---
product_id: 704727833
title: "JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA)"
brand: "jmt"
price: "$149.35"
currency: USD
in_stock: true
reviews_count: 6
category: "Jmt"
url: https://www.desertcart.us/products/704727833-jmt-pci-e-4-0-x16-1-to-2-expansion
store_origin: US
region: United States of America
---

# PCIe 4.0 x16 full bandwidth Power-on LED & CPU4P auxiliary power Supports x8/x8 bifurcation mode JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA)

**Brand:** jmt
**Price:** $149.35
**Availability:** ✅ In Stock

## Summary

> 🚀 Double your PCIe lanes, double your power — bifurcate like a pro!

## Quick Answers

- **What is this?** JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA) by jmt
- **How much does it cost?** $149.35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/704727833-jmt-pci-e-4-0-x16-1-to-2-expansion)

## 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

- • **Precision Engineering:** Gold finger with 5U thickness and dust-proof Gen4 connectors for durability and signal integrity.
- • **Robust Power Delivery:** CPU4P auxiliary power port ensures stable power supply beyond motherboard limits.
- • **Maximize GPU & HBA Potential:** Split a single PCIe 4.0 x16 slot into two x8 lanes for dual high-speed devices.
- • **Optimized Spacing & Expansion:** 20mm slot spacing supports large cards and PCIe extension cables for versatile setups.
- • **Seamless Gen3 & Gen4 Compatibility:** Works with both PCIe Gen3 and Gen4 protocols—future-proof your build with flexible performance.

## Overview

The JMT PCI-E 4.0 x16 1 to 2 Expansion Card enables bifurcation of a single PCIe x16 slot into two x8 slots, supporting PCIe Gen3 and Gen4 protocols under compatible BIOS settings. Featuring enhanced gold finger plating, dust-proof Gen4 connectors, power-on LED, and an auxiliary CPU4P power port, it ensures reliable high-speed data transfer and stable power delivery. Ideal for professionals building multi-GPU or multi-HBA systems requiring efficient lane splitting and optimal slot spacing.

## Description

JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen*3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port Features: 1, PCIE X16 full bandwidth 4. 0 , GEN*3 protocol, compatible with gen3\gen4(Specific circumstances are required to fully operate in GEN4 state). 2,Conditions of use: Motherboard BlO*S supports changing PCIE operating mode to X8X8. 2,Gold finger sinking process, increase gold thickness to 5U. 3,Adopt new generation GEN*4 connector with dust plug and snap. 4,With clock splitting IC. 5,With power on LED indicator. 6,With CPU4P auxiliary power supply port. 7, 2cm slot spacing. Supports PCIE extension cable adapter. Instructions for use：1.Have a motherboard with vifurcation, make sure the motherboard is in the support list of the product.2. Enter the motherboard BIOS and set for the PCIE slots to X8X8 mode.3. Make sure the adapter is installed into the slot that is set to X8X8, not another PCIE slot.Warm Tips:1. If the two graphics cards are not running, you can set the PCIE speed to GEN3 and try it.2. the device does not consume power, the motherboard provides a maximum of 75W to the PCIE, 75W if distributed to the two GPUs will result in insufficient power at the PCIE end, so additional supplementation is required, no matter how much supplementation you provide, it will only get what is needed.

Review: Gen3 card spliter.. - Stated 4.0 but read on from the title. As i think the lister of the item is trying to hit search results. This is for Gen3 and as such it will ever not work, like in my situation, or you will have slower speeds.
Review: efficace et très utile - J'ai une carte mATX pour construire mon DIY NAS. Je n'ai qu'un port PCIE x16 sur cette carte mère. - il y a un port X4 pour une carte intel 2 ports RJ45 10Gb/s - un port nvme transformé en port PCIE x4 pour une carte SFP+ 10Gb/s Pas besoin de carte graphique, donc j'aimerais utilisé ce port (16 lignes) pour autre chose. 1 carte HBA (4X4 ports SATA) pour les disques, c'est bien, mais c'est une carte x8 et n'est pas optimal pour du disque en miroir. 2 HBA seraient plus utiles, mais il faut 2 ports x8. Et ben voilà, cette carte est exactement fait pour ça : diviser x16 en x8 + x8. bien sûr, il faut activer la bifurcation dans le BIOS en fonction du résultat voulu : ici 2 fois x8. j'ai essayé le 4 fois X4, mais d'après mes lectures, certaine puces intel ne permettent que x8x4x4. Sur les photos, on voit (CPU watercoolé): - cable rizer pour brancher cette carte de bifurcation pcie - 2 carte HBA SAS sur cette carte de bifurcation - NAS boitier fermé à moins de 30° en vitesse de croisière.

