{"id":3548,"date":"2025-12-29T17:11:09","date_gmt":"2025-12-29T09:11:09","guid":{"rendered":"https:\/\/oretonstorage.com\/?p=3548"},"modified":"2025-12-29T17:11:09","modified_gmt":"2025-12-29T09:11:09","slug":"limites-des-interfaces-ssd-externes-usb-thunderbolt","status":"publish","type":"post","link":"https:\/\/oretonstorage.com\/fr\/blog\/limites-des-interfaces-ssd-externes-usb-thunderbolt","title":{"rendered":"Les vitesses des disques SSD externes ne sont pas ce qu'elles semblent \u00eatre : Les limites de l'USB et du Thunderbolt expliqu\u00e9es"},"content":{"rendered":"<p data-start=\"193\" data-end=\"480\">Les SSD externes sont d\u00e9sormais une solution tr\u00e8s pris\u00e9e pour augmenter la capacit\u00e9 de stockage, effectuer des sauvegardes rapides et g\u00e9rer des flux de donn\u00e9es en toute mobilit\u00e9. Pourtant, de nombreux utilisateurs \u2014 m\u00eame ceux qui s'y connaissent en informatique \u2014 sont surpris lorsqu'un SSD n'atteint pas les vitesses annonc\u00e9es. Souvent, ce n'est pas le disque lui-m\u00eame qui est en cause, mais le <strong data-start=\"456\" data-end=\"479\">l'interface qui se cache derri\u00e8re<\/strong>.<\/p>\n<hr data-start=\"482\" data-end=\"485\" \/>\n<h2 data-start=\"487\" data-end=\"521\">1. Comprendre les interfaces<\/h2>\n<p data-start=\"523\" data-end=\"550\"><strong data-start=\"523\" data-end=\"548\">USB 3.2 Gen 1 (5 Gbit\/s)<\/strong><\/p>\n<ul data-start=\"551\" data-end=\"690\">\n<li data-start=\"551\" data-end=\"595\">\n<p data-start=\"553\" data-end=\"595\">Bande passante th\u00e9orique maximale : environ 625 Mo\/s<\/p>\n<\/li>\n<li data-start=\"596\" data-end=\"631\">\n<p data-start=\"598\" data-end=\"631\">Vitesses r\u00e9elles : 450 \u00e0 500 Mo\/s<\/p>\n<\/li>\n<li data-start=\"632\" data-end=\"690\">\n<p data-start=\"634\" data-end=\"690\">Id\u00e9al pour le stockage g\u00e9n\u00e9ral, les sauvegardes et les anciens ordinateurs portables<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"692\" data-end=\"720\"><strong data-start=\"692\" data-end=\"718\">USB 3.2 Gen 2 (10 Gbit\/s)<\/strong><\/p>\n<ul data-start=\"721\" data-end=\"885\">\n<li data-start=\"721\" data-end=\"767\">\n<p data-start=\"723\" data-end=\"767\">Bande passante th\u00e9orique maximale : environ 1 250 Mo\/s<\/p>\n<\/li>\n<li data-start=\"768\" data-end=\"805\">\n<p data-start=\"770\" data-end=\"805\">Vitesses r\u00e9elles : 900 \u00e0 1 100 Mo\/s<\/p>\n<\/li>\n<li data-start=\"806\" data-end=\"885\">\n<p data-start=\"808\" data-end=\"885\">Convient aux cr\u00e9ateurs de contenu travaillant avec des fichiers de taille moyenne ; transfert plus rapide que la Gen1<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"887\" data-end=\"917\"><strong data-start=\"887\" data-end=\"915\">USB 3.2 Gen 2x2 (20 Gbit\/s)<\/strong><\/p>\n<ul data-start=\"918\" data-end=\"1093\">\n<li data-start=\"918\" data-end=\"964\">\n<p data-start=\"920\" data-end=\"964\">Bande passante th\u00e9orique maximale : environ 2 500 Mo\/s<\/p>\n<\/li>\n<li data-start=\"965\" data-end=\"1004\">\n<p data-start=\"967\" data-end=\"1004\">Vitesses r\u00e9elles : 2 000 \u00e0 2 300 Mo\/s<\/p>\n<\/li>\n<li data-start=\"1005\" data-end=\"1093\">\n<p data-start=\"1007\" data-end=\"1093\">Prise en charge limit\u00e9e sur les ordinateurs portables ; souvent r\u00e9serv\u00e9e aux cartes m\u00e8res d'ordinateurs de bureau ou aux adaptateurs Thunderbolt<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1095\" data-end=\"1135\"><strong data-start=\"1095\" data-end=\"1133\">Thunderbolt 3 \/ 4 \/ USB4 (40 Gbit\/s)<\/strong><\/p>\n<ul data-start=\"1136\" data-end=\"1343\">\n<li