---
product_id: 654529441
title: "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)"
brand: "jmt"
price: "S$241"
currency: SGD
in_stock: true
reviews_count: 5
category: "Jmt"
url: https://www.desertcart.sg/products/654529441-jmt-m-2-m-key-to-pcie-4-0x4-external
store_origin: SG
region: Singapore
---

# PCIe 4.0 x4 Gen4 bandwidth Compatible with Oculink & M.2 NVMe devices Supports ATX/SFX 500W+ power supply 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)

**Brand:** jmt
**Price:** S$241
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your graphics game—expand beyond limits with JMT’s PCIe powerhouse!

## Quick Answers

- **What is this?** 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) by jmt
- **How much does it cost?** S$241 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/654529441-jmt-m-2-m-key-to-pcie-4-0x4-external)

## 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.
- • **Plug & Play Sync Start/Stop:** Experience smooth system integration with synchronous power control—no hot-swap, but flawless startup.
- • **Compact & Sleek Tabletop Design:** Minimal footprint with metal/plastic build, perfect for professional desks and mobile setups.
- • **Universal Oculink & M.2 Compatibility:** Seamlessly expand your laptop or handheld GPU capabilities with broad device support.
- • **Power Flexibility for High-Performance GPUs:** Supports standard ATX/SFX power supplies 500W+, ensuring stable power delivery for demanding cards.

## 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 boost their laptop or handheld GPU performance. Compatible with Oculink and M.2 NVMe ports, it supports PCIe 4.0 Gen4 speeds and a variety of PCIe cards including GPUs, network, sound, and capture cards. It requires an external 500W+ ATX/SFX power supply and features synchronous start/stop functionality for seamless integration. Its compact tabletop mount and robust metal/plastic construction make it ideal for millennial managers demanding high performance and sleek setups.

## 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: 1 of 4 worked. DO NOT BUY - first worked. Need smaller, two fan gpus for these docks and no oculink cable is included. Tight fit but that may protect gpu if you move it. NEXT THREE I BOUGHT DID NOT WORK!!!!
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.

## 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 | #69,485 in Electronics ( See Top 100 in Electronics ) #41 in Graphics Cards |
| Brand | JMT |
| Brand Name | JMT |
| Colour | Black |
| Compatible Devices | Laptop, Small Form Factor Computer |
| Customer Reviews | 4.3 out of 5 stars 59 Reviews |
| Enclosure Material | Metal And Plastic |
| Global Trade Identification Number | 00783798005388 |
| Item Weight Unit of Measure | 0.32 Kilograms |
| Manufacturer | JMT |
| Manufacturer Part Number | F51620 |
| Material | Metal And Plastic |
| Model Name | AMD Radeon RX 6800 XT |
| Model Number | F51620 |
| Mounting Type | Tabletop Mount |
| Product Features | Unique Start/Stop Functionality |
| Special Feature | Unique Start/Stop Functionality |
| UPC | 783798005388 078379800538 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** JMT
- **Colour:** Black
- **Compatible Devices:** Laptop, Small Form Factor Computer
- **Mounting Type:** Tabletop Mount
- **Special Feature:** Unique Start/Stop Functionality

## Images

![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) - Image 1](https://m.media-amazon.com/images/I/51iEVpWlzmL.jpg)
![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) - Image 2](https://m.media-amazon.com/images/I/5183qVZZ+zL.jpg)
![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) - Image 3](https://m.media-amazon.com/images/I/61sSx6pySlL.jpg)
![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) - Image 4](https://m.media-amazon.com/images/I/41v8sZnfUKL.jpg)
![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) - Image 5](https://m.media-amazon.com/images/I/611lEjzLKRL.jpg)

## Available Options

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

## Customer Reviews

### ⭐ 1 of 4 worked. DO NOT BUY
*by M***A on 10 February 2026*

first worked. Need smaller, two fan gpus for these docks and no oculink cable is included. Tight fit but that may protect gpu if you move it. NEXT THREE I BOUGHT DID NOT WORK!!!!

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Fa il suo mestiere
*by A***I on 11 March 2025*

Fa il suo mestiere. Su schede modeste come 4060Ti non crea neppure particolari colli di bottiglia. 3dMark ottiene punteggi pari al bus gen4 8X nativo

## Frequently Bought Together

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-06-05*