Model: PA20
Interface to PC | PCI-Express 3.0 X4 |
---|---|
Interface to SSD | 2 x Key M |
Max Bandwidth (GBbps) | ~4GBbps (PCIe 3.0 X4); ~2GBbps (PCIe 2.0 X4) |
Chip | ASM2812 |
Form Factor | 2230/2242/2260/2280/22110 |
OS Compatibility | Windows and Linux (Note: can not work with windows 7 and Mac Pro 5.1) |
PCIe Bifurcation | Support |

Dual M.2 NVMe SSD Host Adapter with PCIe Bifurcation Function
- Add 2 x M.2 NVMe SSD (M-Key) onto a single PCIe X4 host adapter, so you can access 2 x M.2 NVMe SSD at the same time
- Support soft RAID in Windows/Linux/3rd party software
- Support M.2 NVMe SSD RAID-on-CPU (VROC) in the Intel Platform, but you need to purchase an Intel VROC license by yourself
- Support M.2 NVMe RAID in AMD Platform
- Support Mac Pro 5.1
- PCIe 3.0 X4 bandwidth
- For PCIe 4.0 SSD, it will downgrade to PCIe 3.0 mode
- Support PCIe bifurcation function
- Support 2230/2242/2260/2280/22110 form factor
- The gap between the two NVMe slots is 3mm
- Regular profile bracket and low profile bracket

PCIe Bifurcation (PCIe Splitter)
- With ASM2821 PCIe Bifurcation function, PA20 can work with none PCIe Bifurcation motherboard;
- The disadvantage is that PA20 cannot support PCIe 4.0 and only support PCIe 3.0/2.0 features;
- The max bandwidth is PCIe 3.0 X4, which means 2 x M.2 NVMe SSD share PCIe 3.0 X4 bandwidth.

Soft RAID in Window 10
- When you find 2 separate M.2 NVMe SSD in Disk Management of Windows 10
- Right click the disk volume, which you want to setup soft RAID
- A pop-up window appears, click the option (Spanned/Striped/Mirrored)
- Noted: You can setup soft RAID in Linux/Mac/3rd party software also.

PCIE 3.0 X4 Full Speed
- Compatible with PCIe 3.0/2.0 motherboards, and install into PCI-Express X4 lane.
- To reach PCIe 3.0 speed, make sure your CPU and motherboard and PCIe SSDs are all PCIe 3.0 enabled.

M.2 SSDs Installation
- M.2 SSD head tilted at 30 degree angle, inserted into Key M interface
- The brass standoff snaps into the semi-circular position at the end of the M.2 SSD
- Secure the brass standoff from the back with screw

Packaging includes
- PA20
- 2 x M.2 Screw and Copper Stand
- 8cm Low-profile bracket
- Screws for bracket mounting to PC
- Screwdriver
Note: If the M.2 screw and standoff are pre-installed in position 22110, you can remove it and install it in position 2280.