data-start=\"1136\" data-end=\"1182\">\n<p data-start=\"1138\" data-end=\"1182\">Bande passante th\u00e9orique maximale : 5 000 Mo\/s+<\/p>\n<\/li>\n<li data-start=\"1183\" data-end=\"1245\">\n<p data-start=\"1185\" data-end=\"1245\">Vitesses r\u00e9elles : entre 2 500 et 3 500 Mo\/s pour la plupart des SSD portables<\/p>\n<\/li>\n<li data-start=\"1246\" data-end=\"1343\">\n<p data-start=\"1248\" data-end=\"1343\">Id\u00e9al pour les flux de travail vid\u00e9o 4K\/8K, les ressources de projets volumineux et les applications professionnelles \u00e0 haute vitesse<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1345\" data-end=\"1348\" \/>\n<h2 data-start=\"1350\" data-end=\"1393\">2. Pourquoi un m\u00eame SSD peut pr\u00e9senter des performances diff\u00e9rentes<\/h2>\n<p data-start=\"1395\" data-end=\"1590\">Un SSD externe NVMe haut de gamme peut \u00eatre propos\u00e9 au prix de <strong data-start=\"1445\" data-end=\"1465\">3 000 \u00e0 4 000 Mo\/s<\/strong>, mais le brancher sur un port USB Gen2 limite le d\u00e9bit de transfert \u00e0 <strong data-start=\"1530\" data-end=\"1545\">~1 000 Mo\/s<\/strong>. Parmi les facteurs qui influencent les performances, on peut citer :<\/p>\n<ul data-start=\"1592\" data-end=\"1847\">\n<li data-start=\"1592\" data-end=\"1672\">\n<p data-start=\"1594\" data-end=\"1672\"><strong data-start=\"1594\" data-end=\"1628\">Compatibilit\u00e9 avec les contr\u00f4leurs h\u00f4tes :<\/strong> Prise en charge des ports USB\/Thunderbolt sur les ordinateurs portables ou de bureau<\/p>\n<\/li>\n<li data-start=\"1673\" data-end=\"1753\">\n<p data-start=\"1675\" data-end=\"1753\"><strong data-start=\"1675\" data-end=\"1693\">Qualit\u00e9 du c\u00e2ble :<\/strong> Des c\u00e2bles Thunderbolt certifi\u00e9s sont indispensables pour b\u00e9n\u00e9ficier d'une vitesse maximale<\/p>\n<\/li>\n<li data-start=\"1754\" data-end=\"1847\">\n<p data-start=\"1756\" data-end=\"1847\"><strong data-start=\"1756\" data-end=\"1781\">Contr\u00f4leur de bo\u00eetier :<\/strong> Certains bo\u00eetiers pour SSD limitent les performances pour des raisons de dissipation thermique ou d'efficacit\u00e9 \u00e9nerg\u00e9tique<\/p>\n<\/li>\n<\/ul>\n<blockquote data-start=\"1849\" data-end=\"1992\">\n<p data-start=\"1851\" data-end=\"1992\">Exemple : un SSD NVMe de 2 To install\u00e9 dans un bo\u00eetier Thunderbolt 3 a atteint <strong data-start=\"1913\" data-end=\"1927\">3 200 Mo\/s<\/strong> sur un ordinateur portable compatible, mais uniquement <strong data-start=\"1961\" data-end=\"1973\">950 Mo\/s<\/strong> via USB 3.2 Gen2.<\/p>\n<\/blockquote>\n<hr data-start=\"1994\" data-end=\"1997\" \/>\n<h2 data-start=\"1999\" data-end=\"2051\">3. Choisir l'interface adapt\u00e9e \u00e0 votre flux de travail<\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" style=\"height: 156px\" width=\"975\" data-start=\"2053\" data-end=\"2429\">\n<thead data-start=\"2053\" data-end=\"2097\">\n<tr data-start=\"2053\" data-end=\"2097\">\n<th data-start=\"2053\" data-end=\"2064\" data-col-size=\"md\">Cas d'utilisation<\/th>\n<th data-start=\"2064\" data-end=\"2088\" data-col-size=\"sm\">Interface recommand\u00e9e<\/th>\n<th data-start=\"2088\" data-end=\"2097\" data-col-size=\"md\">Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2140\" data-end=\"2429\">\n<tr data-start=\"2140\" data-end=\"2212\">\n<td data-start=\"2140\" data-end=\"2168\" data-col-size=\"md\">Rangement au bureau \/ au quotidien<\/td>\n<td data-start=\"2168\" data-end=\"2183\" data-col-size=\"sm\">USB 3.2 Gen 1<\/td>\n<td data-start=\"2183\" data-end=\"2212\" data-col-size=\"md\">Stable, largement compatible<\/td>\n<\/tr>\n<tr