Home>Computer Accessories>For M.2 NVMe to U.2 PCIe 5/ U.3 PCIE 4.0X4SSD SFF8639 Adapter Hard Drive CNC Alloy Enclosure 2230/2242/2260/2280 SSD M2 DDR4

For M.2 NVMe to U.2 PCIe 5/ U.3 PCIE 4.0X4SSD SFF8639 Adapter Hard Drive CNC Alloy Enclosure 2230/2242/2260/2280 SSD M2 DDR4 Item NO.: F54451-D1 F54451-D2

US$ 25.69

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Product Name	For M.2 NVMe to U.2 PCIe 5/ U.3 PCIE 4.0X4SSD SFF8639 Adapter Hard Drive CNC Alloy Enclosure 2230/2242/2260/2280 SSD M2 DDR4
Item NO.	F54451-D1 F54451-D2
Weight	0.03 kg = 0.0661 lb = 1.0582 oz
Category	Computer Accessories
Creation Time	2025-08-08

Specifications:
Product Model: R74B 5.0; R74C

Product Name: M.2 (M-key) NVMe to U.2 (SFF-8639) Hard Drive Enclosure

M.2 (M-key) NVMe to U.3 (SFF-TA-1001) Hard Drive Enclosure

Speed Bandwidth: PCIe 4.0 x4 64Gbps; PCIe 5.0 x4 128Gbps (does not support SATA protocol)

Product Dimensions: Length 100.3 x Width 70 x Height 7 mm

Product Weight: 59g (excluding SSD)

Colour: Black

Operating Temperature: -40°C to 80°C

Flame Retardant Rating: 94V0

1. Supports PCIe 5.0 x4, compatible with Gen3/Gen4

2. Designed with a high-current DC-DC module to ensure stable operating voltage under load conditions

3. Additional protective circuits ensure safe SSD operation

4. Full aluminum alloy housing with CNC precision machining, durable and portable, with fast heat dissipation and thermal conductivity

5. For Foxconn PCIe Gen5 connector LDP1683-15B38-9H, LCP flame-retardant high-temperature resistant plastic steel material, with a 30u thick gold plating

6. High-speed, low-resistance, high-temperature resistant, and oxidation-resistant PCB board material

Technical Issues Summary:

Are R74B 5.0 and R74C compatible with each other?

The product pin definitions are different. R74B 5.0 is a U.2 hard drive enclosure, while R74C is a U.3 hard drive enclosure. They are not compatible with each other. Please note the distinction.

Do models R74B and R74C support PCIe 5.0?

Laboratory testing using our company's adapter card shows that R74B can still achieve PCIe 5.0. The test data is shown in the figure below:

Laboratory tests show that the R74C can still achieve PCIe 4.0 after using our adapter card. The test data is shown in the figure below:

Why does the casing get very hot during use?

Hard drives generate heat during use. The hard drive enclosure uses a CNC aluminum alloy casing and transfers heat from the SSD to the casing via a thermal pad, so the casing will become noticeably hot. This is to better dissipate heat from the SSD.

Specifications: