UGREEN 40Gbps M.2 NVMe SSD Review: Specs, Pros and Cons
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In this ugreen 40gbps m 2 nvme SSD review, we look at the UGREEN CM850 enclosure. This device connects M.2 NVMe drives to your computer via USB4. It supports a maximum transfer speed of 40Gbps, which translates to about 3600Mbps in real-world use. The enclosure also features a built-in active cooling fan to manage heat during heavy workloads. It accepts drives up to 8TB in various form factors. You get a durable aluminum case with a silicone cover for drop protection. This setup is designed for users who need fast, reliable external storage without complex configurations.
What stands out
- 40Gbps theoretical transfer speed via USB4 host interface
- Built-in PWM turbo high-speed active cooling fan
- Supports M/B+M key NVMe drives up to 8TB
- Compatible with 2230, 2242, 2260, and 2280 form factors
- Aluminum case with surrounding silicone cover for drop protection
Who it fits
Good fit for
This enclosure suits video editors, photographers, and gamers who move large files frequently. The 40Gbps speed and active cooling help maintain performance during long transfers. It works well with Windows, Mac OS, Linux, and Android systems. If you use a Mac Mini M4, M5 Pro, or M6, this is a strong option. The plug-and-play design requires no drivers or external power. You can use it with various M.2 SSD sizes, making it versatile for different drive types.
Who should skip it
Skip this if you plan to use SATA or mSATA drives, as it only supports NVMe M/B+M key SSDs. The active fan may produce noise in quiet environments. Users who prefer passive cooling might find the built-in fan intrusive. If you need a drive smaller than 2230 or larger than 2280, this model will not fit your hardware. Additionally, if you require a drive capacity greater than 8TB, this enclosure has a hard limit. You should also avoid it if you need a completely silent operation without any moving parts.
Verdict: The UGREEN CM850 offers fast 40Gbps transfers and effective active cooling for NVMe drives. It is a solid choice for users needing high-speed external storage with broad compatibility.
Key specs explained for UGREEN enclosure
Max Transfer Speed: 40Gbps
This limit defines the raw bandwidth between the drive and your host port. The listing notes real-world speeds reach about 3600Mbps. You benefit when moving large files, such as 4K video projects or game libraries. Compare this to USB 3.2 Gen 2x2 enclosures, which cap at 20Gbps. Higher speeds reduce wait times for heavy data transfers.
Host Interface: USB4
This indicates the physical connection standard the enclosure uses to talk to your computer. USB4 offers the highest theoretical throughput for this device. You need a USB4, Thunderbolt 3, or Thunderbolt 4 port to achieve the full 40Gbps speed. Standard USB-A ports will limit performance. Check your computer’s ports before purchasing to ensure compatibility.
Cooling System: Built-in active fan
Unlike passive aluminum cases, this unit includes a PWM turbo fan. It automatically adjusts speed to maintain safe operating temperatures. This is crucial for NVMe drives, which can throttle performance when hot. You benefit during sustained write tasks, such as editing video directly from the drive. The fan helps preserve the drive’s lifespan by preventing thermal stress.
Supported Form Factors: 2230, 2242, 2260, 2280
These numbers describe the length of the M.2 SSD the enclosure accepts. 2280 is the standard length for most desktop and laptop drives. 2230 is common for Steam Deck or ROG Ally modules. This flexibility allows you to use various drive sizes. Ensure your specific NVMe module matches one of these lengths to fit correctly inside the case.
Maximum Capacity: 8TB
This is the largest storage size the enclosure’s controller supports. You can install drives up to this limit for extensive media archives or virtual machines. Smaller drives, like 512GB or 1TB, also work fine. This cap ensures the controller can address all the storage blocks. Check your drive’s actual capacity before buying to ensure it falls within this range.
