The Ugreen CM302 M.2 NVMe to PCIe 3.0 x4 Expansion Card (Model: 70503) is a high-performance hardware adapter designed to integrate fast M.2 solid-state drives into desktop systems via an available PCIe slot. Engineered with multi-layer circuit protection and robust heat dissipation features, it unlocks maximum PCIe 3.0 speeds for demanding system configurations and storage expansions.
Technical Specifications
- Brand: Ugreen
- Model / SKU: CM302 / 70503
- Host Interface: PCI-E 3.0 x4 (Backward compatible with PCIe 2.0 and 1.0; compatible with x4, x8, and x16 slots)
- Drive Input / Compatibility: M.2 M-Key and M+B Key (Supports NVMe PCIe and SATA protocol drives depending on exact variant configuration)
- Supported Form Factors: 2230, 2242, 2260, and 2280 M.2 SSDs
- Data Transfer Speed: Up to 32 Gbps (NVMe) / Up to 6 Gbps (SATA-based M.2)
- Operating Systems: Windows, Linux, macOS (Driver-free plug-and-play support for major operating systems)
Key Features
- Extreme Data Bandwidth: Utilises a PCIe 3.0 x4 interface to deliver transfer speeds up to 32Gbps, drastically reducing file transfer times and accelerating OS boot operations.
- Comprehensive Multi-Layer Protection: Built-in safeguards protect valuable drive data against over-current, over-voltage, short circuits, and electromagnetic interference (EMI).
- Flexible Chassis Integration: Ships complete with interchangeable low-profile and standard full-height brackets, making it fully compatible with standard tower desktops as well as 2U server enclosures.
- Enhanced Thermal Dissipation: Designed with an included aluminium heat sink and thermal conducting silica gel pad to maintain optimal operating temperatures under heavy sustained workloads.







