--- product_id: 726517182 title: "JMT M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket for Oculink/M.2 NVMe Laptop eGPU? Supports GDP handheld (Dock-OC4)" brand: "jmt" price: "€ 107.78" currency: EUR in_stock: true reviews_count: 5 category: "Jmt" url: https://www.desertcart.sk/products/726517182-jmt-m-2-m-key-to-pcie-4-0x4-external store_origin: SK region: Slovakia --- # PCIe 4.0 x4 Gen4 bandwidth Oculink & M.2 NVMe laptop compatibility Supports ATX/SFX 1U power supply >500W JMT M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket for Oculink/M.2 NVMe Laptop eGPU? Supports GDP handheld (Dock-OC4) **Brand:** jmt **Price:** € 107.78 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your laptop’s graphics game—because your workflow deserves a power boost! ## Quick Answers - **What is this?** JMT M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket for Oculink/M.2 NVMe Laptop eGPU? Supports GDP handheld (Dock-OC4) by jmt - **How much does it cost?** € 107.78 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/726517182-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 - • **Power Up Without Limits:** Seamlessly power your GPU via standard 24P ATX/SFX power supplies over 500W—no bulky built-in PSU needed. - • **Universal Expansion Hub:** Supports GPUs, network, sound, and capture cards—turn your laptop into a powerhouse workstation. - • **Sleek, Compact, and Ready:** Minimalist tabletop mount design fits small form factors, perfect for on-the-go pros craving desktop-grade graphics. - • **Blazing PCIe 4.0 x4 Speeds:** Unlock ultra-fast data transfer with Gen4 bandwidth, future-proof your eGPU setup. - • **Plug & Play Sync Start/Stop:** Effortless integration with host devices featuring synchronous power control—just connect and go. ## Overview The JMT M.2 M-Key to PCIe 4.0 x4 External Graphics Card Stand Bracket is a cutting-edge adapter designed for laptops and handhelds with Oculink or M.2 NVMe ports. It enables high-speed PCIe 4.0 x4 connectivity to external GPUs and other PCIe cards, powered via standard ATX/SFX power supplies over 500W. Ideal for professionals seeking to dramatically enhance graphics performance without investing in a new PC, this compact, metal-and-plastic bracket supports synchronous start/stop with the host and a wide range of PCIe expansion cards, making it a versatile and cost-effective eGPU solution. ## Description JMT M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket for Oculink / M.2 NVMe Laptop eGPU GDP Handheld Description: 1. O culink adapter board, support devices with Oculink port to extend PCIE card. 2. Support M.2 port Connects to PCIE card via standard O culink extension cable 3. Support Extended GPU Graphics Card, PCIE Network Card, PCIE Sound Card, PCIE Capture Card, etc. PCIE array card only supports X4 devices. 4.Max bandwidth speed is PCIE 4.0 X4 GEN4, backwards 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 power of the graphics card is supplied from other power supplies. Power supply must be more than 500W. 6. Support synchronous start and stop following the host. Does not support hot swapping. 7. Only GDP handheld with o culink port has successfully tested compatibility. Other hosts with O culink port are still collected. 8. 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 does not include O culink extension cables. Please purchase separately. 10. This series box does not support built-in power supply. There are also some restrictions on the size of the graphic card. Review: All works ok Review: 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, supports devices with O-ring port to extend PCIE cards - Supports M.2 port to PCIE card via standard O culink extension cable - Support expansion GPU graphics card, PCIE network card, PCIE sound card, PCIE capture card and so on. PCIE array card only compatible with X4 devices - Compatible with ATXSFXsmall 1U Power Supply Simply insert the adapter board into the 24P power supply, and the graphics card power is supplied from other power sources. Power supply must be more than 500W - This series box does not support built-in power and limits the size of graphic cards. (O curink extension cable not included) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CRR7HMX5 | | Additional Features | Unique start/stop function | | Amazon Bestseller | #25,759 in Computers ( See Top 100 in Computers ) #77 in Computer Graphics Cards | | Brand | JMT | | Color | Black | | Compatible Devices | Laptops | | Country of Origin | China | | Customer Reviews | 4.3 4.3 out of 5 stars (52) | | Enclosure Material | Metal, Plastic | | Global Trade Identification Number | 00783798005388 | | Item Weight | 0.32 Kilograms | | Manufacturer | JMT | | Mfr Part Number | F51620 | | Model Name | AMD Radeon RX 6800 XT | | Model Number | F51620 | | Mounting Type | Tabletop Mount | | UPC | 783798005388 078379800538 | | Unit Count | 1.0 Count | | Warranty Description | 1 | ## Product Details - **Brand:** JMT - **Color:** Black - **Compatible Devices:** Laptops - **Mounting Type:** Tabletop Mount - **Special Feature:** Unique start/stop function ## Images ![JMT M.2 M-Key to PCIE 4.0X4 External Graphics Card Stand Bracket for Oculink/M.2 NVMe Laptop eGPU? Supports 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 ### ⭐⭐⭐⭐⭐ Review *by P***. on March 6, 2026* All works ok ### ⭐⭐⭐⭐⭐ Review *by T***6 on August 20, 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. ### ⭐⭐⭐⭐⭐ Review *by A***I on March 11, 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 - 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) - chenyang SFF-8611 Cable OCuLink PCIe PCI-Express 4.0 SFF-8611 4i Male to SFF-8611 Male Data Extension Cable 50cm for eGPU GPD Win Max2 External Graphics Card & SSD - CY Cable OcuLink PCIe PCI-Express SFF-8611 4i to OcuLink SFF-8611 SSD Data Active Cable 50cm --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/726517182-jmt-m-2-m-key-to-pcie-4-0x4-external](https://www.desertcart.sk/products/726517182-jmt-m-2-m-key-to-pcie-4-0x4-external) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-05-14*