{"id":419070,"date":"2021-10-20T11:38:22","date_gmt":"2021-10-20T09:38:22","guid":{"rendered":"https:\/\/mybroadband.co.za\/news\/?p=419070"},"modified":"2021-10-20T11:39:30","modified_gmt":"2021-10-20T09:39:30","slug":"windows-11-update-fixes-amd-performance-issues","status":"publish","type":"post","link":"https:\/\/mybroadband.co.za\/news\/software\/419070-windows-11-update-fixes-amd-performance-issues.html","title":{"rendered":"Windows 11 update fixes AMD performance issues"},"content":{"rendered":"

A new Windows 11 update appears to have fixed some of the performance issues on PCs running AMD Ryzen processors.<\/p>\n

Soon after the launch of the new operating system on 5 October, AMD published a tech support document stating that it was aware of two performance changes that its processors might exhibit while running Windows 11.<\/p>\n

One of these would result in measured and functional Level 3 (L3) cache latency increasing approximately three-fold.<\/p>\n

Applications sensitive to memory subsystem access time would take a 3-5% performance hit. However, AMD said 10-15% outliers were also observed in popular eSports games.<\/p>\n

Put simply, it resulted in big frame drops in several games compared to the same systems running Windows 10.<\/p>\n

A Patch Tuesday update on 12 October made the problem worse, with TechPowerUp<\/a><\/strong> finding it increased latency by almost twice as much.<\/p>\n

Fortunately, last week, Microsoft rolled out developer and beta versions of a patch for the issue called KB5006746.<\/p>\n

Benchmarking tool AIDA64<\/strong><\/a> ran tests on it and found that the latency issue was fixed.<\/p>\n

The screenshots below show the performance of the L3 cache before and after the update, showing a marked improvement.<\/p>\n

 <\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

Microsoft’s official patch, released on Tuesday, 19 October 2021, acknowledges that it fixed the issue.<\/p>\n

AMD is set to roll out a driver update on Thursday, 21 October, to address the second performance change.<\/p>\n

That should fix an issue where the UEFI CPPC2 (“preferred core”) does not preferentially schedule threads on a processor’s fastest core.<\/p>\n

AMD said that applications sensitive to the performance of one or a few CPU threads might exhibit reduced performance because of this issue.<\/p>\n

This impact may be particularly noticeable in processors with more than eight cores and a thermal design power (TDP) of over 65W.<\/p>\n

Now read: Best and worst versions of Windows<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"

A new Windows 11 update appears to have fixed issues with performance on computers running AMD Ryzen processors.<\/p>\n","protected":false},"author":341042,"featured_media":353953,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[577,73476,70233],"class_list":["post-419070","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software","tag-amd","tag-amd-ryzen-processors","tag-windows-11"],"_links":{"self":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/419070"}],"collection":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/users\/341042"}],"replies":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/comments?post=419070"}],"version-history":[{"count":1,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/419070\/revisions"}],"predecessor-version":[{"id":419102,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/419070\/revisions\/419102"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media\/353953"}],"wp:attachment":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media?parent=419070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/categories?post=419070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/tags?post=419070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}