PEXUSB321C Specifications
StarTech 1‑Port USB 3.2 Gen 2×2 PCIe USB‑C Expansion Card
Manufacturer: StarTech
Manufacturer Model: PEXUSB321C
Product Line: StarTech PCIe USB Expansion Cards
Product Series: USB 3.2 Gen 2×2 (20 Gbps)
Product Type: Internal PCIe USB Adapter Card
Product Name: StarTech 1‑Port USB‑C PCIe USB 3.2 Gen 2×2 Card
KEY FEATURES:
PCIe Interface: PCI Express 3.0 x4 (backward compatible with PCIe 2.0)
USB Port: 1 × USB‑C SuperSpeed USB 3.2 Gen 2×2 (20 Gbps)
Chipset: ASMedia ASM3242
UASP (USB Attached SCSI Protocol) Support: Yes
Power Output: Up to 15 W (5 V @ 3 A) for device charging/syncing
Backward Compatibility: USB 3.2 Gen 2 (10 Gbps), USB 3.2 Gen 1 (5 Gbps), USB 2.0
Installation Brackets: Full‑profile and low‑profile included
Operating System Support: Windows, Linux, macOS
Warranty: 2‑year limited warranty with technical support
Notes: Does not support DisplayPort Alt Mode or video over USB‑C
PERFORMANCE:
Maximum Data Transfer Rate: 20 Gbps (USB 3.2 Gen 2×2)
Supports high‑performance storage devices (e.g., external SSDs) and other USB‑C peripherals
UASP support improves performance with compatible storage devices
ENVIRONMENTAL & RELIABILITY:
MTBF (Mean Time Between Failures): ~3,126,000 hours
Operating Temperature: ~0 °C to 85 °C
Storage Temperature: ~‑25 °C to 85 °C
Operating Humidity: ~15 % to 90 % RH
Designed for desktop PCIe expansion use with high‑speed USB devices
PHYSICAL:
Form Factor: Internal PCIe expansion card (low profile)
Slot Required: PCI Express x4 (or higher)
Typical Dimensions (approx): 80 mm × 51 mm × 22 mm
Weight: ~37 g
Color: Red PCB with metal bracket
Includes: Expansion card, full/low‑profile brackets, installation guide

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