--- product_id: 268720688 title: "OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution" brand: "owc" price: "R12564" currency: ZAR in_stock: true reviews_count: 6 category: "Owc" url: https://www.desertcart.co.za/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot store_origin: ZA region: South Africa --- # 40Gb/s Thunderbolt 3 speed 85W notebook charging power Daisy-chain up to 5 devices OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution **Brand:** owc **Price:** R12564 **Availability:** ✅ In Stock ## Summary > ⚡ Unlock Thunderbolt Power & Expand Like a Pro! ## Quick Answers - **What is this?** OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution by owc - **How much does it cost?** R12564 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot) ## 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 charging keeps your laptop powered while you work—no compromises. - • **Secure & Reliable Build:** Locking 12V power connector ensures a stable, worry-free connection during intense sessions. - • **8K Display Ready with DisplayPort 1.4:** Drive stunning visuals on up to an 8K monitor for crystal-clear clarity. - • **Blazing 40Gb/s Thunderbolt 3 Transfer:** Experience ultra-fast data flow that keeps your workflow lightning quick. - • **Expand Your Setup with Daisy-Chain Magic:** Connect up to 5 additional Thunderbolt devices seamlessly for ultimate productivity. ## Overview The OWC Mercury Helios 3S is a premium Thunderbolt 3 PCIe expansion card enclosure delivering blazing 40Gb/s transfer speeds, dual Thunderbolt USB-C ports, and 85W laptop charging. It supports daisy-chaining up to 5 devices and 8K DisplayPort output, making it the ultimate external PCIe solution for Mac and Windows pros seeking powerful, flexible, and secure workflow expansion. ## Description Mercury Helios 3S The powerful expansion solution that adds an external PCIe slot to your Thunderbolt 3 equipped laptop, space-constrained Mac, or Windows PC desktop. Review: Works with Avid HD Native pie cards (OS X) - Bought to use with an iMac Pro to house an Avid HD Native card, it has worked flawlessly from day one even though it's not on Avid's supported list. Not single complaint and very well built, even supplies data to two external monitors with a single hiccup. Review: très bon matériel - Reçu rapidement et fonctionne très bien. Ne chauffe pas et prise en charge de la carte vidéo sans problème. Raccordé sur un mini ordinateur sur sa prise thunderbolt 4, tout fonctionne parfaitement. ## Features - Lightning-fast 40Gb/s transfer speeds: (2) Thunderbolt (USB-C) ports - See more: DisplayPort 1.4 for connecting up to an 8K display - Charge while working: 85W of notebook charging - Secure workflow: locking 12V power connector - Maximum potential: daisy-chain up to 5 additional Thunderbolt devices ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B083V3DKCN | | Best Sellers Rank | 63,304 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 593 in Computer Cases | | Brand | OWC | | Brand Name | OWC | | Colour | Black | | Compatible Devices | Laptops, Personal Computer | | Compatible devices | Laptops, Personal Computer | | Country of Origin | Taiwan | | Customer Reviews | 4.5 out of 5 stars 74 Reviews | | Data Transfer Rate | 40 Gigabits Per Second | | Enclosure Material | Metal | | Hardware Interface | Thunderbolt | | Hardware interface | Thunderbolt | | Item Dimensions L x W x H | 14.3L x 14.3W x 8.2H centimetres | | Item Weight | 1.7 Kilograms | | Manufacturer | OWC | | Manufacturer Part Number | HELIOS3S | | Minimum Required Operating System Version | Mac OS 14 Sonoma, Windows 11 | | Model Number | OWCHELIOS3S | | Number of Ports | 3 | | Operating System | Windows, macOS | | Product Features | Play, Plug | | Product Warranty | 2 year manufacturer | | Special feature | Play, Plug | | Total USB Ports | 2 | | Total USB ports | 2 | | UPC | 810586032773 | ## Product Details - **Brand:** OWC - **Colour:** Enclosure - **Hardware interface:** Thunderbolt - **Special feature:** Play, Plug - **Compatible devices:** Laptops, Personal Computer ## Images ![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 1](https://m.media-amazon.com/images/I/51qnp1z4rRL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 2](https://m.media-amazon.com/images/I/51AfhOiURRL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 3](https://m.media-amazon.com/images/I/61W4MVAfDOL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 4](https://m.media-amazon.com/images/I/41I3bgq2EcL.jpg) ![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 5](https://m.media-amazon.com/images/I/41JKwlETjfL.jpg) ## Available Options This product comes in different **Size** options. ## 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 ### ⭐⭐⭐⭐⭐ Works with Avid HD Native pie cards (OS X) *by C***G on 5 November 2021* Bought to use with an iMac Pro to house an Avid HD Native card, it has worked flawlessly from day one even though it's not on Avid's supported list. Not single complaint and very well built, even supplies data to two external monitors with a single hiccup. ### ⭐⭐⭐⭐⭐ très bon matériel *by R***O on 13 December 2023* Reçu rapidement et fonctionne très bien. Ne chauffe pas et prise en charge de la carte vidéo sans problème. Raccordé sur un mini ordinateur sur sa prise thunderbolt 4, tout fonctionne parfaitement. ### ⭐⭐⭐⭐⭐ OWC Mercury Helios 3S *by K***K on 1 March 2023* Arrivato prima del tempo previsto si presenta ottimo qualitativamente ed esteticamente! ## 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.za/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot](https://www.desertcart.co.za/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-25*