{"id":1229,"date":"2025-10-06T16:08:39","date_gmt":"2025-10-06T14:08:39","guid":{"rendered":"https:\/\/computershop.eu\/blog\/?p=1221"},"modified":"2025-10-06T16:34:17","modified_gmt":"2025-10-06T14:34:17","slug":"comment-choisir-le-bloc-dalimentation-pour-votre-pc","status":"publish","type":"post","link":"https:\/\/computershop.eu\/blog\/fr\/comment-choisir-le-bloc-dalimentation-pour-votre-pc","title":{"rendered":"Comment choisir le bloc d&#8217;alimentation pour votre PC"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<h3 class=\"wp-block-heading\"><strong>Pourquoi le bloc d&#8217;alimentation (PSU) est essentiel aux performances du PC<\/strong> <\/h3>\n\n\n\n<p> Lors de l&#8217;assemblage ou de l&#8217;achat d&#8217;un ordinateur, on accorde souvent une grande importance au processeur, \u00e0 la carte graphique ou \u00e0 la m\u00e9moire vive. Cependant, le bloc d&#8217;alimentation (PSU) est l&#8217;un des composants les plus importants du syst\u00e8me. Il alimente tous les composants et influence directement la stabilit\u00e9 et la dur\u00e9e de vie du PC. <\/p>\n\n\n\n<p> Choisir une alimentation inadapt\u00e9e ou de mauvaise qualit\u00e9 peut entra\u00eener des erreurs, de l&#8217;instabilit\u00e9, voire des pannes de composants. C&#8217;est pourquoi il est essentiel de comprendre le fonctionnement d&#8217;une alimentation, les diff\u00e9rents types d&#8217;alimentation et de savoir choisir celle qui r\u00e9pond le mieux \u00e0 vos besoins. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Connectivit\u00e9: les c\u00e2bles qui alimentent le syst\u00e8me<\/strong><\/h3>\n\n\n\n<p> Toute alimentation \u00e9lectrique moderne est livr\u00e9e avec plusieurs types de c\u00e2bles, chacun ayant un r\u00f4le sp\u00e9cifique.<br> Voici les principales connexions que vous devez reconna\u00eetre&nbsp;: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>24 broches (carte m\u00e8re):<\/strong> alimente la carte m\u00e8re et le chipset principal.<\/li>\n\n\n\n<li><strong>Processeur 4\/8 broches:<\/strong> alimente le processeur ; se connecte au coin sup\u00e9rieur de la carte m\u00e8re.<\/li>\n\n\n\n<li><strong>PCIe 6\/8 broches (carte vid\u00e9o):<\/strong> certaines cartes vid\u00e9o n\u00e9cessitent une alimentation suppl\u00e9mentaire, v\u00e9rifiez donc si votre alimentation dispose de suffisamment de connecteurs PCIe (par exemple 6+2 broches).<\/li>\n\n\n\n<li><strong>Alimentation SATA:<\/strong> pour SSD, disques durs et accessoires modernes (tels que les contr\u00f4leurs RVB).<\/li>\n\n\n\n<li><strong>Molex 4 broches:<\/strong> connecteur plus ancien, peu utilis\u00e9, mais toujours utile pour les pompes de refroidissement ou les ventilateurs classiques.<\/li>\n<\/ul>\n\n\n\n<p><strong>Conseil\u00a0<\/strong> Avant d&#8217;acheter un bloc d&#8217;alimentation, v\u00e9rifiez les exigences de votre carte graphique et de votre carte m\u00e8re. L&#8217;absence de connecteur adapt\u00e9 peut signifier que le bloc d&#8217;alimentation n&#8217;est pas compatible avec votre syst\u00e8me.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"> <strong>2. Combien de watts sont suffisants pour votre PC ?<\/strong> <\/h3>\n\n\n\n<p> L\u2019une des questions les plus courantes est : \u00ab <strong>De combien de watts ai-je besoin ?