Server and storage cabling that enables dual U.2 NVMe expansion while saving internal space. Space-saving routing and PCIe 4.0 throughput give system builders confidence, and the Allowish PCI-E Slimline Cable suits dense, enterprise environments. Does it deliver the reliability and performance engineers need?
⚡ At a Glance
- • Expansion Capability: Dual U.2 ports supporting NVMe over PCIe 4.0, designed for compact racks
- • Best for: System builders, data-centre engineers and cloud operators needing dense NVMe expansion
- • Not ideal for: Casual desktop upgraders without U.2 drives or simple SATA-only setups
Supports dual U.2 NVMe expansion over a slimline SFF-8654 host connector. Integrated 15-pin power and shielded terminals help preserve signal integrity and reduce EMI.
Space-saving installation - thanks to ultra-thin SFF-8654 slimline connectors
Ultra-thin interfaces and flexible cabling adapt to space-constrained servers, storage arrays and industrial equipment, allowing closer routing along chassis interiors. Slimline SFF-8654 mounting reduces obstruction of adjacent components and drive bays.
Frees internal space for additional drives or cooling clearance, making high-density NVMe builds easier to organise and maintain.
High-throughput NVMe performance - with PCIe 4.0 dual U.2 expansion
Supports the PCIe 4.0 protocol with a single-channel transfer rate up to 16 GT/s, letting NVMe SSDs operate near their native bandwidth. Direct SFF-8639 U.2 connections avoid adapter bottlenecks.
Delivers low-latency, high-bandwidth storage suitable for databases, caching layers and I/O-heavy workloads in enterprise environments.
Stable power and signal integrity - with integrated 15-pin dual-voltage power and shielding
A 15-pin connector supplies dual 12V and 3.3V inputs for U.2 devices while shielded cables and high-precision terminals minimise electromagnetic interference and maintain consistent signalling.
Ensures reliable operation during sustained transfers and supports hot-swap behaviour expected in data-centre deployments.
✨ The 4 Key Reasons for Allowish PCI-E Slimline Cable
- PCIe 4.0 support - Enables NVMe throughput up to 16 GT/s per channel for peak performance
- Slimline SFF-8654 host connector - Saves internal chassis space and eases cable routing
- Integrated 15-pin power - Supplies dual 12V/3.3V lines for direct U.2 drive power and stability
- Industrial temperature range - Rated for -40°C to +85°C, suitable for rugged and edge deployments
📋 Technical Details at a Glance
- Category: Server/storage expansion cable
- Connector (Host): SFF-8654 (8I 74P)
- Connector (Drives): 2× SFF-8639 U.2
- Power Connector: 15-pin (dual 12V/3.3V inputs)
- Protocol: PCIe 4.0
❓ Frequently Asked Questions
Q: What connectors does the cable use?
A: SFF-8654 (8I 74P) on the host side to two SFF-8639 U.2 connectors for drives, plus a 15-pin power interface.
Q: Does the cable support PCIe 4.0 speeds for NVMe SSDs?
A: Yes, PCIe 4.0 is supported with a single-channel transfer rate up to 16 GT/s to maximise NVMe performance.
Q: Is the cable suitable for hot-swap and rugged environments?
A: Yes, hot-swap is supported and the cable is rated for an industrial temperature range of -40°C to +85°C.
🏆 Our Verdict
Ideal for system builders and data-centre engineers who need compact, high-throughput NVMe expansion. Dual U.2 PCIe 4.0 connectivity with integrated power and shielding preserves performance and reliability in dense installations. While cost may be a consideration, long-term compatibility and rugged design make it a sensible infrastructure investment.
