Lekuo PCIe 4.0 x4 to U.2 Adapter | Amphenol Connector

Model

IO-PCE8639A-U2

Interface

PCI Express 4.0 x4

Bus Type

PCI Express 3.1/3.0/2.0/1.0 compatible

Data Transfer Rate

PCIe Gen4 x4 (up to 64Gbps theoretical)

U.2 Port

1 x U.2 (SFF-8639)

Supported Protocol

NVMe 1.2a

Supported Device

2.5"" U.2 NVMe SSD

Operating Temperature

-40°C to +85°C (Industrial Grade)

Driver

No driver required

System Boot Support

Depends on motherboard BIOS support

OS Compatibility

Windows 8/8.1/10/11 or later, Linux, UEFI 2.3.1+, VMware

Accessories Included

1 x PCIe x4 to 1-port U.2 SFF8639 2.5-inch SSD Adapter, 1 x User Manual

Features
• Support PCI Express Base Specification Rev4.0
• Backwards compatible with PCIE V3.1,3.0,2.0 and V1.0 mainboards
• PCI Express interface: x4
• Support SSD_Form_Factor_Version1_a.
• Compliant with NVM Express 1.2a
• Supports one physical NVMe devices
• Industrial operating temperature range:-40~85°C

System Requirement
• Windows 8,8.1,10 ,11or later
• UEFI 2.3.1 or later
• Linux
• VMware
• One available PCI-Express x4,x8 or x16 slot

Application
• Servers
• HBA(Host Bus Adapter)
• Data Center
• Storage Racks
• Storage Controller
• Routers

Package Content
• 1 x PCIe x4 to 1-port U.2 SFF8639 2.5-inch SSD Adapter
• 1 x User Manual
Note: Contents may vary depending on country/market

Related Downloads

1. IO-PCE8639A-U2

Download

Q: Why is Amphenol connector important?
A: Amphenol connectors use gold-plated contacts and precision alignment to ensure 7000MB/s stable performance and 10,000+ insertion cycles durability.
Generic connectors often cause intermittent disconnections and data corruption.

Q: What is the maximum speed?
A: PCIe 4.0 x4 theoretical bandwidth is 64 Gbps (8 GB/s).
Real-world tested speed with Samsung PM1733: 7109 MB/s read / 5182 MB/s write.

Q: Can I boot from U.2 SSD?
A: Yes, if your motherboard BIOS supports NVMe boot.
Check BIOS settings and enable NVMe boot option.

Q: Which U.2 SSDs are compatible?
A: All standard 2.5-inch U.2 NVMe SSDs with SFF-8639 connector, including Intel Optane, Samsung PM1733/PM1735, Micron 9300 series, Kioxia XD6, WD Ultrastar SN series.

Q: Does it require drivers?
A: No. Windows 8+ and modern Linux kernels support NVMe natively.
Plug-and-play.

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Lekuo PCIe 4.0 x4 to U.2 Adapter | Amphenol Connector | 7000MB/s