---
product_id: 602847556
title: "M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket Compatible with Oculink/M.2 NVMe Laptop eGPU GDP Handhelds (Dock-OC4)"
brand: "jmt"
price: "567.96 DT"
currency: TND
in_stock: true
reviews_count: 9
category: "Jmt"
url: https://www.desertcart.tn/products/602847556-m-2-m-key-to-pcie-4-0x4-external-graphics
store_origin: TN
region: Tunisia
---

# PCIe 4.0 x4 Gen4 bandwidth Compatible with Oculink & M.2 NVMe devices Supports ATX/SFX 500W+ power supply M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket Compatible with Oculink/M.2 NVMe Laptop eGPU GDP Handhelds (Dock-OC4)

**Brand:** jmt
**Price:** 567.96 DT
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your laptop’s GPU game—because your workflow deserves a power boost!

## Quick Answers

- **What is this?** M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket Compatible with Oculink/M.2 NVMe Laptop eGPU GDP Handhelds (Dock-OC4) by jmt
- **How much does it cost?** 567.96 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/602847556-m-2-m-key-to-pcie-4-0x4-external-graphics)

## Best For

- jmt enthusiasts

## Why This Product

- Trusted jmt brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Blazing PCIe 4.0 x4 Speeds:** Unlock ultra-fast data transfer with Gen4 bandwidth, future-proofing your eGPU setup.
- • **Sleek Tabletop Mount Design:** Compact, sturdy bracket fits perfectly on your desk without clutter or bulky enclosures.
- • **Powerful External GPU Support:** Plug in high-end graphics, network, sound, or capture cards with reliable power delivery.
- • **Plug & Play with Smart Power Sync:** Enjoy synchronized start/stop with your host device—no hot-swap needed, just smooth operation.
- • **Universal Oculink & M.2 Compatibility:** Seamlessly expand your laptop or handheld GPU capabilities with broad device support.

## Overview

The JMT M.2 M-Key to PCIe 4.0 x4 External Graphics Card Stand Bracket is a cutting-edge adapter designed for professionals seeking to expand their laptop or handheld GPU capabilities. Compatible with Oculink and M.2 NVMe ports, it supports high-speed PCIe 4.0 Gen4 bandwidth and a variety of PCIe cards including GPUs, network, sound, and capture cards. Requiring an external 500W+ power supply, this sleek tabletop mount offers reliable power delivery and synchronized start/stop functionality, making it an ideal solution for boosting graphics performance without investing in a new PC.

## Description

JMT M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket Compatible with Oculink / M.2 NVMe Laptop eGPU GDP Handhelds Product Description: 1, O culink adapter board, support devices with O culink port to expand PCIE card. 2, Support M.2 port, through the standard O culink extension cable to PCIE card. 3, Support expanding GPU graphics card, PCIE network card, PCIE sound card, PCIE capture card, etc. PCIE array card only supports X4 devices. 4, The maximum bandwidth speed is PCIE 4.0 X4 GEN4, backward compatible with GEN3. 5, Support ATX\SFX\small 1U power supply, the adapter board only needs to be inserted into the 24P power supply, the graphics card power supply is provided by other power supplies. Power supply should be 500W and above. 6, Support synchronous start and stop following the host, does not support hot-swap. 7, Only GDP handhelds with o culink ports have been successfully tested for compatibility, other hosts with O culink ports are still being collected. 8, The successful compatibility rate is 90% for laptops with M.2 ports, 95% for small hosts with M.2 ports, and 95% for other hosts. 9, This series of kit products do not include O culink extension cable, need to purchase separately. 10, This series of boxes do not support built-in power supply, and limit the size of the graphics card.

Review: Was apprehensive but it works well - Was initially a little apprehensive about this - I needed more vram for diffusion models, and didn't have a fortune to spend on a new gaming pc (I have a not so old MSI Raider GE76 12UH, but with only 8gb of vram). I'd only read about epgu's, and managed to snag a second hand RTX 3090 at a reasonable price. I decided to take the plunge. I plugged it all together, and turned on with always on switch on (I should note I was using a different m2 oculink card in my laptop) and booted up. Immediately device manager sees a generic windows display adapter. Reinstalled drivers, now device manager sees a RTX 3090, but stopped with error 43. Did some googling, and found and ran the error 43 fixer - did it's thing, but still reported the same error. Uninstalled and reinstalled the driver cleanly - still no luck. Went back to basics - tried swapping out my old m2 card with the one supplied in the kit. Booted up, and voilà! RTX 3090 installed and working! Don't know if it was the card, the error fixer or a combination of both, but it now works flawlessly. I shut everything down, tried flipping the switch to auto power on when it detects power from laptop and guess what? that worked too! It might be cheap and cheerful, but I can testify it works, and am immensely relieved that it does as it saved me a fortune needing a new pc, or being stuck with a graphics card I can't use. Hooking it up together was simple - just connect the atx24 pin power connected to the board, your oculink cable in the relevant port, and your GPU into the PCI slot. Hook power up to your GPU directly. Not had a chance to test performance with games, but I'm sure people have already done that - I'm not using it for gaming, so the performance loss should be minimal and so far using flux it's a huge improvement on my own board 3080. It's a shame the kit doesn't provide a cable too, but the one shown in "people also bought this" section for another 20 quid worked just fine.
Review: Worked perfectly as described by others. - Buy the cable marked as people also bought and use m.2slot Might need 10mm motherboard stand-offs or longer threaded screws for the unit to fit graphics card, where screws connect the base plate to vertical plate, so you don’t need to bend the vertical plate. Other than that perfect.

