1. Product Overview
The UGREEN CM302 M.2 NVMe to PCIe 3.0 Adapter allows you to integrate an M.2 PCIe (M-Key) Solid State Drive (SSD) into your desktop computer's available PCIe slot. This adapter is designed to enhance system speed and performance by utilizing high-speed NVMe SSDs.
It is compatible with various PCIe motherboard versions, including PCIe 3.0, PCIe 2.0, and PCIe 1.0. The adapter supports PCIe 3.0 x4 NVMe (M-Key) and PCIe AHCI M.2 SSDs of different form factors: 2230, 2242, 2260, and 2280.
The design incorporates multi-layer protection features against overcurrent, overvoltage, short-circuit, and electromagnetic interference, safeguarding your valuable M.2 NVMe SSD and data.
Image 1.1: The UGREEN CM302 adapter, showing compatibility with PCIe 3.0 X4, X8, and X16 slots, supporting PCIe 3.0/2.0/1.0.
Image 1.2: The adapter supports M.2 SSDs of sizes 2230, 2242, 2260, and 2280.
2. Safety Information
- Always power off your computer and disconnect it from the power source before installing or removing any internal components.
- Discharge any static electricity from your body by touching a grounded metal object (e.g., the computer chassis) before handling the adapter or SSD.
- Handle the adapter and SSD by their edges to avoid touching sensitive components.
- Ensure proper ventilation inside your computer case to prevent overheating.
- Do not attempt to modify or repair the adapter. Contact UGREEN support if issues arise.
3. Package Contents
Please verify that all items are present in your package:
- UGREEN M.2 NVMe to PCIe 3.0 Adapter Card
- Low-profile bracket (for small form factor cases)
- Mounting screws for SSD and bracket
- Screwdriver
- User Manual
Image 3.1: Contents of the UGREEN CM302 package, including the adapter, bracket, screws, screwdriver, and manual.
4. Specifications
| Feature | Specification |
|---|---|
| Model Number | CM302 (70503) |
| Compatible Devices | Personal Computer, Laptop (with available PCIe slot) |
| Connector Type | PCI-E 3.0 X4 |
| PCIe Compatibility | PCIe 3.0, PCIe 2.0, PCIe 1.0 |
| Supported SSD Type | M.2 NVMe (M-Key) PCIe 3.0 x4 SSD, PCIe AHCI M.2 SSD |
| Supported SSD Sizes | 2230, 2242, 2260, 2280 |
| Color | Black |
| Item Dimensions (L x W x H) | 13 x 13 x 3 cm |
| Finish Type | Matte |
| Number of Ports | 1 (for M.2 SSD) |
| Power Plug Type | No external power plug required |
| Operating System Support | Windows 10/8.x/7, Mac, Linux (drive-free for Windows/Linux) |
5. Setup and Installation
Follow these steps to install the UGREEN CM302 adapter and your M.2 NVMe SSD:
- Prepare your computer: Power off your computer, unplug the power cord, and open the computer case.
- Install the bracket: If necessary, attach the standard or low-profile bracket to the adapter card using the provided screws.
- Insert the M.2 SSD: Gently insert your M.2 NVMe SSD into the M.2 slot on the adapter card. Ensure it is fully seated.
- Secure the SSD: Use the provided screw and standoff to secure the M.2 SSD to the adapter card. Choose the correct standoff position based on your SSD's length (2230, 2242, 2260, or 2280).
- Install the adapter: Locate an available PCIe x4, x8, or x16 slot on your motherboard. Carefully align the adapter card with the slot and press down firmly until it is fully seated.
- Secure the adapter: Secure the adapter card to the computer chassis with a screw.
- Close the case: Close your computer case, reconnect the power cord, and power on your computer.
Image 5.1: Visual guide for installing the adapter and M.2 SSD. Step 1: Install the bezel and tighten screws. Step 2: Insert M.2 hard drive into the card slot. Step 3: Clamp the bolt to the end of the hard disk to secure it.
6. Operating Instructions
Once the UGREEN CM302 adapter and M.2 NVMe SSD are correctly installed, the operating system should automatically detect the new hardware. For Windows and Linux systems, the adapter is typically drive-free, meaning no additional drivers are required.
- New SSD Initialization: If you are using a brand new M.2 NVMe SSD, it will likely need to be initialized and formatted before it can be used.
- Windows: Open 'Disk Management' (right-click 'This PC' > 'Manage' > 'Disk Management'). Locate the new SSD, initialize it (MBR or GPT, GPT is recommended for modern systems), and then create and format a new simple volume.
- macOS/Linux: Use 'Disk Utility' (macOS) or command-line tools like
fdisk/gparted(Linux) to partition and format the drive.
- LED Indicator: The adapter features an LED indicator that provides status information. A solid light typically indicates power, while a blinking light may indicate data activity. Refer to the image below for the LED indicator location.
Image 6.1: Location of the LED indicator on the UGREEN CM302 adapter.
For optimal performance, ensure your operating system and motherboard BIOS/UEFI are up to date.
7. Maintenance
The UGREEN CM302 adapter is designed for reliable, long-term operation with minimal maintenance. Consider the following to ensure its longevity and optimal performance:
- Dust Control: Periodically inspect the inside of your computer case for dust accumulation. Dust can impede airflow and lead to higher operating temperatures. Use compressed air to gently clean the adapter and surrounding components.
- Airflow: Ensure that your computer case has adequate airflow to dissipate heat effectively. The adapter features a porous design for fast heat dissipation.
- Firmware/Drivers: While the adapter is generally drive-free, ensure your motherboard's BIOS/UEFI firmware is updated to the latest version to ensure full compatibility and performance with NVMe SSDs.
Image 7.1: The porous design of the adapter facilitates fast heat dissipation for stable performance.
8. Troubleshooting
If you encounter issues with your UGREEN CM302 adapter, refer to the following troubleshooting tips:
- SSD Not Detected:
- Ensure the adapter is fully seated in the PCIe slot.
- Verify that the M.2 SSD is correctly inserted and secured on the adapter card.
- Check your motherboard's BIOS/UEFI settings to ensure the PCIe slot is enabled and configured correctly for NVMe devices. Some motherboards may require specific settings for NVMe boot or detection.
- Test the M.2 SSD in another compatible device or the adapter with a different M.2 SSD if possible, to rule out component failure.
- Ensure your M.2 SSD is an NVMe (M-Key) type, as this adapter does not support SATA-based M.2 SSDs (B-Key or B+M Key).
- Slow Performance:
- Confirm the adapter is installed in a PCIe 3.0 x4 (or higher) slot on your motherboard for optimal speed. Using a slower PCIe slot (e.g., PCIe 2.0 x1) will limit performance.
- Check your M.2 NVMe SSD's specifications to ensure it is capable of the expected speeds.
- Ensure your operating system is up to date.
- System Instability/Crashes:
- Re-seat the adapter and M.2 SSD to ensure all connections are firm.
- Check for any conflicts with other PCIe devices in your system.
- Ensure your power supply unit (PSU) provides sufficient power to all components.
9. Warranty and Support
UGREEN products are designed with quality and reliability in mind. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official UGREEN website.
If you require technical assistance, have questions about installation, or need to report a product defect, please contact UGREEN customer support through their official website or the contact information provided in your product packaging.
Please have your product model number (CM302 or 70503) and purchase information ready when contacting support.