Why are some Thunderbolt 3 cables 20Gbps and some 40Gbps? - StarTech.com IT Pro Community
<main> <article class="userContent"> <p>Although the Thunderbolt™ 3 standard is capable of data transfer speeds up to 40Gbps, not all TB3 cables can support this bandwidth. For example, some cables over a certain length are only capable of data transfer speeds up to 20Gbps. </p><div class="js-embed embedResponsive" data-embedjson="{"height":113,"width":200,"photoUrl":"https:\/\/i.ytimg.com\/vi\/PuBM2DBBr7E\/hqdefault.jpg","videoID":"PuBM2DBBr7E","showRelated":false,"start":0,"url":"https:\/\/www.youtube.com\/watch?v=PuBM2DBBr7E","embedType":"youtube","name":"Before You Buy - Thunderbolt 3 | StarTech.com","frameSrc":"https:\/\/www.youtube.com\/embed\/PuBM2DBBr7E?feature=oembed&autoplay=1"}"> <a href="/home/leaving?allowTrusted=1&target=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DPuBM2DBBr7E" rel="nofollow noreferrer ugc"> https://www.youtube.com/watch?v=PuBM2DBBr7E </a> </div><p><br></p><p>To confirm the capability of your Thunderbolt 3 cable, refer to the information provided by the manufacturer. StarTech.com lists the capabilities of the Thunderbolt 3 cables on the individual product pages.</p><p>There are two different Thunderbolt 3 cable symbols:</p><h3 data-id="20-gbps-thunderbolt-3-cable">20 Gbps Thunderbolt 3 Cable</h3><div class="embedExternal embedImage display-medium float-none"> <div class="embedExternal-content"> <a class="embedImage-link" href="/home/leaving?allowTrusted=1&target=https%3A%2F%2Fus.v-cdn.net%2F6035386%2Fuploads%2FA6NPSPUJOM3J%2F20-gbps.jpg" rel="nofollow noreferrer noopener ugc" target="_blank"> <img class="embedImage-img" src="https://us.v-cdn.net/6035386/uploads/A6NPSPUJOM3J/20-gbps.jpg" alt="20-Gbps.jpg" height="377" width="293" loading="lazy" data-display-size="medium" data-float="none"></img></a> </div> </div> <p><br></p><h3 data-id="40-gbps-thunderbolt-3-cable">40 Gbps Thunderbolt 3 Cable</h3><div class="embedExternal embedImage display-medium float-none"> <div class="embedExternal-content"> <a class="embedImage-link" href="/home/leaving?allowTrusted=1&target=https%3A%2F%2Fus.v-cdn.net%2F6035386%2Fuploads%2FC1IMI5U8RHVB%2F40-gbps.jpg" rel="nofollow noreferrer noopener ugc" target="_blank"> <img class="embedImage-img" src="https://us.v-cdn.net/6035386/uploads/C1IMI5U8RHVB/40-gbps.jpg" alt="40-Gbps.jpg" height="377" width="293" loading="lazy" data-display-size="medium" data-float="none"></img></a> </div> </div> <p><br></p> </article> </main>