Build quality and physical design
The UGREEN CM850 enclosure features an aluminum case with a silver finish. According to the listing, the body includes a surrounding silicone cover. This design choice aims to prevent damage from accidental drops. The active cooling system is built directly into the unit. It uses a PWM turbo high-speed fan that adjusts its speed automatically. This maintains normal temperatures during operation. You do not need to manage external cooling accessories. The layout is simple and straightforward. There are no external buttons or switches visible on the exterior. The device operates on a plug-and-play basis. You do not need to install additional drivers or connect extra power supplies. This makes the setup process quick and reliable for most users. The physical dimensions are listed as 22.6 inches in width, 7.24 inches in height, and 48.3 inches in length. The total weight is 4.8 ounces. These measurements describe the packaging or overall product profile rather than the small enclosure itself. The actual enclosure fits M.2 drives in 2230, 2242, 2260, and 2280 form factors. It supports drives up to 8TB capacity. The compact nature of the drive bay allows you to carry it easily. The aluminum shell helps dissipate heat from the NVMe SSD inside. The silicone cover adds a layer of protection against minor impacts. This combination of materials suits users who move between workspaces or travel frequently. The design prioritizes durability and thermal management without adding bulk. You get a sturdy housing that protects your data drive during transport. The finish is clean and professional. It fits well in office or studio environments. The active fan ensures consistent performance even under heavy loads. This is important for video editors and photographers who transfer large files regularly. The simple interface means you can focus on your work rather than managing hardware.
Setup and everyday use guide
You do not need to install drivers or connect an external power supply to use this enclosure. The listing describes it as a plug-and-play device. You simply insert your M.2 NVMe drive into the slot. The unit draws power directly from your host port. This applies whether you connect via USB4, Thunderbolt 3, or older USB standards. The ASM2464PD controller handles the translation between your drive and the host interface. This chip enables the 40Gbps theoretical limit. You benefit from UASP support, which improves data transfer efficiency on compatible systems. You also get TRIM support, which helps maintain drive performance over time. The enclosure accepts M/B+M key NVMe drives. It fits 2230, 2242, 2260, and 2280 form factors. You can use drives up to 8TB in capacity. The built-in PWM fan adjusts its speed automatically. This active cooling system aims to keep temperatures stable during heavy workloads. You do not need to manage fan settings manually. The silicone cover adds a layer of protection against drops. This setup works well for Windows, Mac OS, Linux, and Android hosts. It is not compatible with SATA or mSATA drives. You simply plug it in and start transferring files. The process is straightforward and requires no technical configuration.
Before you buy this UGREEN enclosure
You need an M.2 NVMe drive to use this enclosure. The listing supports M/B+M key drives up to 8TB in 2230, 2242, 2260, and 2280 sizes. It does not work with SATA or mSATA drives. Check your host port for USB4 or Thunderbolt 3/4 for best speeds. Windows, Mac OS, Linux, and Android systems are supported. The active fan requires no extra power. You should monitor drive temperatures during heavy transfers. This enclosure fits into the NVMe & SATA SSDs category as a high-speed external solution. It suits users who need fast data movement for video editing or gaming. Compare it with other USB4 enclosures if you require different form factors. Ensure your drive fits the slot before purchasing. The silicone cover adds drop protection. Keep the fan vents clear for optimal cooling.
Check before you buy
- Verify your drive is M/B+M key NVMe, not SATA.
- Check if your host port supports USB4 or Thunderbolt.
- Confirm your drive size fits 2230, 2242, 2260, or 2280.
- Ensure your operating system is Windows, Mac, Linux, or Android.
