{"id":159483,"date":"2022-12-16T11:21:01","date_gmt":"2022-12-16T11:21:01","guid":{"rendered":"https:\/\/harchi90.com\/amds-flagship-rx-7900-xtx-gpus-discovered-to-integrate-a0-silicon-revision-affected-by-serious-hardware-issues\/"},"modified":"2022-12-16T11:21:01","modified_gmt":"2022-12-16T11:21:01","slug":"amds-flagship-rx-7900-xtx-gpus-discovered-to-integrate-a0-silicon-revision-affected-by-serious-hardware-issues","status":"publish","type":"post","link":"https:\/\/harchi90.com\/amds-flagship-rx-7900-xtx-gpus-discovered-to-integrate-a0-silicon-revision-affected-by-serious-hardware-issues\/","title":{"rendered":"AMD’s flagship RX 7900 XTX GPUs discovered to integrate A0 silicon revision affected by serious hardware issues"},"content":{"rendered":"
\n

New evidence that AMD’s 7900XTX flagship GPUs could suffer from hardware problems has come to light. Looking at the independent reviews that tested the reference cards, one would wonder if AMD may have turned to some false advertising strategies back in November when the first performance graphs were released. Granted, AMD said up to<\/b> 70% increased performance over the 6950 XT, and maybe that set expectations too high, as most reviews show ~40% performance gains on average. More recent findings suggest AMD launched the flagship Navi 31 GPUs on the A0 stepping, which appears to have some hardware issues that affect performance. These issues are exhaustively explained by Twitter user @davidbepo in a quite long thread of posts.<\/p>\n

First off, @davidbepo explains that, while GPU-Z shows revision C8 for some AIB versions, the actual revision is A0 as noted in the VBIOS. Apparently, A0 was a problematic stepping that forced AMD to delay the Navi 31 launch by almost a year, yet AMD launched the flagship models with this stepping anyway.<\/p>\n

The first A0 issue presented is the high GPU clock variability. Some games like Cyberpunk 2077 run at 2.2 GHz, while others run anywhere between 2.2 and 2.9 GHz. Then there is the strange issue with the high power draw noticed by each and every review. Despite voltage being lower than expected (barely touches 1V), the cards somehow draw more than 400 amps. Ultimately, by @devidbepo’s calculations, even though Navi 31 gets double the number of shaders over the previous gen flagships, each new compute unit is only 12% faster at the same clocks, which is more on the low side considering the jump to 5 nm .<\/p>\n

Another issue that might be impacting the Navi 31 performance was suggested by Twitter user @Kepler_L2, who discovered in the Messa3D github that \u201csome A0 chips\u201d come with a non-working shader prefetch. On RDNA 2, non-working shader prefetches would lead to a 5% penalty. However, the RDNA 3 architecture introduced with the Navi 31 chips has different parameters and the impact could differ as well. This problem seems to be corrected on the mid-range Navi 32 chips expected to be released in the first months of 2023. <\/p>\n

It is unclear why AMD chose to stick with the A0 stepping. The more plausible explanation would be that Team Red was not able to fix things in time for the release window, as it needed to rush a competing model against Nvidia’s new RTX 4000 series. Hopefully, AMD could eventually release a fixed flagship revision, possibly with a 7950 XTX model, but most likely no sooner than mid-2023.<\/p>\n

\n

Buy the MSI Gaming Radeon RX 6950 XT on Amazon<\/p>\n<\/div>\n

\n
<\/source><\/picture><\/div>\n
Bogdan Solca – Senior Tech Writer – 1902 articles published on Notebookcheck<\/span> since 2017<\/div>\n

I first stepped into the wondrous IT&C world when I was around seven years old. I was instantly fascinated by computerized graphics, whether they were from games or 3D applications like 3D Max. I’m also an avid reader of science fiction, an astrophysics aficionado, and a crypto geek. I started writing PC-related articles for Softpedia and a few blogs back in 2006. I joined the Notebookcheck team in the summer of 2017 and am currently a senior tech writer mostly covering processor, GPU, and laptop news.<\/p>\n<\/div>\n

.<\/p>\n","protected":false},"excerpt":{"rendered":"

