# External GPU/PCIe Expansion Chassis Sonnet Echo III Black Aluminium 1 — 400W, 175×424×231 mm

**URL:** https://aio.lv/en/product--sonnet-so-echo-3d-tb3--11823453
**Data updated:** 2026-03-09 11:12 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** Sonnet
**Manufacturer code:** SO-ECHO-3D-TB3
**EAN:** 732311013195
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1 763.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 1 457.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonnet-so-echo-3d-tb3--11823453

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

Sonnet Echo III Black Aluminium 1 is an external PCIe expansion and eGPU chassis with an aluminium housing and black finish. Physical dimensions are 175 × 424 × 231 mm and it includes a 400 W internal power supply. Designed to host PCIe cards (such as graphics cards or I/O cards) for desktop or laptop systems, it enables added GPU or PCIe functionality and external expansion for creative, engineering, or compute-heavy workflows.

## Long description

Sonnet Echo III Black Aluminium 1 is an external PCIe expansion and eGPU chassis in a black aluminium housing designed to add PCIe card capability to Thunderbolt-equipped desktop or laptop systems. With internal dimensions to accept up to three full-length PCIe cards and an integrated 400 W power supply, it enables addition of graphics cards, capture and I/O cards, storage adapters, and network interfaces to systems that lack internal PCIe slots. The compact metal enclosure measures 175 × 424 × 231 mm and connects to the host computer via Thunderbolt 3 or Thunderbolt 4, providing up to 40 Gbps system bandwidth and support for professional workflows on macOS, Windows, and Linux.
Advantages
The Echo III chassis supports three PCIe cards simultaneously through a single Thunderbolt connection, offering a flexible solution for expanding GPU or specialist PCIe functionality without modifying the host system. It includes a built-in 400 W power supply with auxiliary 75 W power for graphics cards, and is engineered for low-noise operation using quiet cooling fans. The rugged aluminium housing provides physical protection and heat dissipation, while two Thunderbolt ports allow connection to the host and daisy-chaining of peripherals. Broad card compatibility covers PCIe 4.0, 3.0, 2.0, and 1.1 cards (non-GPU Thunderbolt-compatible cards are supported) and the unit is compatible with macOS, Windows, and Linux systems that offer Thunderbolt connectivity.
Suitable for
Creative professionals who need external GPU acceleration or multiple PCIe I/O cards
Video capture and transcoding setups requiring additional PCIe inputs
Audio production systems using DSP or HDX-compatible hardware
Engineers and developers needing external network, storage, or accelerator cards
Key specifications
Enclosure material: Black aluminium housing
External dimensions: 175 × 424 × 231 mm
Internal power supply: 400 W with 75 W auxiliary power for GPUs
PCIe slots: Three full-length slots (one x16 plus two x8) supporting full-height, single-width cards or combinations including one double-width card
Thunderbolt connectivity: Two Thunderbolt ports; up to 40 Gbps system throughput via Thunderbolt 3/4
Cooling: Low-noise fans designed for quiet operation
Compatibility: Works with Thunderbolt-equipped macOS, Windows, and Linux systems (check manufacturer compatibility list for specific cards and OS versions)
How to use
Install the desired PCIe cards into the Echo III chassis following the slot layout and securing them to the enclosure. Connect the chassis to a Thunderbolt 3 or Thunderbolt 4 port on the host computer using the provided Thunderbolt cable and plug in the chassis power. The unit can power on and off with the host computer and exposes its installed cards to the operating system; driver installation or firmware updates for individual PCIe cards may be required depending on the card and OS. Use the second Thunderbolt port to connect additional Thunderbolt peripherals in a daisy chain if needed.
Usage recommendations
Verify compatibility of specific PCIe cards with your operating system and Thunderbolt host by consulting the manufacturer’s compatibility documentation. For graphics cards, ensure the card’s power requirements fall within the 400 W supply and the 75 W auxiliary GPU power capability or use a card that fits the supported power profile. Allow adequate ventilation around the aluminium enclosure and place the chassis on a stable surface to maintain cooling efficiency and quiet operation.

## Specifications

| Feature | Value |
|---|---|
| Power supply | 400 W |
| Housing material | Aluminium |
| PCI Express x16 slots | 1 |

### Technical details

| Feature | Value |
|---|---|
| Warranty period | 2 year(s) |

### Ports & interfaces

| Feature | Value |
|---|---|
| Thunderbolt 3 ports quantity | 2 |

### Other features

| Feature | Value |
|---|---|
| Housing colour | Black |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 231 mm |
| Width | 175 mm |
| Depth | 424 mm |

### System requirements

| Feature | Value |
|---|---|
| Windows operating systems supported | Y |
| Mac operating systems supported | Y |

### Packaging data

| Feature | Value |
|---|---|
| Power supply included | Yes |

## FAQ

### How much does the Sonnet Echo III Black Aluminium 1 — External PCIe/eGPU Chassis cost, and is it available for purchase?

The price is 1,763.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 07.07.2026 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, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Sonnet Echo III Black Aluminium 1 — External PCIe/eGPU Chassis be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Sonnet 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 Sonnet 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

## Image

https://aio.lv/img/cache/product/11823453/67289745_large.webp