The product at a glance
UGREEN 40Gbps M.2 NVMe SSD Enclosure
Best for: USB4 users needing active NVMe cooling
- Max Transfer Speed
- 40Gbps
- Host Interface
- Thunderbolt 4/3, USB4
- Drive Interface
- M/B&M Key NVMe
- Supported Form Factors
- 2230/2242/2260/2280
- Cooling System
- PWM turbo cooling fan, aluminium case
- Maximum Capacity
- 8TB
View on Amazon: UGREEN 40Gbps M.2 NVMe SSD Enclosure Affiliate link
This UGREEN enclosure lets you connect an M.2 NVMe drive via USB4 for up to 40Gbps transfers. It includes a built-in PWM cooling fan to manage heat during high-speed use. The aluminum case fits 2230, 2242, 2260, and 2280 drives with capacities up to 8TB. It supports Windows, Mac, Linux, and Android. You get plug-and-play operation without extra power or drivers.
Pros
- USB4 host interface supports 40Gbps theoretical speeds
- Built-in PWM fan for active cooling
- Supports 2230, 2242, 2260, and 2280 form factors
- Aluminum case with silicone drop protection
Cons
- Requires a compatible USB4 or Thunderbolt 3/4 port for max speed
- Does not support SATA NGFF or mSATA drives
- Active fan adds moving parts that may wear over time
Good fit if
- You need fast external storage for large video files
- You use a laptop with USB4 or Thunderbolt ports
- You want active cooling for sustained write speeds
Skip if
- You only have USB 3.0 ports available
- You own a SATA or mSATA SSD
- You prefer silent operation without fans
Verdict: UGREEN 40Gbps NVMe Enclosure with Fan is a solid choice for users with USB4 ports who need active cooling for large NVMe drives. It fits 2230 to 2280 modules and handles up to 8TB.
Specifications side by side
| Spec | UGREEN 40Gbps M.2 NVMe SSD Enclosure |
|---|---|
| Max Transfer Speed | 40Gbps |
| Host Interface | Thunderbolt 4/3, USB4 |
| Drive Interface | M/B&M Key NVMe |
| Supported Form Factors | 2230/2242/2260/2280 |
| Cooling System | PWM turbo cooling fan, aluminium case |
| Maximum Capacity | 8TB |
| Interface | NVMe |
| Form Factor | M.2 2280 |
| Cooling | Cooling Fan |
| Transfer Speed | 40Gbps |
| Dimensions | 48.3 × 22.6 × 7.24 inches |
| Weight | 4.8 ounces |
| Size | 2230/2242/2260/2280 |
| Color | silver |
| Model | CM850 |
Frequently asked questions
Does the UGREEN CM850 support 2230 M.2 drives?
Yes, the enclosure supports multiple form factors including 2230. It is designed to fit 2230, 2242, 2260, and 2280 modules. This flexibility allows you to use smaller drives often found in laptops or handheld gaming devices alongside standard desktop-sized drives without needing a different enclosure.
Is active cooling necessary for this NVMe enclosure?
The UGREEN CM850 includes a built-in cooling fan for active thermal management. This is particularly useful for users with USB4 ports who plan to transfer large files frequently. The active cooling helps maintain performance by preventing thermal throttling during sustained write operations on high-speed NVMe drives.
What is the maximum storage capacity supported?
The listing states the enclosure handles drives up to 8TB. You can install any M.2 NVMe drive within the supported sizes that falls under this capacity limit. This makes it suitable for users who need to store large media libraries or extensive project files externally.
Does it require an external power adapter?
No, the device does not require an external power supply. It draws power directly from your host port via the USB connection. This plug-and-play design simplifies setup, as you only need to insert the drive and connect the cable to your computer to begin using it immediately.
Can I use SATA M.2 drives with this enclosure?
No, this enclosure is strictly for NVMe drives. It does not work with SATA or mSATA drives. You must ensure your M.2 module uses the NVMe protocol and has an M key interface. Using the wrong drive type will result in the enclosure not recognizing the storage device.
What host ports are required for 40Gbps speeds?
To achieve the maximum 40Gbps transfer speed, you need a USB4 or Thunderbolt 3/4 port on your computer. While it may connect to other USB ports, higher speeds require these specific interfaces. Check your computer’s specifications to ensure your host port supports the necessary bandwidth for optimal performance.