Vszerda
Vszerda SF22 2-Port SFF-8643 to PCIe 3.0 x4 Adapter Card
Converts a PCIe 3.0 x4 slot into two SFF-8643 ports using an ASM 2812 controller for bifurcation-free U.2 SSD support
- Typepci_express_x4
- ColorWith PCIe Bifurcation
- Length2-port
- Speedpci_express_x4
- Specifications2-port, pci_express_x4, GLOTRENDS
- Featurespci_express_x4, 2-port
- Converts one PCIe 3.0 x4 slot into two SFF-8643 ports
- Enables connection of U.2 SSDs using separate SFF-8643 to SFF-8639 cables
- ASM 2812 controller provides PCIe bifurcation without motherboard support
- Two ports share the upstream PCIe 3.0 x4 bandwidth allocation
- Works with Windows 10, 11, Linux and macOS without driver installation
Two SFF-8643 ports from one PCIe 3.0 x4 slot
The Vszerda SF22 adapter adds two SFF-8643 connectors to a desktop or server through a single PCIe 3.0 x4 slot. It uses an ASM 2812 controller that handles PCIe bifurcation internally, so the host board does not need native bifurcation support. The card fits standard and low-profile brackets and works with Windows 10, 11, Linux and macOS without extra drivers.
Bandwidth shared between both ports
The upstream link runs at PCIe 3.0 x4 speed and is also compatible with PCIe 2.0 and 1.0 slots. Both SFF-8643 ports share that single x4 bandwidth, so simultaneous heavy traffic on the two attached drives will contend for the same four lanes. The adapter itself does not multiply the available throughput beyond the slot's limit.
Check slot width and cable needs
Verify the system has a free PCIe x4 or wider slot and that the operating system is among the supported versions. A separate SFF-8643 to SFF-8639 cable is required for each U.2 SSD you plan to connect, and the drives themselves must be compatible with the SAS interface used by the SFF-8643 ports.
Highlights
- Converts one PCIe 3.0 x4 slot into two SFF-8643 ports
- Enables connection of U.2 SSDs using separate SFF-8643 to SFF-8639 cables
- ASM 2812 controller provides PCIe bifurcation without motherboard support
- Two ports share the upstream PCIe 3.0 x4 bandwidth allocation
- Works with Windows 10, 11, Linux and macOS without driver installation
Specifications
| Brand | GLOTRENDS, glotrends |
|---|---|
| Type | pci_express_x4 |
| Color | With PCIe Bifurcation |
| Length | 2-port |
| Speed | pci_express_x4 |
| Specifications | 2-port, pci_express_x4, GLOTRENDS |
| Features | pci_express_x4, 2-port |
Questions about this item
How do I decide between the regular bracket and the low-profile bracket included with this adapter?
The card ships with both a standard-height bracket and a low-profile bracket so you can fit it into either a full-size chassis or a slim 1U server without buying extra hardware.
What real-world throughput will I see from the PCIe 3.0 x4 link when two U.2 drives are connected?
Both SFF-8643 ports share the single PCIe 3.0 x4 upstream connection, so the combined bandwidth of the two drives cannot exceed that x4 limit.
Does the on-board ASM 2812 controller handle PCIe bifurcation so my motherboard does not need to support it?
Yes, the ASM 2812 manages bifurcation on the card itself, letting you split the x4 slot into two x2 links even if the platform lacks native bifurcation support.
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