--- product_id: 224525297 title: "OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution" brand: "owc" price: "£8.43" currency: GBP in_stock: false reviews_count: 13 url: https://www.desertcart.co.uk/products/224525297-owc-mercury-helios-3s-thunderbolt-3-pcie-expansion-solution store_origin: GB region: United Kingdom --- # 40Gbps Thunderbolt 3 speed Tool-free PCIe card installation Supports up to 8K DisplayPort 1.4 OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution **Brand:** owc **Price:** £8.43 **Availability:** ❌ Out of Stock ## Summary > ⚡ Expand your power, speed, and creativity—no limits, just possibilities. ## Quick Answers - **What is this?** OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution by owc - **How much does it cost?** £8.43 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/224525297-owc-mercury-helios-3s-thunderbolt-3-pcie-expansion-solution) ## Best For - owc enthusiasts ## Why This Product - Trusted owc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power Through Your Day:** 85W notebook charging keeps your laptop powered while you create. - • **8K-Ready DisplayPort 1.4 Output:** Connect stunning 8K displays and elevate your visual workspace. - • **Effortless Tool-Free Card Swaps:** Change or upgrade your PCIe cards in seconds—no tools, no hassle. - • **Versatile PCIe Card Compatibility:** Supports half-length, full-height, double-width pro cards for ultimate flexibility. - • **Blazing 40Gbps Thunderbolt 3 Transfer:** Experience ultra-fast data flow that keeps your workflow lightning quick. ## Overview The OWC Mercury Helios 3S is a premium Thunderbolt 3 PCIe expansion solution delivering 40Gbps transfer speeds, tool-free installation, and support for professional-grade PCIe cards including video, audio, storage, and networking. It features dual Thunderbolt 3 ports, DisplayPort 1.4 for 8K displays, and 85W charging, making it the ultimate dock for creative pros and managers seeking flexible, high-performance external PCIe expansion. ## Description Using a video, audio, storage, network, or even gaming PCIe card with a Mac Pro or PC desktop is a simple matter of inserting your card into an open slot. But what do you do if you have a laptop or even a space-confined desktop like an iMac or Mac mini that doesn't contain a PCIe slot? The OWC Mercury Helios 3S is an easy to use yet powerful expansion solution that adds an external PCIe slot to your Thunderbolt 3 equipped computer. Now you can maximize your existing PCIe card investment — or expand it! — while enjoying the flexibility of adding professional-class video production, transcoding, audio processing, data storage, and high-speed network connectivity to your machine. Instead of buying one or more function-dedicated Thunderbolt interface devices, you can use Mercury Helios 3S like a dock for multiple PCIe cards. Capture incredibly high-quality audio with a PCIe audio card and then retask Helios 3S with a PCIe SSD card to edit and archive tracks. You can swap cards in minutes, adding a new level of flexibility to your workflow. Mercury Helios 3S supports a wide variety of half-length, full-height, single or double-width pro-level PCIe cards from leading brands like AJA, Apogee, ATTO, Avid Pro Tools, Blackmagic Design, CalDigit, HighPoint, Intel, Solid State Logic, Universal Audio, and OWC: Video capture Digital audio Solid State Drive (SSD) 40GbE/10GbE network adapters SAS controllers Firewire, USB, or eSATA host adapters ## Features - LIGHTNING-FAST 40GBPS TRANSFER SPEEDS: (2) Thunderbolt 3 ports - PLAY YOUR CARD: physical slot and enclosure support cards up to half-length, full-height, double-width - SEE MORE: DisplayPort 1.4 for connecting up to an 8K display - EASY CARD INSTALLS: No tools required - CHARGE WHILE WORKING: 85W of notebook charging ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B083V3DKCN | | Additional Features | Play, Plug | | Best Sellers Rank | #108,544 in Electronics ( See Top 100 in Electronics ) #35 in Computer Networking Hubs | | Brand | OWC | | Color | Enclosure | | Compatible Devices | Desktops, Laptops | | Customer Reviews | 4.5 out of 5 stars 73 Reviews | | Data Transfer Rate | 40 Gigabits Per Second | | Enclosure Material | Aluminum | | Hardware Interface | Thunderbolt | | Item Dimensions L x W x H | 9.2"L x 5.6"W x 3.2"H | | Item Weight | 1.7 Kilograms | | Manufacturer | Other World Computing | | Mfr Part Number | HELIOS3S | | Model Number | OWCHELIOS3S | | Number of Ports | 3 | | Operating System | Windows, macOS | | Special Feature | Play, Plug | | Total USB Ports | 2 | | Total Usb Ports | 2 | | UPC | 810586032773 | ## Product Details - **Brand:** OWC - **Color:** Enclosure - **Compatible Devices:** Desktops, Laptops - **Hardware Interface:** Thunderbolt - **Special Feature:** Play, Plug ## Images ![OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution - Image 1](https://m.media-amazon.com/images/I/51qnp1z4rRL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution - Image 2](https://m.media-amazon.com/images/I/51AfhOiURRL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution - Image 3](https://m.media-amazon.com/images/I/61W4MVAfDOL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution - Image 4](https://m.media-amazon.com/images/I/41I3bgq2EcL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution - Image 5](https://m.media-amazon.com/images/I/41JKwlETjfL.jpg) ## Questions & Answers **Q: Does it support daisy chaining another Thunderbolt 3 device to the 2nd port? e.g. A 10gbe Thunderbolt network adapter.** A: Hello. Yes, the OWC Mercury Helios 3S will allow or thunderbolt device to be daisy-chained off the second port of this chassis. **Q: Can you install a gpu card like nvidia into this?** A: Hello. No this unit does not support GPU's. **Q: is this thunderbolt 4 compatible?** A: Hello. This Mercury Helios 3S is a Thunderbolt 3 device, but can be used in a Thunderbolt 4 port as 3 is backwards compatible. **Q: Will this work with bootcamp windows 10/11 for a lynx aes16e interface card?** A: I bought this for my vive wireless pcie wigic card and just googled yours. From what I see so long as you have a thunderbolt 3 port it should work.vyour card should fit. However from the looks of the googled image you may have to keep the casing off. No loss it will still work just no shell. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by H***S on August 28, 2025* ### ⭐⭐⭐⭐⭐ Review *by K***D on January 25, 2024* ### ⭐⭐⭐⭐⭐ Review *by T***H on January 29, 2024* ## Frequently Bought Together - OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution - Cable Matters [Intel Certified] 40Gbps Thunderbolt 4 Cable 3.3ft with 8K Video and 240W Charging - 1m, Compatible with USB4, Thunderbolt 3 Cable and USB-C --- ## 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.co.uk/products/224525297-owc-mercury-helios-3s-thunderbolt-3-pcie-expansion-solution](https://www.desertcart.co.uk/products/224525297-owc-mercury-helios-3s-thunderbolt-3-pcie-expansion-solution) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-19*