port
  • Up to 20Gb/s total card bandwidth.
    Dedicated per port performance architecture fully utilizes the PCIe 2.0 x4 bandwidth


  • Via USB 3.0: No
  • Via eSATA: No

Port Multiplication

  • Via USB 3.0: No
  • Via eSATA: No

External Connectivity

  • x2 USB 3.0 Type A ports
  • x2 eSATA 6Gb/s ports

Internal Connectivity

  • none

SuperSpeed USB 3.0

  • Supports all USB communication speed data rate of Low-speed (1.5 Mbps) / Full-speed (12 Mbps) / High-speed (480 Mbps) / SuperSpeed (5Gbps)
  • Supports all USB compliant data transfer type as follows; Control / Bulk / Interrupt
  • Compliant with Intel's USB3.0 Host Controller Interface (xHCI) Specification revision 1.00
  • UAS (USB Attached SCSI) enabled for multiple simultaneous data transfer requests
  • Compatible with both USB 3.0 & USB 2.0 hubs

SATA 6Gb/s

  • Compliant with Serial ATA Specification 3.0
  • Supports all SATA communication speed data rate of 6.0 Gb/s, 3.0 Gb/s, 1.5 Gb/s
  • Supports AHCI 1.0
  • Supports Native Command Queuing (NCQ)

Hot Swappable

  • Yes

Hot Plugable

  • Yes

Thunderbolt™ Support


  • In Mac OS X, you may experience disk ejections when waking from sleep. It is a known issue for add on PCIe cards used with Mac OS X. This issue is not present with Windows 7 or 8 operating systems. It is suggested that you manually eject USB 3.0 devices prior to putting your Mac to sleep.
  • eSATA ports do not support port multiplication

Agency Approvals & Compliance

  • FCC Rules, Part 15, Class B
  • WEEE
  • CE
  • European Standard EN55022 (1998) Class B
  • European Standard EN55024 (1998)
  • RoHS Compliant


  • 4.72" x 4.53" x 0.75" (12.0 x 11.5 x 1.9 cm)


  • 0.43 lbs (0.19kg)

Operating Temperature

  • 0°C ~ 70°C (32°F ~ 158°F)

Non-Operating Temperature

  • -65°C~ 150°C (-85°F ~ 302°F)

Relative Humidity

  • 0% ~ 80% non condensing


*Use of a PCIe 1.0 slot would reduce bandwidth to 1000MB/s (250MB/s per port)
**Enclosures using Oxford chipsets do not work over eSATA in Windows 8. No issues with USB 3.0.
Manufacturer provided specifications for Newer Technology p/n MXPCIE2E2U3 UPC#: 816643013488
This Controller Card is compatible with... Learn how to find your Mac's model ID
Mac Pro
Mac Pro (Early 2008)
(January, 2008)
Model ID: MacPro3,1
2.8GHz, 3.0GHz, 3.2GHz
Mac Pro
Mac Pro (Early 2009 Quad-Core)
(March, 2009)
Model ID: MacPro4,1
2.66GHz, 2.93GHz, 3.33GHz
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
Mac Pro
Mac Pro 8-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
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
Xserve Intel
Xserve Quad-Core (Early 2009)
(April, 2009)
Model ID: Xserve3,1
Xserve Intel
Xserve 8-Core (Early 2009)
(April, 2009)
Model ID: Xserve3,1
2.26GHz, 2.66GHz, 2.93GHz
OWC Helios
OWC Mercury Helios
Thunderbolt PCIe
expansion chassis
PC Desktop
PC Desktops
PCs compatible with the specifications listed.
NewerTech MAXPower USB/eSATA 2x2 Host Adapter for Mac and PC's Mfr P/N: MXPCIE2E2U3 OWC SKU: NWTMXPCIE2E2U3 3 Year NewerTech Product Limited Warranty Ships: Same Day only $119.00 Add to CartNewer Technology MXPCIE2E2U3 In Stock, Click to Buy Now