--- product_id: 521471932 title: "QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller" brand: "qfly" price: "¥21239" currency: JPY in_stock: true reviews_count: 5 category: "Q Fly" url: https://www.desertcart.jp/products/521471932-qfly-2-5g-dual-rj45-port-pci-e-network-card store_origin: JP region: Japan --- # 2.5 Gbps ultra-fast speed Dual RJ45 ports for versatile connectivity PCIe x1/x4/x8/x16 compatibility QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller **Brand:** qfly **Price:** ¥21239 **Availability:** ✅ In Stock ## Summary > 🚀 Upgrade your desktop’s network game with dual 2.5G ports — because speed waits for no one! ## Quick Answers - **What is this?** QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller by qfly - **How much does it cost?** ¥21239 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/521471932-qfly-2-5g-dual-rj45-port-pci-e-network-card) ## Best For - qfly enthusiasts ## Why This Product - Trusted qfly brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal PCIe Fit:** Fits any PCI Express slot (x1, x4, x8, x16) with included low-profile and full-height brackets, making it perfect for compact or full-sized builds. - • **Blazing 2.5G Speeds:** Experience lightning-fast data transfers at 2.5 times the speed of standard gigabit cards, perfect for seamless streaming and gaming. - • **Dual-Port Powerhouse:** Double your wired network options with two RJ45 ports, ideal for multitasking or backup connections on your desktop. - • **Plug & Play Simplicity:** Effortless installation with native Windows 10 support and easy driver downloads for other OS, so you’re up and running in no time. - • **Future-Proof Compatibility:** Supports 2.5Gbps, 1Gbps, and 100Mbps speeds across Windows and Linux, ensuring your network card stays relevant as your setup evolves. ## Overview The QFly 2.5G Dual RJ45 Port PCI-E Network Card, powered by the Realtek RTL8125B chipset, delivers ultra-fast 2.5 Gbps wired connectivity with dual Ethernet ports. Compatible with all PCI Express slots and major operating systems, it offers plug-and-play convenience and flexible installation options with both low-profile and full-height brackets. Ideal for professionals seeking reliable, high-speed network upgrades on desktop PCs. ## Description QFly Dual Port 2.5GBase-T Gigabit Ethernet Network Card, RJ45 LAN Network Adaper,PCI Express Ethernet Card(RTL8125b)Chipset, support 100/1000/2500 Mbps for Windows 11/10/8/7/ Linux OS with Low Profile Bracket. Review: Great Budget 2.5G Card – Works Well, With One Caveat - I picked up two of these QFly 2.5G dual-port PCIe cards and they’ve been phenomenal for the price. Easy install, solid performance on both Windows and Linux. The only hiccup was with PCI passthrough — the Realtek RTL8125B chipset doesn’t play nice with virtual machine passthrough. I had to fall back to a VirtIO setup for my router VM. Not ideal, but it works — and that’s on the chipset, not the card. Pros: Reliable 2.5G speeds Plug-and-play on most systems Great price Dual ports on a PCIe x1 slot — perfect for compact or low-slot systems Cons: Realtek chip has known passthrough issues in VM setups Verdict: 5 stars. Great card, just avoid it for passthrough-heavy virtualization. Review: Works with pfsense firewall - I wasn’t sure about this card but it showed up and the driver loads Traffic flows and it works well without any dropped packets What more can you ask for ## Features - 【High up to 2.5x-speed】 Realtek 8125B chip combined with the latest 2.5GBase-T Technology, delivers extreme speeds of up to 2.5 Gbps, 2.5x faster than typical Gigabit network card, Ultra-low latency guaranteeing smooth data transmissions for both internet access and local data transmissions. - 【Complete Compatibility】 Seamless backward compatibility for 2.5Gbps/1Gbps/100Mbps, Support Windows11/10/8.1/8/7 and Linux, no dirver needed on Windows10, easily download the driver in Realtek official website for other OS. - 【Dual Port 2.5G Network Card】 By inserting a PCIe network card into the PCI Express x1 slot, you can upgrade the host with one more RJ45 port. It's a perfect choice for a Desktop PC that is fewer network ports or network port failure to connect to the wired network. - 【Fits any PCI Express】 2.5G NIC card fits x1, x4, x8 or x16 socket; Additional 8cm Low-profile bracket provides the option for installation in small size HTPC case. NOTE: Only work with PCI-E slot, Not for PCI Slot. - 【Low-Profile and Full-Height Brackets】PCIE Ethernet card In addition to the standard bracket, a low-profile bracket is provided for mini tower computer cases. Customized options give you the flexibility to find a bracket that perfectly fits your board design. - 【Tips】If there are any issues with the low profile bracket that cannot be used or any other product related issues, please feel free to contact us and we are glad to serve you. