1. Introduction
The ACASIS 40Gbps M.2 NVMe SSD Enclosure (Model TBU401) provides a high-speed, portable solution for external data storage. Designed for M.2 NVMe SSDs, it offers exceptional data transfer rates and broad compatibility with various devices and operating systems. This manual provides essential information for proper setup, operation, and maintenance of your enclosure.
Figure 1: ACASIS 40Gbps M.2 NVMe SSD Enclosure (TBU401) and included USB-C cable.
2. Package Contents
Verify that all items listed below are present in your package:
Figure 2: Contents of the ACASIS TBU401 package.
- ACASIS 40Gbps M.2 NVMe SSD Enclosure (TBU401)
- 40Gbps USB-C to USB-C Cable
- User Manual
- Silicone Thermal Pads (x2)
- SSD Size Adapter
- Rubber Stopper
3. Setup and Installation
The ACASIS TBU401 features a tool-less design for easy and quick installation of your M.2 NVMe SSD.
Figure 3: Visual guide for tool-free SSD installation.
- Open the bottom plate: Gently slide the bottom cover of the enclosure to open it.
- Insert NVMe SSD: Align your M.2 NVMe SSD with the slot and insert it firmly. Secure the SSD with the provided fixed rubber stopper to prevent it from falling off.
- Apply Thermal Pad: Place a silicone thermal pad onto the SSD to aid in heat dissipation.
- Close the lower cover: Slide the bottom cover back into place until it clicks securely.
- Connect to computer: Use the certified 40Gbps USB-C cable to connect the enclosure to your computer. The device is plug-and-play and requires no drivers.
4. Compatibility
The TBU401 enclosure offers broad compatibility with various NVMe SSDs, operating systems, and host devices.
4.1. SSD Compatibility
Figure 4: Supported M.2 NVMe SSD types and sizes.
- SSD Type: Supports M-Key and B+M Key NVMe PCIe SSDs.
- SSD Sizes: Compatible with M.2 form factors 2230, 2242, 2260, and 2280.
- Capacity: Supports NVMe SSDs up to 8TB.
- Note: SATA NGFF SSDs or mSATA SSDs are not supported.
4.2. Device and System Compatibility
Figure 5: Partial compatibility list for devices and operating systems.
- Compatible Interfaces: Fully compatible with USB4, and backward compatible with USB 3.2, USB 3.1, USB 3.0, and USB 2.0.
- Operating Systems: Supports Windows (7 and above), Mac OS (10.2 and above), Linux (5.6 and above), and Android.
- Drivers: No drivers required for operation.
5. Performance
The ACASIS TBU401 enclosure is equipped with JHL7440 + RTL9210 dual chips, ensuring stable and reliable data transfer at high speeds.
5.1. Data Transfer Speeds
Figure 6: Example Disk Speed Test results on a MacBook Pro with Samsung 980 Pro.
- Theoretical Max Speed: 40Gbps.
- Tested Speeds: Up to 2805.58MB/s read and 2734.79MB/s write (results may vary by system configuration and SSD used).
- Expected Speeds: Due to the 18Gbps available bandwidth of the DisplayPort signal, expected read/write speeds are typically between 2500-3000MB/s.
5.2. Official Product Video: ACASIS 40Gbps NVMe Enclosure Overview
Video 1: An official product video from CZ-Store showcasing the ACASIS 40Gbps NVMe Enclosure, highlighting its features and design.
6. Operating Instructions
The ACASIS TBU401 is designed for ease of use. Once your NVMe SSD is installed, simply connect the enclosure to your device using the provided USB-C cable. It is plug-and-play, requiring no additional drivers for most compatible operating systems.
Figure 7: The ACASIS TBU401 in use, connected to a laptop for data transmission.
7. Maintenance and Heat Dissipation
The enclosure is constructed from rugged aluminum alloy, which acts as an effective heatsink. Combined with the included silicone thermal pads, this design ensures efficient heat dissipation without the need for a noisy mechanical fan.
Figure 8: Illustration of the enclosure's heat dissipation mechanism.
To maintain optimal performance and longevity of your SSD, ensure the thermal pad is correctly placed during installation. Keep the enclosure clean and free from dust buildup to prevent any obstruction of the heat-dissipating surfaces.
8. Troubleshooting
8.1. Why can't I reach the expected speed of 2500-3000 MB/s?
Figure 9: Explanation of potential speed discrepancies.
The theoretical 40Gbps bandwidth does not directly translate to 4000MB/s in real-world scenarios. This is primarily due to the 18Gbps available bandwidth of the DisplayPort (DP) signal, which is utilized by the USB4 interface. Therefore, expected real-world read/write speeds are typically between 2500-3000MB/s.
If your speeds are significantly lower than this range, please ensure:
- You are using the certified 40Gbps cable provided with the enclosure.
- Your host device (computer, laptop) supports USB4 or Thunderbolt 3/4.
- The NVMe SSD installed is capable of high speeds (e.g., PCIe Gen3 or Gen4 NVMe SSDs).
- The SSD is properly seated and secured within the enclosure.
For further assistance, please contact ACASIS technical support.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | ACASIS |
| Model Number | TBU401 |
| Hardware Interface | Thunderbolt / USB4 (backward compatible with USB 3.2/3.1/3.0/2.0) |
| Chipset | JHL7440 + RTL9210 Dual Chip |
| Compatible SSD Type | M.2 NVMe PCIe (M-Key, B+M Key) |
| Supported SSD Sizes | 2230, 2242, 2260, 2280 |
| Max Memory Storage Capacity | 8 TB |
| Data Transfer Rate (Expected) | 2500-3000 MB/s (Read/Write) |
| Material | Aluminum Alloy |
| Product Dimensions | 4.09"L x 2.13"W x 0.63"H (approx. 3.94 x 0.57 x 2.4 inches) |
| Item Weight | 137 Grams (approx. 4.8 ounces) |
| Compatible Devices | Laptop, Desktop, Tablet (Mac, PC, Linux, Multimedia, Gaming, Business) |
10. Warranty and Support
ACASIS is committed to providing high-quality products and excellent customer service.
Figure 10: ACASIS After-Sales Service details.
- Email Support: support@acasis.com
- Service Availability: 7x24 hours online service.
- Quality Assurance: High-quality and considerate service is provided for all ACASIS products.