data-start=\"2213\" data-end=\"2321\">\n<td data-start=\"2213\" data-end=\"2245\" data-col-size=\"md\">Monteurs vid\u00e9o \/ photographes<\/td>\n<td data-start=\"2245\" data-end=\"2269\" data-col-size=\"sm\">USB 3.2 Gen 2 \/ Gen 2x2<\/td>\n<td data-start=\"2269\" data-end=\"2321\" data-col-size=\"md\">Acc\u00e9l\u00e8re le transfert de projets, v\u00e9rifie la compatibilit\u00e9 des ordinateurs portables<\/td>\n<\/tr>\n<tr data-start=\"2322\" data-end=\"2429\">\n<td data-start=\"2322\" data-end=\"2373\" data-col-size=\"md\">Contenu 4K\/8K professionnel, flux de travail d'entreprise<\/td>\n<td data-start=\"2373\" data-end=\"2398\" data-col-size=\"sm\">Thunderbolt 3\/4 \/ USB4<\/td>\n<td data-start=\"2398\" data-end=\"2429\" data-col-size=\"md\">Tirer pleinement parti du potentiel des SSD NVMe<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"2431\" data-end=\"2474\"><strong data-start=\"2431\" data-end=\"2472\">Consignes \u00e0 l'intention des acheteurs OEM ou des distributeurs :<\/strong><\/p>\n<ol data-start=\"2475\" data-end=\"2733\">\n<li data-start=\"2475\" data-end=\"2549\">\n<p data-start=\"2478\" data-end=\"2549\">V\u00e9rifiez le <strong data-start=\"2488\" data-end=\"2521\">prise en charge de l'interface du syst\u00e8me h\u00f4te<\/strong> avant de recommander des SSD.<\/p>\n<\/li>\n<li data-start=\"2550\" data-end=\"2626\">\n<p data-start=\"2553\" data-end=\"2626\">Adaptez la vitesse du SSD \u00e0 celle du <strong data-start=\"2580\" data-end=\"2597\">type de charge de travail<\/strong>, et pas seulement les Mo\/s annonc\u00e9s.<\/p>\n<\/li>\n<li data-start=\"2627\" data-end=\"2733\">\n<p data-start=\"2630\" data-end=\"2733\">R\u00e9fl\u00e9chissez \u00e0 ceci <strong data-start=\"2639\" data-end=\"2658\">adaptation aux \u00e9volutions futures<\/strong>: La prise en charge de Thunderbolt ou de l'USB 4 est de plus en plus courante sur les ordinateurs portables haut de gamme.<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"2735\" data-end=\"2738\" \/>\n<h2 data-start=\"2740\" data-end=\"2759\">4. Points cl\u00e9s \u00e0 retenir<\/h2>\n<ul data-start=\"2761\" data-end=\"3088\">\n<li data-start=\"2761\" data-end=\"2852\">\n<p data-start=\"2763\" data-end=\"2852\">La vitesse d'un SSD externe est de <strong data-start=\"2785\" data-end=\"2806\">limit\u00e9 par l'interface<\/strong>: le SSD \u00e0 lui seul ne d\u00e9termine pas les performances.<\/p>\n<\/li>\n<li data-start=\"2853\" data-end=\"2950\">\n<p data-start=\"2855\" data-end=\"2950\">Les normes USB Gen1\/2, Gen2x2, Thunderbolt 3\/4 et USB4 offrent des bandes passantes r\u00e9elles tr\u00e8s diff\u00e9rentes.<\/p>\n<\/li>\n<li data-start=\"2951\" data-end=\"3088\">\n<p data-start=\"2953\" data-end=\"3088\">Pour les \u00e9quipementiers ou les revendeurs, le fait d'assortir le SSD et l'interface garantit la satisfaction des clients et \u00e9vite les r\u00e9clamations concernant des \u201c disques peu performants \u201d.\u201d<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3090\" data-end=\"3433\">Au <strong data-start=\"3093\" data-end=\"3103\">Oreton<\/strong>, nous proposons <strong data-start=\"3116\" data-end=\"3142\">solutions SSD externes<\/strong> Con\u00e7us pour garantir la coh\u00e9rence, avec des bo\u00eetiers et des interfaces test\u00e9s qui offrent les vitesses annonc\u00e9es. Nos partenaires B2B peuvent d\u00e9ployer en toute confiance des solutions de stockage portables pour la cr\u00e9ation de contenu, les sauvegardes d'entreprise et les flux de travail \u00e0 haut d\u00e9bit, en sachant que les performances seront fiables sur l'ensemble des syst\u00e8mes pris en charge.