Brand | GLOTRENDS |
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Manufacturer | glotrends |
Model | PA21 |
Part Number | PA21 |
OS | Linux, Windows, Mac OS (Not support Windows 7/Mac Pro 5.1) |
Hardware interface | PCIE x 8 |
Graphics Card Interface | PCI Express |
Compatible Devices | Personal Computer |
Number of Items | 1 |
Batteries included | No |
Batteries Required | No |
Does it contain liquid? | No |
Manufacturer | glotrends |
Item model number | PA21 |
Product Dimensions | 15 x 5.4 x 0.3 cm; 130 g |
ASIN | B09PGDMWKH |
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GLOTRENDS PA21 Dual M.2 NVMe to PCIe 4.0 X8 Adapter Without Bifurcation Function, Support 22110/2280/2260/2242/2230 Size (PCIe Bifurcation Motherboard is Required)
Purchase options and add-ons
Brand | GLOTRENDS |
Hardware interface | PCIE x 8 |
Style | Dual M.2 NVMe to PCIe 4.0 X8 Adapter Without PCIe Bifurcation Function |
Item weight | 0.13 Kilograms |
Compatible devices | Personal Computer |
Manufacturer | glotrends |
About this item
- Dual M.2 NVMe to PCIe 4.0 X8 Adapter: By installing 2 M.2 NVMe SSDs (Support 22110/2280/2260/2242/2230 M.2 NVMe SSD) on this PCIe 4.0 X8 adapter, your computer will be able to access 2 M.2 NVMe SSDs at the same time
- Hardware Platform: Support Soft RAID in Intel/AMD platform, not support Mac Pro 5.1 (Note: To set up Intel's RAID-on-CPU (VROC), you need to purchase your license)
- Set the PCIe Bifurcation mode of the corresponding PCIe slot in the BIOS, support X4X4X4X4 or X4X4X8 or Hyper M.2 X16 mode (Note: Can not support X8X4X4 mode)
- Important: Because this adapter does not support PCIe Bifurcation, it requires a motherboard that supports PCIe Bifurcation. Otherwise, only the NVMe-1 port can recognize the NVMe SSD. Before purchasing, please check the PCIe expansion slot part of the motherboard manual on the motherboard manufacturer's website, or consult us directly
- To reach PCIe 4.0 X4 (64Gbps) full speed, the CPU and motherboard PCIe slot and PCIe M.2 SSD should all be PCIe 4.0 features (Note: PCIe 4.0 is not supported on Intel CPUs below 11th generation)
- Support OS Booting: Reinstall the OS, and set up BIOS/UEFI boot from this M.2 NVMe SSD (Note: Some motherboards are too old to support OS booting. In this case, M.2 NVMe SSDs can be used as storage disks)
- OS compatibility: Plug-and-play in Windows 11/10/8/Linux/Mac OS (Note: Not support Windows 7). The new M.2 NVMe SSD needs to be initialized and formatted before it can be recognized by the computer host.
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Product information
Technical Details
Additional Information
Date First Available | Dec 30 2021 |
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Customer Reviews |
4.2 out of 5 stars |
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From the brand

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GLOTRENDS specializes in developing high-performance PCIe adapters and riser cables for computer engineers and DIY enthusiasts.
The products mainly include 2 series: PCIe adapters (M.2 SSD Adapter, SATA Card, WiFi/Ethernet Card, USB Card, etc) and PCIe 5.0/4.0/3.0 extension cables.
The goal of GLOTRENDS is to provide quality-assured and cost-effective products to customers worldwide. Customized production is welcome.
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Product Description
Model: PA21
Interface to PC | PCI-Express 4.0/3.0 X8 |
Interface to SSD | 2 x Key M/B+M (Note: some M.2 SATA SSDs are also Key B+M) |
Max Bandwidth (GBbps) | ~16GBbps (PCIe 4.0 X8); ~8GBbps (PCIe 3.0 X8) |
Chip | ASM1182E |
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 | Not support |

Dual M.2 PCIe SSD Host Adapter
- Add 2 x M.2 PCIe (NVMe/AHCI) SSD (M-Key) onto a single PCIe X8 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
- Not compatible with Mac Pro 5.1
- The gap between the two NVMe slot is 3mm

PCIE Bifurcation Setup in BIOS/UEFI
- Noted: This Dual M.2 PCIe SSD Host Adapter can not splitter PCIE X8 to PCIe X4X4, so your motherboard must support PCIE Bifurcation function. Otherwise, only one M.2 PCIe SSD will be recognized. If you are not sure PCIe Bifurcation of your motherboard, please provide the motherboard information, and we will reply within 24 hours.
- Setup PCIE splitter in BIOS/UEFI into X4X4X4X4 or X4X4 (Compatible with Hyper M.2 X16 mode in ASUS).
- Note: In mode X8X4X4, only one M.2 NVMe SSD will be recognized.

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.

PCI-Express X8 Full Speed
- Compatible with PCIe 4.0/3.0/2.0 motherboards, and install into PCI-Express X8 lane.
- To reach PCIe 4.0 speed, make sure your CPU and motherboard and PCIe SSDs are all PCIe 4.0 enabled.
- To reach PCIe X8 full bandwidth, setup 2 x M.2 PCIe SSD into RAID 0 mode.

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
- PA21
- 2 x M.2 screw and copper stand
- 8cm low-profile bracket
- Screws for bracket mounting to PC
- Screwdriver