<\/strong> \u00bb<br> La r\u00e9ponse d\u00e9pend de vos composants, en particulier de votre CPU et de votre GPU. <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> Un PC de jeu moyen (avec une seule carte graphique) a g\u00e9n\u00e9ralement besoin <strong>de 550 \u00e0 650 W.<\/strong> <\/li>\n\n\n\n<li> Les syst\u00e8mes haut de gamme, dot\u00e9s de cartes graphiques puissantes ou d\u2019un refroidissement liquide, peuvent n\u00e9cessiter <strong>750 \u00e0 1&nbsp;000 W.<\/strong> <\/li>\n<\/ul>\n\n\n\n<p>Vous pouvez utiliser un <a href=\"https:\/\/www.newegg.com\/tools\/power-supply-calculator\" target=\"_blank\" rel=\"noreferrer noopener\">calculateur de puissance d&#8217;alimentation<\/a> en ligne pour estimer la consommation totale.<br> En r\u00e8gle g\u00e9n\u00e9rale, choisissez une source avec <strong>10 \u00e0 20% de puissance sup\u00e9rieure<\/strong> \u00e0 celle dont votre syst\u00e8me a besoin.<br> Exemple\u00a0: si votre PC consomme 500\u00a0W, choisissez une alimentation <strong>de 600 \u00e0 650\u00a0W.<\/strong> Cette r\u00e9serve assure la stabilit\u00e9 et permet les mises \u00e0 niveau futures.<\/p>\n\n\n\n<p> Il est important de savoir qu&#8217;un bloc d&#8217;alimentation de 750 W <strong>ne consomme pas automatiquement 750 W<\/strong>&nbsp;; il fournit uniquement la puissance n\u00e9cessaire au syst\u00e8me. Cependant, il est d\u00e9conseill\u00e9 de choisir un bloc d&#8217;alimentation trop puissant (par exemple 1&nbsp;200 W pour un ordinateur de bureau), car vous risquez de payer plus cher sans r\u00e9el avantage. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"> <strong>3. Alimentation \u00e9lectrique &#8211; Puissance continue vs. Puissance de pointe<\/strong> <\/h3>\n\n\n\n<p> Lorsque vous lisez les sp\u00e9cifications d&#8217;une alimentation \u00e9lectrique, vous verrez des termes tels que \u00ab <strong>puissance de cr\u00eate<\/strong> \u00bb et \u00ab <strong>puissance continue<\/strong> \u00bb : <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> <strong>La puissance continue<\/strong> est la puissance r\u00e9elle que la source peut fournir de mani\u00e8re stable, sur le long terme. <\/li>\n\n\n\n<li> <strong>La puissance de pointe<\/strong> repr\u00e9sente un maximum temporaire, atteint lors de p\u00e9riodes de charge intense (par exemple, lors d&#8217;un jeu exigeant). <\/li>\n<\/ul>\n\n\n\n<p> Choisissez toujours une alimentation dont la puissance de sortie continue est proche des besoins de votre syst\u00e8me. Les mod\u00e8les bon march\u00e9 peuvent afficher des valeurs de cr\u00eate \u00e9lev\u00e9es, mais ils ne peuvent pas maintenir les m\u00eames performances de mani\u00e8re constante. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"> <strong>4. Protection du syst\u00e8me \u2013 la s\u00e9curit\u00e9 avant tout<\/strong> <\/h3>\n\n\n\n<p> L&#8217;alimentation est le seul composant qui interagit directement avec toutes les autres parties de votre PC, les protections int\u00e9gr\u00e9es sont donc essentielles pour la s\u00e9curit\u00e9 de l&#8217;ensemble du syst\u00e8me. <\/p>\n\n\n\n<p> Recherchez des sources qui incluent les \u00e9l\u00e9ments suivants&nbsp;: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>OVP (Over Voltage Protection)<\/strong> &#8211; protection contre les surtensions ;<\/li>\n\n\n\n<li><strong>SCP (Short Circuit Protection)<\/strong> &#8211; protection en cas de court-circuit ;<\/li>\n\n\n\n<li><strong>OCP (Protection contre les surintensit\u00e9s)<\/strong> &#8211; coupe l\u2019alimentation si le courant d\u00e9passe la limite de s\u00e9curit\u00e9.