The PEXUSB3S24 2-Port PCI Express USB 3.0 Card lets you add two USB 3.0 ports to your PCI Express-enabled computer system, with an optional SATA power connector to connect to your system power supply and deliver up to 900mA of power per port to USB 3.0 bus-powered devices (500mA for USB 2.0). Enhanced with UASP support (USB Attached SCSI Protocol), this USB 3.0 controller performs up to 70% faster than conventional USB 3.0 when paired with a External Drive Enclosures. Using a more efficient protocol than the traditional USB BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. The PCIe USB 3.0 adapter is compliant with USB 3.0 standards for data transfer speeds up to 5 Gbps, while still offering backward compatibility with existing USB 2.0 / 1.1 devices. For added versatility, the controller card is equipped with a standard profile bracket and includes a low-profile/half-height bracket for installation in small form-factor computers.
The PEXUSB3S24 2-Port PCI Express USB 3.0 Card lets you add two USB 3.0 ports to your PCI Express-enabled computer system, with an optional SATA power connector to connect to your system power supply and deliver up to 900mA of power per port to USB 3.0 bus-powered devices (500mA for USB 2.0). Enhanced with UASP support (USB Attached SCSI Protocol), this USB 3.0 controller performs up to 70% faster than conventional USB 3.0 when paired with a External Drive Enclosures. Using a more efficient protocol than the traditional USB BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. The PCIe USB 3.0 adapter is compliant with USB 3.0 standards for data transfer speeds up to 5 Gbps, while still offering backward compatibility with existing USB 2.0 / 1.1 devices. For added versatility, the controller card is equipped with a standard profile bracket and includes a low-profile/half-height bracket for installation in small form-factor computers.
The PEXUSB3S24 2-Port PCI Express USB 3.0 Card lets you add two USB 3.0 ports to your PCI Express-enabled computer system, with an optional SATA power connector to connect to your system power supply and deliver up to 900mA of power per port to USB 3.0 bus-powered devices (500mA for USB 2.0). Enhanced with UASP support (USB Attached SCSI Protocol), this USB 3.0 controller performs up to 70% faster than conventional USB 3.0 when paired with a External Drive Enclosures. Using a more efficient protocol than the traditional USB BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. The PCIe USB 3.0 adapter is compliant with USB 3.0 standards for data transfer speeds up to 5 Gbps, while still offering backward compatibility with existing USB 2.0 / 1.1 devices. For added versatility, the controller card is equipped with a standard profile bracket and includes a low-profile/half-height bracket for installation in small form-factor computers.
The PEXUSB3S24 2-Port PCI Express USB 3.0 Card lets you add two USB 3.0 ports to your PCI Express-enabled computer system, with an optional SATA power connector to connect to your system power supply and deliver up to 900mA of power per port to USB 3.0 bus-powered devices (500mA for USB 2.0). Enhanced with UASP support (USB Attached SCSI Protocol), this USB 3.0 controller performs up to 70% faster than conventional USB 3.0 when paired with a External Drive Enclosures. Using a more efficient protocol than the traditional USB BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. The PCIe USB 3.0 adapter is compliant with USB 3.0 standards for data transfer speeds up to 5 Gbps, while still offering backward compatibility with existing USB 2.0 / 1.1 devices. For added versatility, the controller card is equipped with a standard profile bracket and includes a low-profile/half-height bracket for installation in small form-factor computers.
