PCI Express 4.0 X16 Graphics Card Extension Riser Kit Dual SlimSAS SFF-8654 Bifurcation Adapter for Desktop PC

Product DescriptionProduct NamePCIe 4.0 x16 to Dual SFF-8654 8i 1-to-2 Expansion KitProduct OverviewThis is a complete PCIe 4.0 x16 to dual SFF-8654 8i expansion kit. The kit includes 1 PCIe x16 host adapter card, 2 SFF-8654 to PCIe x16 base boards, and 2 SlimSAS SFF-8654 8i 75cm cables.It is designed to extend one motherboard PCIe x16 slot to two PCIe x16 base boards through SFF-8654 high-speed cables. It is suitable for GPU, network card, U.2 SSD adapter, NVMe expansion card, capture card, RAID card, and other PCIe devices.This kit is suitable for servers, workstations, open-frame PC builds, GPU testing platforms, industrial computers, and custom PCIe expansion systems.Important: If you want to use two PCIe devices at the same time, your motherboard, CPU, and BIOS must support PCIe bifurcation, such as x8+x8 mode. Please confirm compatibility before purchase. Key Features1. Complete 1-to-2 Expansion SolutionThe full kit includes the adapter card, two base boards, and two SlimSAS cables. It provides the required hardware for PCIe x16 to dual PCIe x16 expansion.2. PCIe Gen4 High-Speed DesignDesigned for PCIe 4.0 high-speed signal transmission and backward compatible with PCIe 3.0. Actual speed depends on your system configuration.3. Dual SFF-8654 8i ConnectionThe host adapter card provides dual SFF-8654 8i ports. Each port connects to a PCIe x16 base board through one SlimSAS 75cm cable.4. Supports x16 / x8+x8 / x4+x4+x4+x4 ModeThe kit can be used for PCIe lane split applications, but the actual mode depends on motherboard, CPU, and BIOS support. For two-device mode, x8+x8 bifurcation support is usually required.5. Wide PCIe Device SupportSuitable for graphics cards, network cards, capture cards, U.2 SSD adapters, NVMe adapters, RAID cards, and other PCIe add-on cards.6. Flexible InstallationThe 75cm SlimSAS cables allow more flexible device placement and better internal layout for server chassis, test benches, workstations, and open-frame cases. SpecificationsProduct Type: PCIe 4.0 x16 to Dual SFF-8654 8i Expansion KitHost Interface: PCIe x16Downstream Interface: 2 x SFF-8654 8iBase Board Slot: PCIe x16Cable Type: SlimSAS SFF-8654 8i CableCable Length: 75cmAdapter Card Size: 148 x 70mmBase Board Size: 145 x 37mmSupported Standard: PCIe Gen4, backward compatible with PCIe Gen3Supported Lane Mode: x16 / x8+x8 / x4+x4+x4+x4, depending on motherboard supportSupported Devices: GPU, Network Card, Capture Card, U.2 SSD Adapter, NVMe Adapter, RAID CardApplication: Server, Workstation, Open-Frame PC, GPU Test Bench, PCIe Expansion System How It WorksMotherboard PCIe x16 Slot→ PCIe x16 Host Adapter Card→ 2 x SlimSAS SFF-8654 8i Cables→ 2 x PCIe x16 Base Boards→ PCIe DevicesFor one device, the system may work in x16 mode depending on your connection and BIOS setting.For two devices, the motherboard usually needs to support x8+x8 PCIe bifurcation mode. Important Notes Before Purchase This product is not a simple plug-and-play GPU riser cable. It is a PCIe expansion and bifurcation kit. If you want to use two PCIe devices at the same time, your motherboard, CPU, and BIOS must support PCIe bifurcation. Common supported BIOS modes may include x8+x8 or x4+x4+x4+x4. If your motherboard does not support PCIe bifurcation, only one device may be recognized, or the system may not recognize multiple devices correctly. Actual speed depends on the lowest standard among motherboard, CPU, PCIe slot, BIOS settings, adapter card, cable, base board, and connected PCIe device. If one part of the system only supports PCIe 3.0, the whole connection may run at PCIe 3.0 speed. Graphics cards still need their own external power cable if required. This kit does not replace GPU power cables. Please do not hot-plug PCIe devices. Always turn off the computer before connecting or removing the adapter, cables, or devices. Please make sure the SlimSAS cable is fully inserted into the SFF-8654 connector. Some motherboards require BIOS updates or manual lane configuration before PCIe bifurcation can work. Compatibility may vary depending on motherboard model, CPU PCIe lanes, chipset, BIOS version, operating system, and device driver. Please confirm the package contents before purchase. If you only buy a cable, adapter card, or base board separately, it cannot complete the full 1-to-2 expansion by itself. Buyer Compatibility ChecklistBefore ordering, please confirm:Your motherboard has a PCIe x16 slot.Your motherboard supports PCIe bifurcation if using two devices.Your CPU provides enough PCIe lanes.Your BIOS supports x8+x8 or x4+x4+x4+x4 mode.Your PCIe device supports riser / extension connection.Your power supply can power the connected device.You selected the correct product option or full kit. FAQQ1: Can this kit connect two graphics cards?Yes, but your motherboard, CPU, and BIOS must support PCIe bifurcation such as x8+x8 mode.Q2: Why does my computer only recognize one device?Usually because the motherboard does not support PCIe bifurcation or the BIOS lane mode is not set correctly.Q3: Does this kit support PCIe 4.0?It is designed for PCIe Gen4 applications and is backward compatible with PCIe Gen3. Actual speed depends on your hardware.Q4: Can I use PCIe 3.0 devices?Yes. If your motherboard or device only supports PCIe 3.0, the system will work at PCIe 3.0 speed.Q5: Can I use it for U.2 SSD or NVMe expansion?Yes, if your adapter and motherboard support the required PCIe lane mode.Q6: Is this the same as a normal GPU riser cable?No. This is a PCIe x16 to SFF-8654 expansion kit for advanced PCIe extension and bifurcation applications.Q7: Does the kit power the GPU?No. If your GPU needs external 6-pin, 8-pin, or other power connectors, you must connect power from the PSU.Q8: Can I hot-plug the cable?No. Please power off the system before installation or removal.