<\/li>\n<\/ul>\n\n\n\n<p> Utilisez \u00e9galement toujours une rallonge avec protection contre les surtensions pour \u00e9viter d\u2019endommager les composants en cas de fluctuations de puissance. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"> 5. Alimentation avec <strong>efficacit\u00e9 \u00e9nerg\u00e9tique <strong>certifi\u00e9e<\/strong><\/strong> \u00ab <strong>80 PLUS<\/strong> <strong>\u00bb<\/strong> <\/h3>\n\n\n\n<p>Outre la puissance, un autre crit\u00e8re crucial est <strong>l&#8217;efficacit\u00e9 de la source<\/strong>, c&#8217;est-\u00e0-dire la fa\u00e7on dont elle convertit l&#8217;\u00e9nergie \u00e9lectrique en \u00e9nergie utile pour les composants.<\/p>\n\n\n\n<p> Pour \u00eatre certifi\u00e9e, une alimentation \u00e9lectrique doit respecter la norme \u00ab<strong>&nbsp;80 PLUS<\/strong>&nbsp;\u00bb, ce qui signifie qu&#8217;elle pr\u00e9sente un rendement d&#8217;au moins 80&nbsp;%. Plus la certification est \u00e9lev\u00e9e, plus les pertes d&#8217;\u00e9nergie (et la chaleur produite) sont faibles. <\/p>\n\n\n\n<p> <strong>Voici les niveaux d\u2019efficacit\u00e9 les plus courants&nbsp;:<\/strong> <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> <strong>80 PLUS (standard)<\/strong> <\/li>\n\n\n\n<li> <strong>80 PLUS Bronze<\/strong> <\/li>\n\n\n\n<li> <strong>80 PLUS Argent<\/strong> <\/li>\n\n\n\n<li> <strong>80 PLUS Or<\/strong> <\/li>\n\n\n\n<li> <strong>80 PLUS Platine<\/strong> <\/li>\n\n\n\n<li> <strong>80 PLUS Titane<\/strong> <\/li>\n<\/ul>\n\n\n\n<p> <strong>Recommandation :<\/strong> pour un PC gaming ou de travail intensif, une alimentation <strong>Gold<\/strong> offre le meilleur rapport entre prix, performances et efficacit\u00e9. <\/p>\n\n\n\n<p> Une source efficace r\u00e9duit non seulement votre facture d\u2019\u00e9nergie, mais maintient \u00e9galement des temp\u00e9ratures plus basses et a une dur\u00e9e de vie plus longue. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"> <strong>6. Facteur de forme et type de c\u00e2ble<\/strong> <\/h3>\n\n\n\n<p>La plupart des cas utilisent des alimentations <strong>ATX standard<\/strong> , mais les syst\u00e8mes \u00e0 petit facteur de forme (SFF) peuvent n\u00e9cessiter des facteurs de forme tels que <strong>SFX<\/strong> ou <strong>CFX<\/strong>.<br> V\u00e9rifiez les dimensions du bloc d&#8217;alimentation et l&#8217;espace dans le bo\u00eetier avant l&#8217;achat.<\/p>\n\n\n\n<p> Les c\u00e2bles sources peuvent \u00eatre : <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Non modulaire:<\/strong> tous les c\u00e2bles sont fixes \u2013 moins cher, mais plus difficile \u00e0 g\u00e9rer.<\/li>\n\n\n\n<li><strong>Modulaire:<\/strong> vous pouvez connecter uniquement les c\u00e2bles dont vous avez besoin, offrant ainsi un aspect \u00e9pur\u00e9 et une meilleure circulation de l&#8217;air.