Last updated at 06/26/2026 23:47:59
StarTech.com 2 Port PCI Express SuperSpeed USB 3.0 Card Adapter with UASP - SATA PEXUSB3S24
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Startech 2 Port Pcie Usb 3.0 Card Adapter W/ Uasp Silver
Delivery $19.99
STARTECH 2 Port PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - SATA Power - Dual Port USB 3 PCIe Controller (PEXUSB3S24)
Delivery $25
[PEXUSB3S24] StarTech 2-Port PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - SATA Power
7-day returns
STARTECH 2 Port Pci Express Pcie Superspeed Usb PEXUSB3S24
Delivery between 1–6 July $18
StarTech 2 Port PCIe USB 3.0 Card Adapter w/ UASP - PEXUSB3S24
Delivery $12.99
2 Port PCI Express PCIe SuperSpeed (5Gbps) USB 3.0 Card Adapter with UASP - SATA Power - TAA
2 Port PCI Express PCIe SuperSpeed (5Gbps) USB 3.0 Card Adapter with UASP - SATA Power - TAA
2 Port PCI Express PCIe SuperSpeed (5Gbps) USB 3.0 Card Adapter with UASP - SATA Power - TAA
2 Port PCI Express PCIe SuperSpeed (5Gbps) USB 3.0 Card Adapter with UASP - SATA Power - TAA
originally posted on influenster.com
This card adapter is awesome. I hated not being able to use my SD card and when I bought this I felt good since It is a great product. It has been working for me for over a year so I'd say it's perfect. Really good quality
originally posted on pbtech.co.nz
"Dose exactly what it says on the tin"". No need to load driver from disk, Win 10 found it immediately and it worked straight away.
originally posted on pbtech.co.nz
It does what's advertised, easy to set up, and I'm two USB ports richer. Good purchase!
| General | |
| Device Type | USB adapter |
| Form Factor | Plug-in card |
| Interface (Bus) Type | PCI Express x1 |
| Networking |
StarTech.com 2 Port PCI Express SuperSpeed USB 3.0 Card Adapter with UASP - SATA PEXUSB3S24
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Startech 2 Port Pcie Usb 3.0 Card Adapter W/ Uasp Silver
Delivery $19.99
STARTECH 2 Port PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - SATA Power - Dual Port USB 3 PCIe Controller (PEXUSB3S24)
Delivery $25
[PEXUSB3S24] StarTech 2-Port PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - SATA Power
7-day returns
STARTECH 2 Port Pci Express Pcie Superspeed Usb PEXUSB3S24
Delivery between 1–6 July $18
This card adapter is awesome. I hated not being able to use my SD card and when I bought this I felt good since It is a great product. It has been working for me for over a year so I'd say it's perfect. Really good quality
"Dose exactly what it says on the tin"". No need to load driver from disk, Win 10 found it immediately and it worked straight away.
It does what's advertised, easy to set up, and I'm two USB ports richer. Good purchase!
Need extra USB ports? Might as well use this product. The USB 3.0 is so much faster than the old USB 2.0 ports. Just plug this in to your CPU tower PCI slot and you will not regret it.
Purchased this card to replace a previous card from the same manufacturer that was fried by electrostatic discharge (ESD) this past winter. Hot, dry air and nylon carpets are bad for computer electronics! Card installed quickly and easily and works just fine for low-power USB 3.0 devices such external HDD backups that have their own power supply as well as flash drives. This particular card runs off the power of the PCIe card slot, so it is best not/not to use it for applications that require a full power (900 ma) output from the USB port. If you need that additional power, then purchase the model that includes the additional SATA power connector that hooks up to your PC's power supply.
Works great. Would be nice it it came with a y-splitter, or at least an extension for the Sata power requirement.
Bought this to upgrade a Dell R720 Server so we could to backups to USB cradle for external backups. Loaded the drivers that came with it into Server 2019 and it worked like a charm. Way faster than USB 2.0 that is on the server. Cut backup to less than half the time.
Does everything it's supposed to do; no more, no less. Transfer speeds to an external SSD HD are about 95MB/s read and 71MB/s write.
I have installed 5 of these so far and each one has worked flawlessly. Load the drivers and install the card and it works. It is that simple!
The included instructions give the name of the setup file which needs to be run. And the CD has a lot of different drivers on it, so you have to tell Windows to search the CD for a particular filename. Running a firmware update found on StarTech's website was not necessary (it confirmed the latest drivers were already installed).
| General | |
| Device Type | USB adapter |
| Form Factor | Plug-in card |
| Interface (Bus) Type | PCI Express x1 |
| Networking |