New evidence that AMD’s 7900XTX flagship GPUs could suffer from hardware problems has come to light. Looking at the independent reviews that tested the reference cards, one would wonder if AMD may have turned to some false advertising strategies back in November when the first performance graphs were released. Granted, AMD said up to 70% …<\/p>\n

AMD’s flagship RX 7900 XTX GPUs discovered to integrate A0 silicon revision affected by serious hardware issues<\/span> Read More »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[4],"tags":[42983,1069,2103,42987,42982,2104,42984,42986,2097,42981,42988,2102,2096,2105,36143,31006,2101,2098,569,2100,2099,42985],"jetpack_publicize_connections":[],"yoast_head":"\nAMD's flagship RX 7900 XTX GPUs discovered to integrate A0 silicon revision affected by serious hardware issues - harchi90<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/news.google.com\/__i\/rss\/rd\/articles\/CBMimwFodHRwczovL3d3dy5ub3RlYm9va2NoZWNrLm5ldC9BTUQtcy1mbGFnc2hpcC1SWC03OTAwLVhUWC1HUFVzLWRpc2NvdmVyZWQtdG8taW50ZWdyYXRlLUEwLXNpbGljb24tcmV2aXNpb24tYWZmZWN0ZWQtYnktc2VyaW91cy1oYXJkd2FyZS1pc3N1ZXMuNjc0NzY2LjAuaHRtbNIBAA?oc=5\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AMD's flagship RX 7900 XTX GPUs discovered to integrate A0 silicon revision affected by serious hardware issues - harchi90\" \/>\n<meta property=\"og:description\" content=\"New evidence that AMD’s 7900XTX flagship GPUs could suffer from hardware problems has come to light. 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Today, the company announced the Radeon RX 7900 XTX and RX 7900 XT, two confusingly named GPUs powered by its new RDNA\u2026","rel":"","context":"In "Technology"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":117413,"url":"https:\/\/harchi90.com\/amds-rdna-3-gpus-are-way-cheaper-than-the-rtx-4090\/","url_meta":{"origin":159483,"position":4},"title":"AMD’s RDNA 3 GPUs are Way Cheaper Than the RTX 4090","date":"November 4, 2022","format":false,"excerpt":"screenshot: AMDBack in August, Dr. Lisa Su introduced the world to AMD's newest iteration of CPU technology, the Ryzen 7000 Series\u2013but she didn't stop there. We got an announcement for an announcement: RDNA 3, AMD's next generation of GPU technology. Well, today is November 3rd, and we now know more\u2026","rel":"","context":"In "Technology"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":116716,"url":"https:\/\/harchi90.com\/watch-the-amd-radeon-rx-7000-rdna-3-gpu-unveil-livestream-here-gaming-gpus-enter-the-chiplet-era\/","url_meta":{"origin":159483,"position":5},"title":"Watch The AMD Radeon RX 7000 “RDNA 3” GPU Unveil Livestream Here, Gaming GPUs Enter The Chiplet Era","date":"November 3, 2022","format":false,"excerpt":"Today, AMD will be hosting its \"Together We Advanced Gaming\" livestream where the company will unveil its Radeon RX 7000 \"RDNA 3\" GPUs. Chiplets Come To Gaming GPUs! AMD Radeon RX 7000 \"RDNA 3\" Graphics Card Unveil Is Only 24 Hours Away, Tune In to The Livestream here The livestream\u2026","rel":"","context":"In "Technology"","img":{"alt_text":"RADV Radeon Vulkan Driver Continues To Improve Ray Tracing Performance For AMD GPUs 1","src":"https:\/\/i0.wp.com\/cdn.wccftech.com\/wp-content\/uploads\/2022\/08\/AMD-Radeon-RX-GPUs-_1-Custom-low_res-scale-2_00x-Custom-740x463.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"fifu_image_url":"https:\/\/www.notebookcheck.net\/fileadmin\/Notebooks\/News\/_nc3\/998_die_shot.jpg","_links":{"self":[{"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/posts\/159483"}],"collection":[{"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/comments?post=159483"}],"version-history":[{"count":0,"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/posts\/159483\/revisions"}],"wp:attachment":[{"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/media?parent=159483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/categories?post=159483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/harchi90.com\/wp-json\/wp\/v2\/tags?post=159483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}