<\/li>\n\n\n\n<li><strong>Semi-modulaire:<\/strong> un compromis entre les deux options.<\/li>\n<\/ul>\n\n\n\n<p><strong>Ne m\u00e9langez jamais des c\u00e2bles d&#8217;autres mod\u00e8les ou marques<\/strong>! &#8211; les connecteurs peuvent sembler identiques, mais avoir des brochages diff\u00e9rents et peuvent endommager l&#8217;alimentation ou les composants.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"> <strong>7. Fonctionnalit\u00e9s et esth\u00e9tique premium<\/strong> <\/h3>\n\n\n\n<p> <em>Les sources modernes offrent des options suppl\u00e9mentaires pour les passionn\u00e9s :<\/em> <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> \u00c9clairage LED RVB, <\/li>\n\n\n\n<li> boutons de test, <\/li>\n\n\n\n<li> moniteurs de consommation via USB, <\/li>\n\n\n\n<li> ou des c\u00e2bles personnalis\u00e9s avec gaine color\u00e9e. <\/li>\n<\/ul>\n\n\n\n<p> Ils n\u2019affectent pas les performances, mais ils peuvent ajouter du style et de la personnalit\u00e9 \u00e0 votre syst\u00e8me. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>8. Un investissement dans la stabilit\u00e9 et la durabilit\u00e9<\/strong><\/h3>\n\n\n\n<p> Choisir la bonne alimentation ne devrait pas \u00eatre une d\u00e9cision de derni\u00e8re minute. Une alimentation de qualit\u00e9 peut durer de 5 \u00e0 10 ans et \u00eatre r\u00e9utilis\u00e9e lors de futures mises \u00e0 niveau. <\/p>\n\n\n\n<p>Lors du choix de votre alimentation, gardez \u00e0 l\u2019esprit: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>puissance requise (W)<\/strong>,<\/li>\n\n\n\n<li><strong>certification d&#8217;efficacit\u00e9 (80 PLUS)<\/strong>,<\/li>\n\n\n\n<li><strong>protections int\u00e9gr\u00e9es<\/strong>,<\/li>\n\n\n\n<li><strong>format et c\u00e2bles compatibles<\/strong>,<\/li>\n\n\n\n<li> <strong>fiabilit\u00e9 des marques<\/strong> (Corsair, Seasonic, be quiet!, EVGA, ASUS, etc.). <\/li>\n<\/ul>\n\n\n\n<p> Une bonne alimentation alimente non seulement votre PC, mais le prot\u00e8ge \u00e9galement et prolonge sa dur\u00e9e de vie.<br> Choisissez judicieusement, votre ordinateur vous remerciera !<\/p>\n\t<div class=\"quickshare-container\">\r\n\t<ul class=\"quickshare-genericons monochrome quickshare-effect-expand\">\r\n\t\t<li class=\"quickshare-share\">Share:<\/li> \r\n\t\t<li><a href=\"https:\/\/facebook.com\/sharer.php?u=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fcomment-choisir-le-bloc-dalimentation-pour-votre-pc&amp;t=Comment+choisir+le+bloc+d%26%238217%3Balimentation+pour+votre+PC+<+Refurbished+Computers+-+ComputerShop.EU\" target=\"_blank\" title=\"Share on Facebook\"><span class=\"quickshare-facebook\">Facebook<\/span><\/a><\/li>\t\t<li><a href=\"https:\/\/twitter.com\/intent\/tweet?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fcomment-choisir-le-bloc-dalimentation-pour-votre-pc&amp;text=Comment+choisir+le+bloc+d%26%238217%3Balimentation+pour+votre+PC+<+Refurbished+Computers+-+ComputerShop.EU\" target=\"_blank\" title=\"Share on Twitter\"><span class=\"quickshare-twitter\">Twitter<\/span><\/a><\/li>\t\t<li><a href=\"http:\/\/pinterest.com\/pin\/create\/button\/?