---
product_id: 642386460
title: "Support External Graphics Card M.2 M-Key to PCIE 4.0X4, Compatible with Oculink/M.2 NVMe Laptop eGPU?GDP Handheld (Dock-OC4)"
brand: "jmt"
price: "2719 DH"
currency: MAD
in_stock: true
reviews_count: 5
category: "Jmt"
url: https://www.desertcart.ma/products/642386460-support-external-graphics-card-m-2-m-key-to-pcie
store_origin: MA
region: Morocco
---

# PCIe 4.0 x4 Gen4 bandwidth Oculink & M.2 NVMe compatibility Supports ATX/SFX 500W+ PSU Support External Graphics Card M.2 M-Key to PCIE 4.0X4, Compatible with Oculink/M.2 NVMe Laptop eGPU?GDP Handheld (Dock-OC4)

**Brand:** jmt
**Price:** 2719 DH
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your laptop’s power game—because your workflow deserves a graphics upgrade!

## Quick Answers

- **What is this?** Support External Graphics Card M.2 M-Key to PCIE 4.0X4, Compatible with Oculink/M.2 NVMe Laptop eGPU?GDP Handheld (Dock-OC4) by jmt
- **How much does it cost?** 2719 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/642386460-support-external-graphics-card-m-2-m-key-to-pcie)

## 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

- • **Compact Yet Mighty:** Designed for small form-factor setups with tabletop mounting, perfect for professionals craving high performance without bulk.
- • **Smart Start/Stop Sync:** Enjoy hassle-free synchronous power on/off with your host device—no more manual toggling, just instant readiness.
- • **Unleash Next-Gen Speed:** Experience blazing PCIe 4.0 x4 Gen4 bandwidth for ultra-responsive GPU and expansion card performance.
- • **Universal Expansion Hub:** Transforms your Oculink or M.2 NVMe laptop into a powerhouse with support for GPUs, network, sound, and capture cards.
- • **Plug & Power with Confidence:** Seamlessly integrates with ATX/SFX power supplies 500W and above, ensuring stable and efficient power delivery.

## Overview

The JMT Support External Graphics Card M.2 M-Key to PCIe 4.0X4 adapter is a cutting-edge expansion solution that leverages Oculink and M.2 NVMe ports to connect high-performance PCIe x4 devices like GPUs, network, sound, and capture cards. Supporting PCIe Gen4 speeds and requiring a 500W+ ATX/SFX power supply, it enables laptops and compact hosts to break free from onboard limitations. With smart synchronous start/stop functionality and broad compatibility, it’s the ultimate upgrade path for professionals seeking desktop-grade graphics power on the go.

## 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: Fa il suo mestiere - 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

## Features

- Oculink compatible adapter card, supports devices with O culink port to expand PCIE card.
- Support M.2 port, through standard O culink extension cable to PCIE card.
- Support expansion 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 card only needs to be inserted into the?24P power supply, graphics card power is provided by other power supply.? Power supply must be 500W and above.
- This series of boxes does not support built-in power supply and limits the size of the graphics card. (Not include the O culink extension cord)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CRR7HMX5 |
| Additional Features | Unique Start/Stop Functionality |
| Best Sellers Rank | #83,403 in Computers ( See Top 100 in Computers ) #725 in Graphics Cards |
| Brand | JMT |
| Compatible Devices | Desktop, Laptops |
| Compatible Phone Models | Universal |
| Compatible devices | Desktop, Laptops |
| Compatible phone models | Universal |
| Customer Reviews | 4.3 out of 5 stars 45 Reviews |
| Enclosure Material | Plastic Metal |
| Global Trade Identification Number | 00783798005388 |
| Item Weight | 0.32 Kilograms |
| Manufacturer | JMT |
| Material | Plastic Metal |
| Model Name | AMD Radeon RX 6800 XT |
| Model Number | F51620 |
| Mounting Type | Tabletop Mount |
| Mounting type | Tabletop Mount |
| Special features | Unique Start/Stop Functionality |
| UPC | 783798005388 078379800538 |

## Product Details

- **Brand:** JMT
- **Compatible devices:** Desktop, Laptops
- **Compatible phone models:** Universal
- **Mounting type:** Tabletop Mount
- **Special features:** Unique Start/Stop Functionality

## Images

![Support External Graphics Card M.2 M-Key to PCIE 4.0X4, Compatible with Oculink/M.2 NVMe Laptop eGPU?GDP Handheld (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.

### ⭐⭐⭐⭐⭐ 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

### ⭐⭐⭐⭐⭐ It is actually far better than expected
*by G***K on 16 November 2025*

Replaced a PCI-e 3.0 dock with this one to be able to run an RTX 3060 Ti. The other dock had a very cheap plastic main plate and only some extended screws for support. This one has far better build quality and is much more stable. The magnetic legs add the cherry on top. Put some metal plate underneath and it will stick there like being glued to the ground. The 3060 runs without issues reaching benchmark scores comparable or superior to desktop builds. The cabling of the 3.0 dock caused some WiFi intereference which yielded poor results (20-50Mbs on a 250Mbs WiFi card), the oculink cable doesn't cause anything like that. The only thing that I could mention as negative that the oculink cable's plastic cover is quite big and to be able to put it the backplate of the laptop back properly I had to remove it.

## 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 Morocco*
*Store origin: MA*
*Last updated: 2026-02-27*