UGREEN CM302 M.2 NVMe to PCIe3.0x4 Express Card Adapter
Key Features
- UGREEN CM302 (70503)
- PCIe 3.0 x4
- 32Gbps NVMe
- M.2 Key-M
- Wide OS support
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Technical Specifications
General Information
Interface & Performance
Storage Compatibility
System Compatibility
Physical & Environmental
Warranty
Product Description
UGREEN CM302 (70503) M.2 NVMe to PCIe3.0x4 Express Card Adapter
Modern desktops demand faster storage paths. The UGREEN CM302 (70503) M.2 NVMe to PCIe3.0x4 Express Card Adapter solves a real limitation: motherboards without native M.2 slots or with restricted bandwidth. This adapter opens direct PCIe lanes for NVMe performance without replacing your system.
Designed by Ugreen, a globally trusted computer accessories brand, this expansion card targets power users, system builders, and upgraders who want stable PCIe Gen3 speed. No gimmicks. Just direct throughput, clean signal delivery, and wide compatibility.
UGREEN CM302 PCIe Expansion Card Overview for NVMe SSD Upgrades
It converts an available PCIe slot into a high-speed M.2 NVMe interface.
This adapter supports PCIe 3.0 x4 full-speed operation, delivering up to 32Gbps data transmission for NVMe SSDs. It also supports older PCIe standards, allowing use across multiple motherboard generations.
Short build. Solid PCB. Clean connector alignment. Every detail targets signal stability rather than aesthetics.
Technical Specifications and Performance Capabilities of UGREEN CM302
This expansion card supports M.2 PCIe NVMe and AHCI SSDs (Key-M). It fits common M.2 lengths, covering nearly all consumer SSD formats.
Supported M.2 Sizes
- 2230
- 2242
- 2260
- 2280
The adapter operates through the PCI-E interface, using a direct x4 lane configuration when available. This setup removes bottlenecks seen in SATA-based adapters.
Performance Highlights
- NVMe transfer rate up to 32Gbps
- NGFF support up to 6Gbps
- PCIe Gen1, Gen2, and Gen3 motherboard compatibility
- PCIe 3.0 x4 full bandwidth support
No bandwidth sharing. No controller translation layer.
Why Choose UGREEN CM302 NVMe to PCIe Adapter for Desktop PCs
Many desktops still ship without M.2 slots. Others limit NVMe lanes due to chipset design. The UGREEN CM302 fixes both scenarios.
Key Benefits
- Unlocks NVMe speed on older motherboards
- Expands storage without replacing existing drives
- Maintains native PCIe protocol communication
- Works with multiple operating systems
This adapter suits users who value predictable performance and system-level compatibility.
PCIe Gen3 Architecture and Data Stability Explained
The UGREEN CM302 (70503) complies fully with PCIe Gen3 standards. This matters for sustained read/write operations.
Direct PCIe routing reduces latency. NVMe commands reach the CPU faster. Storage-heavy workloads feel more responsive.
This design benefits:
- Game load times
- File transfers
- Development environments
- Virtual machines
The adapter contains no active cooling or power regulation circuits. That design choice reduces failure points.
Thermal Operating Range and Physical Design Considerations
Thermal tolerance defines long-term reliability. The UGREEN CM302 supports a wide operating temperature range from -40°C to 85°C.
This range covers:
- Hot desktop environments
- Long-duration workloads
- High-density PC cases
Physical Details
- Color: Black & Silver
- Dimensions: 150 × 150 × 30mm
- Weight: 100 grams
Lightweight construction keeps PCIe slot stress minimal.
Compatibility with Windows, macOS, and Linux Systems
Cross-platform support matters for professionals and enthusiasts. The UGREEN CM302 supports:
- Windows
- macOS
- Linux
No proprietary drivers required in most environments. The adapter relies on native NVMe support provided by the operating system.
It works with:
- Consumer desktop PCs
- Workstations
- Custom-built systems
Laptop use is not intended due to PCIe slot requirements.
Supported SSD Types and Motherboard Requirements
This adapter supports M.2 PCIe NVMe and AHCI SSDs (Key-M) only. SATA M.2 drives are not compatible unless specified as NGFF.
Motherboard Requirements
- Available PCIe slot (x4, x8, or x16)
- PCIe Gen1, Gen2, or Gen3 support
- BIOS NVMe boot support for boot usage
Booting from NVMe depends on motherboard firmware. Storage access works regardless.
Reliability, Build Quality, and Warranty Coverage
The UGREEN CM302 focuses on electrical stability rather than rugged casing. It does not claim shockproof, waterproof, or dustproof protection.
This transparency builds trust.
The adapter includes a 1-year official warranty, backed by Ugreen. That warranty reflects confidence in component quality and manufacturing standards.
Country of origin and assembly: China.
Ideal Use Cases for UGREEN CM302 Expansion Card
This adapter fits users who want performance without system replacement.
Recommended For
- Desktop upgrades
- NVMe testing platforms
- Secondary high-speed storage
- PCIe slot utilization
Not recommended for external enclosures or mobile setups.
Where to Buy UGREEN CM302 (70503) in Bangladesh
The UGREEN CM302 (70503) M.2 NVMe to PCIe3.0x4 Express Card Adapter is available at PCB Store, a trusted technology retailer in Bangladesh.
Buying from PCB Store offers:
- Authentic Ugreen products
- Local warranty support
- Reliable after-sales service
Stock availability can vary. Checking early helps avoid delays during upgrade planning.
Delivery Charge Info
Inside Dhaka: ৳80
Outside Dhaka: ৳130
FAQs
Does the UGREEN CM302 support NVMe SSD booting?
Yes, if your motherboard BIOS supports NVMe boot. The adapter itself does not restrict boot functionality. Legacy systems may recognize the SSD only as storage, not a boot drive.
Is this adapter compatible with PCIe x16 slots?
Yes. The UGREEN CM302 works in PCIe x4, x8, or x16 slots. It automatically negotiates lanes based on slot and motherboard capabilities.
Does the UGREEN CM302 require external power?
No. Power is supplied directly through the PCIe slot. NVMe SSD power consumption stays within PCIe specifications.
How does thermal performance affect NVMe SSDs on this adapter?
Thermal behavior depends on the SSD and case airflow. The adapter supports high operating temperatures, but adding airflow or heatsinks improves sustained performance.
Can I use SATA M.2 SSDs with this adapter?
No. The UGREEN CM302 supports M.2 PCIe NVMe and AHCI SSDs (Key-M). SATA-based M.2 drives are not supported.
Is the UGREEN CM302 compatible with Linux distributions?
Yes. Linux systems with NVMe support detect the adapter without additional drivers. Kernel-level NVMe modules handle communication.
UGREEN CM302 vs standard SATA expansion cards—what’s the difference?
The CM302 uses PCIe NVMe lanes instead of SATA. This provides significantly higher bandwidth and lower latency than SATA-based expansion cards.
Does this adapter limit SSD speed on PCIe Gen2 systems?
Yes. Speed scales to motherboard PCIe generation. PCIe Gen2 systems offer lower bandwidth than Gen3, but still outperform SATA interfaces.
What is the price of UGREEN CM302 at PCB Store in Bangladesh?
Pricing depends on current stock and market conditions. PCB Store provides updated pricing and availability for the UGREEN CM302 on their official platform.
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