PCI-E Slimline SAS SFF-8654 8i to Dual SFF-8611 4i Server Cable 74Pin Connector 24Gbps Compatible

🔌 Overview

• Connector A: SFF-8654 8i (74-pin SlimSAS)

• Connector B: 2 x SFF-8611 4i (38-pin OCuLink)

• Cable Type: Internal forward breakout cable

• Typical Lengths: 0.5m, 0.75m, 1.0m

📐 Technical Specifications

• Supported Protocols:

• PCIe Gen3 / Gen4 (up to 16 GT/s per lane)

• SAS-3 (12 Gbps) and SAS-4 (24 Gbps)

• NVMe over PCIe, depending on system configuration

• Lane Configuration:

• SFF-8654 8i carries 8 lanes total

• Split to two SFF-8611 4i connectors (4 lanes each)

• Impedance: 85 Ohms differential (optimized for PCIe/SAS signal integrity)

• Wire Gauge: Typically 32 AWG (high-flex, low-loss for short distances)

• Shielding:

• Individually shielded twisted pairs for each differential lane

• Overall foil and braided shielding to minimize EMI

• Compliance:

• Conforms to SFF-8654, SFF-8611, and SFF-9402 internal cabling standards

• UL-certified for internal high-speed signaling

⚙️ Use Case

• Connects a PCIe/SAS host device (like a RAID controller or motherboard with SFF-8654)

→ to two endpoints (like NVMe U.2/U.3 drives or backplanes with SFF-8611 ports)

• Common Applications:

• Server backplanes

• Storage enclosures

• Enterprise RAID/NVMe configurations

• High-performance computing systems