## Features

- Oculink-Compatible adapter board, support devices with O culink port to expand PCIE card.
- Support M.2 port, through the standard O culink extension cable to PCIE card.
- Support expanding GPU graphics card, PCIE network card, PCIE sound card,?PCIE capture card, etc. PCIE array card only supports X4 devices.
- Support ATXSFXsmall 1U power supply, the adapter board only needs to be inserted into?the 24P power supply, the graphics card power supply is provided by other power supplies.??Power supply should be 500W and above.
- This series of boxes do not support built-in power supply, and limit the size of the graphics card. (Do not include O culink extension cable)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CRR7HMX5 |
| Best Sellers Rank | 54,889 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 266 in Graphics Cards |
| Brand | JMT |
| Brand Name | JMT |
| Colour | Black |
| Compatible Devices | Desktop, Laptops |
| Compatible Phone Models | Universal |
| Compatible devices | Desktop, Laptops |
| Compatible phone models | Universal |
| Compatible with Vehicle Type | ATV, Automobile, Truck |
| Country of Origin | China |
| Customer Reviews | 4.2 out of 5 stars 60 Reviews |
| Enclosure Material | Metal, Plastic |
| Global Trade Identification Number | 00783798005388 |
| Item Weight | 0.32 Kilograms |
| Manufacturer | JMT |
| Manufacturer Part Number | F51620 |
| Model Name | AMD Radeon RX 6800 XT |
| Model Number | F51620 |
| Mounting Type | Tabletop Mount |
| Mounting type | Tabletop Mount |
| Product Features | One-Hand Operation |
| Product Warranty | 1 |
| Special feature | One-Hand Operation |
| UPC | 783798005388 078379800538 |

## Product Details

- **Brand:** JMT
- **Colour:** Black
- **Compatible devices:** Desktop, Laptops
- **Compatible phone models:** Universal
- **Mounting type:** Tabletop Mount

## Images

![M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket Compatible with Oculink/M.2 NVMe Laptop eGPU GDP Handhelds (Dock-OC4) - Image 1](https://m.media-amazon.com/images/I/51iEVpWlzmL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Was apprehensive but it works well
*by T***6 on 20 August 2025*

Was initially a little apprehensive about this - I needed more vram for diffusion models, and didn't have a fortune to spend on a new gaming pc (I have a not so old MSI Raider GE76 12UH, but with only 8gb of vram). I'd only read about epgu's, and managed to snag a second hand RTX 3090 at a reasonable price. I decided to take the plunge. I plugged it all together, and turned on with always on switch on (I should note I was using a different m2 oculink card in my laptop) and booted up. Immediately device manager sees a generic windows display adapter. Reinstalled drivers, now device manager sees a RTX 3090, but stopped with error 43. Did some googling, and found and ran the error 43 fixer - did it's thing, but still reported the same error. Uninstalled and reinstalled the driver cleanly - still no luck. Went back to basics - tried swapping out my old m2 card with the one supplied in the kit. Booted up, and voilà! RTX 3090 installed and working! Don't know if it was the card, the error fixer or a combination of both, but it now works flawlessly. I shut everything down, tried flipping the switch to auto power on when it detects power from laptop and guess what? that worked too! It might be cheap and cheerful, but I can testify it works, and am immensely relieved that it does as it saved me a fortune needing a new pc, or being stuck with a graphics card I can't use. Hooking it up together was simple - just connect the atx24 pin power connected to the board, your oculink cable in the relevant port, and your GPU into the PCI slot. Hook power up to your GPU directly. Not had a chance to test performance with games, but I'm sure people have already done that - I'm not using it for gaming, so the performance loss should be minimal and so far using flux it's a huge improvement on my own board 3080. It's a shame the kit doesn't provide a cable too, but the one shown in "people also bought this" section for another 20 quid worked just fine.

### ⭐⭐⭐⭐⭐ Worked perfectly as described by others.
*by D***Y on 7 April 2026*

Buy the cable marked as people also bought and use m.2slot Might need 10mm motherboard stand-offs or longer threaded screws for the unit to fit graphics card, where screws connect the base plate to vertical plate, so you don’t need to bend the vertical plate. Other than that perfect.

### ⭐ Don't buy it
*by D***G on 4 March 2026*

Does not power on. There's NO instruction at all, no cable that was shown in the image that include so you will have to buy it separately. Barely any information about setting it up online. Highly not recommended. I have tried all 3 working PSU, all 3 different GPU and none of them works at all. I have also tried to test switch (still nothing).

## Frequently Bought Together

- JMT M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket Compatible with Oculink/M.2 NVMe Laptop eGPU?GDP Handhelds (Dock-OC4)
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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-15*