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Model: PU21

Interface to PC

PCI-Express 4.0 X8 (128GBbps at max)

Interface to SSD

2 x U.2

OS Compatibility

Windows and Linux (Note: not support windows 7)

PCIe Bifurcation

Not support, so it requires a motherboard that supports PCIe Bifurcation

Hardware Platform

Intel and AMD motherboard with PCIe Bifurcation (Note: not support Mac Pro)

CPU Requirements

Intel 11th Gen or Ryzen 5000 Series and above

RAID Setup

Software RAID setup via Windows Disk Management or Linux mdadm Utility

Installation

Regular-profile bracket
Dual U.2 to PCIe 4.0 X8
Dual U.2 to PCIe 4.0 X8
Dual U.2 to PCIe 4.0 X8
Dual U.2 to PCIe 4.0 X8
Dual U.2 to PCIe 4.0 X8
Dual U.2 to PCIe 4.0 X8
PCIe Bifurcation in ASUS BIOS

Enable Hyper M.2 <---> Advanced\Onboard Devices Configuration

Dual U.2 to PCIe 4.0 X8
PCIe Bifurcation in MSI or others BIOS

Configure PCIe x4+x4 or x4+x4x4+x4

Dual U.2 to PCIe 4.0 X8
RAID Setup in Window 10/11
Software RAID for U.2 SSD
  1. When you locate 2 separate U.2 SSDs in Windows 10/11 Disk Management
  2. Right-click the disk volume you want to set up as a soft RAID
  3. A pop-up window will appear; click the desired option (Spanned/Striped/Mirrored)
Products
PCIe 4.0 X4 Adapter PU11
PCIe 4.0 X4 Adapter PU13
PCIe 4.0 X4 Adapter PU21
PCIe 4.0 X4 Adapter PU41
PCIe 4.0 X4 Adapter PA21
PCIe 4.0 X4 Adapter PA41
Internal Interface PCI-Express 4.0 X4 PCI-Express 4.0 X4 PCI-Express 4.0 X8 PCI-Express 4.0 X16 PCI-Express 4.0 X8 PCI-Express 4.0 X16
External Interface U.2 U.3 2 x U.2 4 x U.2 2 x M.2 4 x M.2