<\/p>","protected":false},"excerpt":{"rendered":"<p>Les disques SSD externes sont devenus une solution populaire pour l'extension du stockage, les sauvegardes rapides et les flux de donn\u00e9es portables. Pourtant, de nombreux utilisateurs - et m\u00eame des acheteurs techniques - sont surpris de constater qu'un disque SSD n'atteint pas les vitesses annonc\u00e9es. Le coupable n'est souvent pas le disque lui-m\u00eame, mais l'interface qui le sous-tend. 1. Comprendre les interfaces USB 3.2 Gen1 (5 Gbps)...<\/p>","protected":false},"author":3,"featured_media":3495,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3548","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>External SSD Speeds Aren\u2019t What They Seem: USB vs Thunderbolt Limitations Explained -<\/title>\n<meta name=\"description\" content=\"External SSD speeds often fall short of advertised numbers due to USB and Thunderbolt interface limitations. Learn how Gen1\/2\/2x2 and Thunderbolt 3\/4\/USB4 impact real-world performance and how to choose the right solution for OEM and enterprise workflows.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/oretonstorage.com\/fr\/blog\/limites-des-interfaces-ssd-externes-usb-thunderbolt\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"External SSD Speeds Aren\u2019t What They Seem: USB vs Thunderbolt Limitations Explained -\" \/>\n<meta property=\"og:description\" content=\"External SSD speeds often fall short of advertised numbers due to USB and Thunderbolt interface limitations. Learn how Gen1\/2\/2x2 and Thunderbolt 3\/4\/USB4 impact real-world performance and how to choose the right solution for OEM and enterprise workflows.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/oretonstorage.com\/fr\/blog\/limites-des-interfaces-ssd-externes-usb-thunderbolt\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-29T09:11:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/oretonstorage.com\/wp-content\/uploads\/2025\/12\/2025.09.15-773x1030.png\" \/>\n\t<meta property=\"og:image:width\" content=\"773\" \/>\n\t<meta property=\"og:image:height\" content=\"1030\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Echo\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Echo\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt\"},\"author\":{\"name\":\"Echo\",\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/#\\\/schema\\\/person\\\/691da96ccdd2a899702e96be4c0b892e\"},\"headline\":\"External SSD Speeds Aren\u2019t What They Seem: USB vs Thunderbolt Limitations Explained\",\"datePublished\":\"2025-12-29T09:11:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt\"},\"wordCount\":422,\"image\":{\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/oretonstorage.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/2025.09.15-scaled.png\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt\",\"url\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt\",\"name\":\"External SSD Speeds Aren\u2019t What They Seem: USB vs Thunderbolt Limitations Explained -\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/blog\\\/external-ssd-interface-limitations-usb-thunderbolt#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/oretonstorage.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/2025.09.15-scaled.png\",\"datePublished\":\"2025-12-29T09:11:09+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/oretonstorage.com\\\/#\\\/schema\\\/person\\\/691da96ccdd2a899702e96be4c0b892e\"},\"description\":\"External SSD speeds often fall short of advertised numbers due to USB and Thunderbolt interface limitations. 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