# U.2 to PCIe Adapter StarTech PEX4SFF8639 — 2.5" U.2 (SFF-8639) to x4 PCIe 4.0

**URL:** https://aio.lv/en/product--startech-pex4sff8639--4259349
**Data updated:** 2026-03-11 11:45 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** StarTech
**Manufacturer code:** PEX4SFF8639
**EAN:** 0065030872591
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 46.99 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 38.83 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-pex4sff8639--4259349

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

Adapter for connecting a 2.5" U.2 (SFF-8639) NVMe SSD to a host PCIe slot via a x4 PCIe 4.0 interface. The StarTech PEX4SFF8639 provides a red expansion card compatible with PCIe 4.0, activity LED indicators and CE/FCC certifications. Dimensions: 122 × 165 × 22 mm. Suitable for workstation or server upgrades requiring direct NVMe access over PCIe.

## Long description

The StarTech PEX4SFF8639 U.2 to PCIe Adapter is designed to mount a 2.5" U.2 (SFF-8639) NVMe SSD into a desktop computer or server using an available x4 PCIe expansion slot. The adapter provides direct NVMe access over PCIe 4.0 (backward compatible with PCIe 3.0/2.0/1.0), a full-profile bracket for standard drive mounting, and activity LED indicators. Its compact expansion-card form factor (122 × 165 × 22 mm) fits common workstation and server interiors and enables straightforward integration of a U.2 NVMe drive for improved system responsiveness and storage capacity.
Advantages
The adapter enables direct connection of a 2.5" U.2 NVMe SSD to a host PCIe slot without the need for additional data cables, reducing internal cabling and simplifying installation. By supporting four PCIe lanes it allows the SSD to operate at the maximum bandwidth supported by the host slot, delivering low-latency, high-throughput storage access. The integrated activity LEDs provide visible drive status while the full-profile bracket ensures compatibility with standard desktop and server chassis.
Suitable for
Upgrading workstations and servers that need NVMe performance in a PCIe expansion slot
Adding a U.2 NVMe SSD for high-speed scratch, cache, or system drive applications
Integrating enterprise or consumer U.2 drives into systems without native U.2 ports
Testing or validating U.2 NVMe drives in a lab or development environment
Key specifications
Form factor: expansion card with full-profile bracket, dimensions 122 × 165 × 22 mm
Interface to host: x4 PCIe 4.0 (backward compatible with PCIe 3.0/2.0/1.0)
Drive interface: 2.5" U.2 (SFF-8639) NVMe SSD connector supporting 4 PCIe lanes
Indicators: activity LED(s) for drive status
Compatibility: fits standard PCIe x4/x8/x16 slots that expose four lanes
Certifications: CE and FCC
How to use
Power down the computer and open the chassis to access an available PCIe expansion slot. Insert and secure the adapter into a compatible PCIe x4 (or higher) slot on the motherboard, fastening the full-profile bracket to the chassis. Mount the 2.5" U.2 NVMe SSD directly onto the adapter by aligning and seating the drive into the SFF-8639 socket, then secure the drive according to the adapter's mounting points. Close the case, power on the system, and confirm that the host BIOS/UEFI and operating system recognize the NVMe drive. No additional cable is required for the data connection.
Usage recommendations
Install the adapter into a PCIe slot that offers four dedicated lanes to ensure full bandwidth for the U.2 NVMe drive. For optimal thermal performance, position the drive where case airflow or a dedicated SSD cooling solution can dissipate heat during sustained workloads. Verify BIOS/UEFI settings and driver support for NVMe devices, and follow the SSD manufacturer's guidelines for firmware updates and endurance monitoring.

## Specifications

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 15 - 90 |
| Storage temperature (T-T) | -25 - 70 |
| Operating temperature (T-T) | 5 - 50 |

### Technical details

| Feature | Value |
|---|---|
| Sustainability certificates | RoHS |

### Ports & interfaces

| Feature | Value |
|---|---|
| Host interface | PCIe |
| Output interface | U.2 |
| Expansion card standard | PCIe 4.0 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.065 kg |
| Package weight | 161 g |
| Height | 22 mm |
| Width | 122 mm |
| Depth | 165 mm |

### Design

| Feature | Value |
|---|---|
| Internal | Yes |
| Product colour | Red |

### Performance

| Feature | Value |
|---|---|
| Certification | CE, FCC |
| LED indicators | Activity |
| Hot-swap | No |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 490 mm |
| Master (outer) case width | 340 mm |
| Master (outer) case length | 450 mm |
| Products per master (outer) case | 40 pc(s) |
| Harmonized System (HS) code | 84733020 |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 220 mm |
| Package height | 45 mm |
| Package width | 160 mm |
| Quick installation guide | Yes |
| Screws included | Yes |

### Features

| Feature | Value |
|---|---|
| Plug and Play | Yes |

## FAQ

### How much does the U.2 to PCIe Adapter StarTech PEX4SFF8639 cost, and is it available for purchase?

The price is 46.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All StarTech products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized StarTech service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: host interface, weight, internal, output interface, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for U.2 to PCIe Adapter StarTech PEX4SFF8639?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/4259349/58814363_large.webp