## Features

- PCIE X16 full bandwidth 4. 0 , GEN*4 protocol, compatible with gen3 /gen4(Specific circumstances are required to fully operate in GEN4 state).
- Conditions of use: Motherboard BlO*S supports changing PCIE operating mode to X8X8.
- Gold finger sinking process, increase gold thickness to 5U.
- Adopt new generation GEN*4 connector with dust plug and snap. 2cm slot spacing. Supports PCIE extension cable adapter.
- With clock splitting IC. With power on LED indicator. With CPU4P auxiliary power supply port.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CVTNLL21 |
| Best Sellers Rank | 163,787 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 641 in Network Cards |
| Brand | JMT |
| Brand Name | JMT |
| Compatible Devices | Personal Computer, Laptop, Server |
| Compatible devices | Personal Computer, Laptop, Server |
| Customer Reviews | 3.7 out of 5 stars 26 Reviews |
| Hardware Interface | PCI Express 4.0 |
| Hardware interface | PCI Express 4.0 |
| Item Weight | 68 g |
| Item weight | 68 g |
| Manufacturer | JMT |
| Manufacturer Part Number | F47986 |
| Model Number | F47986 |
| Operating System | Windows, macOS, Linux |
| Style | Modern |
| Style Name | Modern |
| UPC | 783798004916 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** JMT
- **Compatible devices:** Personal Computer, Laptop, Server
- **Hardware interface:** PCI Express 4.0
- **Item weight:** 68 g
- **Style:** Modern

## Images

![JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA) - Image 1](https://m.media-amazon.com/images/I/61JLA1bHI1L.jpg)
![JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA) - Image 2](https://m.media-amazon.com/images/I/5140DcEyMGL.jpg)
![JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA) - Image 3](https://m.media-amazon.com/images/I/61QOR8KnugL.jpg)
![JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA) - Image 4](https://m.media-amazon.com/images/I/51eusi2mXKL.jpg)
![JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA) - Image 5](https://m.media-amazon.com/images/I/51w0FRU-JPL.jpg)

## Available Options

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

## Customer Reviews

### ⭐ Gen3 card spliter..
*by M***G on 15 April 2025*

Stated 4.0 but read on from the title. As i think the lister of the item is trying to hit search results. This is for Gen3 and as such it will ever not work, like in my situation, or you will have slower speeds.

### ⭐⭐⭐⭐⭐ efficace et très utile
*by N***N on 22 May 2024*

J'ai une carte mATX pour construire mon DIY NAS. Je n'ai qu'un port PCIE x16 sur cette carte mère. - il y a un port X4 pour une carte intel 2 ports RJ45 10Gb/s - un port nvme transformé en port PCIE x4 pour une carte SFP+ 10Gb/s Pas besoin de carte graphique, donc j'aimerais utilisé ce port (16 lignes) pour autre chose. 1 carte HBA (4X4 ports SATA) pour les disques, c'est bien, mais c'est une carte x8 et n'est pas optimal pour du disque en miroir. 2 HBA seraient plus utiles, mais il faut 2 ports x8. Et ben voilà, cette carte est exactement fait pour ça : diviser x16 en x8 + x8. bien sûr, il faut activer la bifurcation dans le BIOS en fonction du résultat voulu : ici 2 fois x8. j'ai essayé le 4 fois X4, mais d'après mes lectures, certaine puces intel ne permettent que x8x4x4. Sur les photos, on voit (CPU watercoolé): - cable rizer pour brancher cette carte de bifurcation pcie - 2 carte HBA SAS sur cette carte de bifurcation - NAS boitier fermé à moins de 30° en vitesse de croisière.

### ⭐⭐⭐⭐⭐ Works great in an ITX case with cramped quarters!
*by K***R on 8 September 2024*

With the addition of a x16 riser, this works great with my Z490 Phantom Gaming-ITX/TB3 motherboard. My ITX case (Nanoxia Project S Mini) came without a riser and to make matters worse, the pcie slots are oriented backwards (card end connector away from motherboard). This bifurication card allowed me to securely mount a single slot Nvidia Quadro card and a four port Elgato capture card. Initially I used a riser cable from another brand as it was the only one I could find that would tolerate a complete 180 turn and still fit without unsafe bending. I had issues with the PC locking up using that setup. Switching to the "JMT PCIE 4.0 X16 Extension Cable...", although pricey, fixed the crashing issues. I definitely recommend keeping the whole chain JMT brand, even if its going to cost you a bit more.

## Frequently Bought Together

- JMT PCI-E 4.0 x16 1 to 2 Expansion Card Gen3 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port (SATA)
- Crucial 96GB DDR5 RAM, 5600MHz (or 5200MHz or 4800MHz) Laptop Memory Kit, SODIMM 262-Pin, Compatible with 13th Gen Intel Core and AMD Ryzen 6000 - CT2K48G56C46S5
- EZDIY-FAB Vertical GPU Mount with High-Speed PCIE 4.0 Riser Cable, Shield Series, 115mm/4.52in Flexible Extension, 90 Degree Connector, Only Compatible to Full-Opened PCIe Slots-Black-YIHPI344

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-21*