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BN6CL81R | | Box Contents | standard bracket and low-profile-bracket Screws ,Screwdriver | | Brand | QFly | | Brand Name | QFly | | Compatible Devices | Desktop | | Compatible devices | Desktop | | Customer Reviews | 4.2 out of 5 stars 51 Reviews | | Hardware Interface | PCI Express x1, PCI Express x16, PCI Express x4, PCI Express x8 | | Hardware interface | PCI Express x1, PCI Express x16, PCI Express x4, PCI Express x8 | | Item Weight | 78.5 Grams | | Item weight | 78.5 Grams | | Manufacturer | PANSHI | | Model Number | QFly-25G-DualPort | | Number of items | 1 | | Operating System | Windows11/10/8.1/8/7 Linux | | Style | standard | | Style Name | standard | ## Product Details - **Brand:** QFly - **Compatible devices:** Desktop - **Hardware interface:** PCI Express x1, PCI Express x16, PCI Express x4, PCI Express x8 - **Item weight:** 78.5 Grams - **Style:** standard ## Images ![QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller - Image 1](https://m.media-amazon.com/images/I/612nCdf1w8L.jpg) ![QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller - Image 2](https://m.media-amazon.com/images/I/612ec5C8GxL.jpg) ![QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller - Image 3](https://m.media-amazon.com/images/I/61C-wFN3nBL.jpg) ![QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller - Image 4](https://m.media-amazon.com/images/I/61VKKrx1gBL.jpg) ![QFly 2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Controller - Image 5](https://m.media-amazon.com/images/I/711rQIBcj7L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Budget 2.5G Card – Works Well, With One Caveat *by A***R on 23 May 2025* I picked up two of these QFly 2.5G dual-port PCIe cards and they’ve been phenomenal for the price. Easy install, solid performance on both Windows and Linux. The only hiccup was with PCI passthrough — the Realtek RTL8125B chipset doesn’t play nice with virtual machine passthrough. I had to fall back to a VirtIO setup for my router VM. Not ideal, but it works — and that’s on the chipset, not the card. Pros: Reliable 2.5G speeds Plug-and-play on most systems Great price Dual ports on a PCIe x1 slot — perfect for compact or low-slot systems Cons: Realtek chip has known passthrough issues in VM setups Verdict: 5 stars. Great card, just avoid it for passthrough-heavy virtualization. ### ⭐⭐⭐⭐⭐ Works with pfsense firewall *by W***E on 21 December 2024* I wasn’t sure about this card but it showed up and the driver loads Traffic flows and it works well without any dropped packets What more can you ask for ### ⭐⭐⭐⭐⭐ Card works OK but low profile bracket is flawed *by T***K on 29 June 2023* Card itself works fine but ran into the same issue with the low profile mounting bracket that another reviewer experienced. It seems the dimensions of the low profile bracket are off to where you can't mount the card properly with it installed (card sits an angle in the PCIe slot). Can't speak on the regular bracket since I haven't used it. This card would've been perfect had it not been for the low profile bracket issue. If seller/manufacturer can get me a replacement low profile bracket that fits properly like they did for the other reviewer, I will provide an update. UPDATE (7/12/23): After leaving my initial review, the seller reached out and offered to send me a replacement low profile bracket. Got the bracket in the mail today and it fits perfect! Thank you! --- ## 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.jp/products/521471932-qfly-2-5g-dual-rj45-port-pci-e-network-card](https://www.desertcart.jp/products/521471932-qfly-2-5g-dual-rj45-port-pci-e-network-card) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-11*