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fcomment-choisir-le-bloc-dalimentation-pour-votre-pc&amp;media=https%3A%2F%2Fcomputershop.eu%2Fblog%2Fwp-content%2Fuploads%2F2025%2F10%2FPSU-300x212.png&amp;description=Pourquoi+le+bloc+d%27alimentation+%28PSU%29+est+essentiel+aux+performances+du+PC+Lors+de+l%27assemblage+ou+de+l%27achat+d%27un+ordinateur%2C+on+accorde+souvent+une+grande+importance+au+processeur%2C+%C3%A0+la+carte+graphique+ou+%C3%A0+la+m%C3%A9moire+vive.+Cependant%2C+le+bloc+d%27alimentation%26hellip%3B\" target=\"_blank\" title=\"Share on Pinterest\"><span class=\"quickshare-pinterest\">Pinterest<\/span><\/a><\/li>\t\t<li><a href=\"http:\/\/linkedin.com\/shareArticle?mini=true&amp;url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fcomment-choisir-le-bloc-dalimentation-pour-votre-pc&amp;title=Comment+choisir+le+bloc+d%26%238217%3Balimentation+pour+votre+PC&amp;source=Refurbished+Computers+-+ComputerShop.EU&amp;summary=Pourquoi+le+bloc+d%27alimentation+%28PSU%29+est+essentiel+aux+performances+du+PC+Lors+de+l%27assemblage+ou+de+l%27achat+d%27un+ordinateur%2C+on+accorde+souvent+une+grande+importance+au+processeur%2C+%C3%A0+la+carte+graphique+ou+%C3%A0+la+m%C3%A9moire+vive.+Cependant%2C+le+bloc+d%27alimentation%26hellip%3B\" title=\"Share on Linkedin\" target=\"_blank\"><span class=\"quickshare-linkedin\">Linkedin<\/span><\/a><\/li>\t\t<li><a href=\"https:\/\/plus.google.com\/share?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fcomment-choisir-le-bloc-dalimentation-pour-votre-pc\" target=\"_blank\" title=\"Share on Google+\"><span class=\"quickshare-googleplus\">Google+<\/span><\/a><\/li>\t\t\t\t\t\t\t\t<li><a href=\"mailto:?subject=Refurbished+Computers+-+ComputerShop.EU:+Comment+choisir+le+bloc+d%26%238217%3Balimentation+pour+votre+PC&amp;body=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fcomment-choisir-le-bloc-dalimentation-pour-votre-pc\" target=\"_blank\" title=\"Share via Email\"><span class=\"quickshare-email\">Email<\/span><\/a><\/li>\t<\/ul>\r\n\t<\/div>\r\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Pourquoi le bloc d&#8217;alimentation (PSU) est essentiel aux performances du PC Lors de l&#8217;assemblage ou de l&#8217;achat d&#8217;un ordinateur, on accorde souvent une grande importance au processeur, \u00e0 la carte graphique ou \u00e0 la m\u00e9moire vive. Cependant, le bloc d&#8217;alimentation &hellip; <a href=\"https:\/\/computershop.eu\/blog\/fr\/comment-choisir-le-bloc-dalimentation-pour-votre-pc\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":1225,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[178],"tags":[3302,3314,3323,3320,3305,498,642,3308,3435,3317,648],"class_list":["post-1229","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutoriels","tag-80-plus-or","tag-alimentation","tag-alimentation-modulaire","tag-alimentation-pc","tag-comment-choisir-la-bonne-source","tag-composants-pc","tag-computershop-fr","tag-efficacite-energetique-des-pc","tag-psu-gaming-fr","tag-source-informatique","tag-technologie-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Comment choisir le bloc d&#039;alimentation pour votre PC - Refurbished Computers - ComputerShop.EU<\/title>\n<meta name=\"description\" content=\"Le bloc d&#039;alimentation est l&#039;un des composants les plus importants de votre syst\u00e8me. 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