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CalDigit FASTA-6GU3 Pro: 2 port USB 3.0 & 2 Port 6Gb/s eSATA host adapter

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This product is discontinued

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Product code: CDG-6GU3-PRO



for Mac Pro or Windows PC with PCI express slot. Adds two eSATA 6Gb/s ports and two USB 3.0 ports to Mac or PC (and two internal SATA 6Gb/s for PC only).
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2 Port 6Gb/s eSATA & 2 Port USB 3.0 PCIe Host Adapter

Mac / PC / PCIe / eSATA / SATA (PC Only) / USB 3.0
Maximize the Potential of 
Your Mac Pro or Desktop PC
The next evolution of USB 3.0 and eSATA interface cards
The FASTA-6GU3 Pro is the next evolution of CalDigit's popular USB 3.0 and eSATA interface card. This PCIe card has been revamped with the latest USB 3.0 protocols and SATA 6G chipsets to deliver increased performance.
Supports Multiple Simultaneous Data Transfer Requests
The FASTA-6GU3 Pro's USB 3.0 ports now support UASP (USB Attached SCSI Protocol), which dramatically improves the performance and efficiency of the USB 3.0 interface. When paired with a UASP-compatible device, such as the CalDigit AV Pro SSD, the FASTA-6GU3 Pro can deliver dramatically increased performance compared to other USB 3.0 PCIe cards using the traditional, less efficient BOT Protocol (Bulk Only Transfer). UASP improves upon BOT by allowing multiple command queuing, and the execution of out of order commands. It also improves the efficiency of USB 3.0 by freeing up system resources for more important tasks.
Two by Two...by Two.
Featuring two USB 3.0 ports and two eSATA ports, the FASTA-6GU3 Pro gives users the flexibility of dual interfaces while saving a precious PCIe slot. The FASTA-6GU3 Pro also has two internal SATA ports that allow PC users to connect up to two additional hard drives inside their workstation.
Space Saving
The FASTA-6GU3 Pro only takes up one of your workstation's PCIe slots by combining two interfaces into one card, saving you space for other PCIe cards.
This Card Adds:
  • Two external eSATA ports
  • Two external USB 3.0 ports
  • Two internal SATA ports (PC Only)
  • Available PCIe Slot

See specifications below for system and/or OS compatibility information

Product Specifications

CalDigit Part Number

  • FASTA-6GU3 Pro

Hardware Requirements

  • Mac or PC with available PCI Express 2.0 x4 lane or higher slot

Form Factor

  • Full-height, half-length

Operating System Support

  • Mac OS X 10.7 and later
  • Windows 7 and later

Data Transfer Rate

  • USB 3.0: up to 500MB/s per port
  • eSATA: up to 600MB/s per port
  • SATA: up to 600MB/s per port (PC Only)


  • Via USB 3.0: No
  • Via eSATA: Yes

Port Multiplication

  • Via USB 3.0: No
  • Via eSATA: Yes*
    * Only one eSATA port can support port multiplier at a time. Port multiplier capabilities will be assigned to the first device that is detected if two are connected.

External Connectivity

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

Internal Connectivity

  • x2 SATA 6Gb/s ports (PC only)

Thunderbolt™ Support

  • Yes, may be used in externalThunderbolt expansion chassis

SuperSpeed USB 3.0

  • Compliant with Extensible Host Controller Interface (xHCI) Specification Revision 1.0
  • 2 downstream USB ports support SS/HS/FS/LS data rates (5 Gbps/480 Mbps/12 Mbps/1.5 Mbps)
  • 1 Lane PCI Express 2.0 interface
  • Support UASP (USB Attached SCSI Protocol) under Microsoft Windows 8 & Mac 10.8.4 and above.
  • Compatible with both USB 3.0 & USB 2.0 hubs
    USB 3.0 hubs are compatible with the FASTA-6GU3 Pro when used in Macs with OS X 10.8.4 or later and Windows 7 or later. You are suggested to use the hub that is USB 3.0 compliance and also the latest stable firmware to the USB 3.0 hub. Please contact the hub manufacturer for more information about firmware update and compliance.

SATA 6Gb/s

  • 2 Lane PCI Express 2.0 interface
  • Compatible with all eSATA devices
  • Backwards compatible with older eSATA devices
  • Data transfer speeds up to 600 MB/sec
  • Supports AHCI 1.0 programming interface
  • Supports Mac OS X and Windows RAID features

Plug & Play

  • If you are using Mac OS X 10.8.4 or higher, no drivers are required. The card is plug & play.
    If your Mac OS X version is 10.7, you will need to download the driver.
  • If you are using Windows 8, no drivers are required. The card is plug & play. 
    If you are using Windows 7, you will need to download the driver.

Hot Swappable

  • Yes

Hot Plugable

  • Yes, Supports Hot Plugging under Windows 7 & Mac OS X with RAID 0/1/10 devices.

Sleep Note

  • 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.

Agency Approvals & Compliance

  • FCC Rules, Part 15, Class B
  • RoHS Compliant


  • 5.51" x 4.2" x 0.75" 
    (14.0 x 10.6 x 1.9 cm)


  • 0.47 lbs (0.21kg)

Operating Temperature

  • 0°C ~ 85°C (32°F ~ 185°F)

Non-Operating Temperature

  • -40°C~ 85°C (-40°F ~ 185°F)

Relative Humidity

  • 5% ~ 95% non condensing


  • 1 Year CalDigit Warranty

Manufacturer provided specifications for CalDigit p/n FASTA-6GU3 Pro UPC#: 4712010080656



This product is compatible with...Learn how to find your Mac's model ID


Mac Pro
Mac Pro 12-Core
(Mid 2010-2012)
(July, 2010)
Model ID: MacPro5,1
2.40GHz, 2.66GHz, 2.93GHz, 3.06GHz


Mac Pro
Mac Pro 8-Core
(Mid 2010-2012)
(July, 2010)
Model ID: MacPro5,1


Mac Pro
Mac Pro 6-Core
(Mid 2010-2012)
(July, 2010)
Model ID: MacPro5,1


Mac Pro
Mac Pro Quad-Core
(Mid 2010-2012)
(July, 2010)
Model ID: MacPro5,1
2.8GHz, 3.2GHz




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 2009 Quad-Core)
(March, 2009)
Model ID: MacPro4,1
2.66GHz, 2.93GHz, 3.33GHz


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




Mac Pro
Mac Pro
(August, 2006)
Model ID: MacPro1,1
2.0GHz, 2.66GHz, 3.0GHz


PC Desktop
PC running Windows, Linux or FreeBSD and available PCI-Express x4 lane or better slot


OWC Helios
OWC Mercury Helios
Thunderbolt PCIe
expansion chassis




Additional Information

Colour No
Type No
Connection eSATA, USB 2.0, USB 3.0
Interface PCI
Form Factor No
Suitable for No
Model Identifier No
Manufacturer CalDigit
Manufacturer P/N CDGFASTA6GU3PRP
Shipping Restriction N/A

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Macfixit Australia is an Australian owned and operated business based in Melbourne, Victoria and we've been operating since 2005.

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