Nvidia chystá novou highendovou grafiku pro Čínu. Dostane 24GB paměť a „překvapení“

18. 6. 2025

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GeForce RTX 5090 Founders Edition Autor: Nvidia
GeForce RTX 5090 Founders Edition
Čína dostane náhradu za grafickou kartu RTX 5090 D, kterou americké regulace zakázaly vyvážet. Nová highendová herní karta se možná bude jmenovat DD.

Minulý měsíc jsme psali o tom, že Nvidia už nesmí do Číny vozit GeForce RTX 5090D, což byl speciální model nové herní grafiky, který měl na rozdíl od běžné GeForce RTX 5090 omezený AI výkon, aby se vyhovělo sankcím. Nakonec to ale nestačilo a mezi dubnem a květnem Nvidia od této karty čínský trh odstřihla. Teď ovšem chystá další pokus, který by v Číně měl její nejdražší herní grafiku nahradit. Bude však více ořezaný.

GeForce RTX 5090DD

Podle dnešních informací od leakera vystupujícího na Twitteru pod přezdívkou MEGAsizeGPU Nvidia chystá nový speciální model pro Čínu, který by se možná mohl jmenovat GeForce RTX 5090 „DD“ či RTX 5090DD. Ale jméno možná ještě není vybrané a ve finále se karta může označovat odlišně.

Tato karta stále bude založená na čipu GB202 jako GeForce RTX 5090, ten se tedy do Číny stále bude vyvážet. Označení modelu karty je prý PG145 SKU 40 a kód použité konfigurace čipu, která je nová, je GB202–240. To, že už leaker má tato označení, implikuje, že karta je skutečně v přípravě s konkrétními parametry a už o ní mají informace výrobci karet, místo aby šlo jen o někde zachycenou zmínku o tom, že Nvidia nějakou náhradu zvažuje.

To pak doložil Kopite7kimi, který mívá o plánech Nvidie nejlepší informace a potvrdil označení PCB i čipu (ten má být označený „GB202–240-K*-A1“). Kopite7kimi ale přidal ale rovnou i specifikace grafiky. GeForce RTX 5090 DD (pokud se tak bude jmenovat) dostane 21 760 shaderů neboli 170 bloků SM z celkových 192 SM na čipu. To znamená, že po stránce počtu výpočetních jednotek nebude osekaná, hlavní model RTX 5090 jich má přesně stejně. Pokud bude něco opižláno, tak asi zase výkon v AI akceleraci, což může být řešeno na úrovni firmwaru a ovladačů.

Kde Nvidia ale ubere, je v propustnosti a kapacitě grafické paměti. Karta dostane jen 24 GB typu GDDR7 a to také znamená, že bude používat jen 384 bitů širokou sběrnici. Efektivní frekvence zůstává stejná (28,0 GHz) Propustnost tak klesne na 75 % propustnosti karty GeForce RTX 5090 – měla by dělat 1344 GB/s.

GeForce RTX 5090 Founders Edition

GeForce RTX 5090 Founders Edition

Autor: Nvidia

Bude asi dost zajímavé otestovat výkon této karty a vidět, jak moc highendovému Blackwellu snížená propustnost vezme z herního výkonu (zejména asi v nejvyšších rozlišeních, v nižších to moc vidět být nemusí). GeForce RTX 5090 DD údajně používá i stejné TDP (575 W) jako standardní model, takže ani spotřebou nebude držená zpátky a hrubý výpočetní výkon by měla mimo AI mít stejný. Dokonce možná i vyšší, protože v těchto 575 W je zahrnutá i paměť, která bude u RTX 5090DD mít nižší příkon. A tím zbude víc wattů ke spálení v samotném čipu GPU.

docker + kubernetes školení s dotací tip

Překvapení?

Kopite7kimi také píše, že karta přinese nějaké překvapení, o kterém zatím nevíme, jakého charakteru je. Mohlo by jít o nějakou softwarovou funkci, nebo by mohla být řeč o nějakém omezení v souvislosti se sankcemi. Nebo že by karta dostala dva napájecí konektory 12V-2×6 pro bezpečnější provoz? Možná tedy na ní bude leccos zajímavého, i když na našich trzích se prodávat nebude.

Zdroje: MEGAsizeGPU, Kopite7kimi, VideoCardz

Autor článku

Redaktor portálu Cnews.cz. Zaměřuje se na procesory, mobilní SoC, grafické karty, disky a další počítačový hardware. Profil autora →

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It is the responsibility of the Publisher to // implement this function when necessary. // setupUIForContent(); } function onActiveView() { if (outstreamContainer) { const containerOffset = outstreamContainer.getBoundingClientRect(); const windowHeight = window.innerHeight; if (containerOffset.top < windowHeight/1 && containerOffset.bottom > 0.0) { if (outstreamPaused) { adsManager.resume(); outstreamPaused = false; } return true; } else { if (!outstreamPaused) { adsManager.pause(); outstreamPaused = true; } } } return false; } let outstreamInitInterval; if (typeof cpexPackage !== "undefined") { outstreamInitInterval = setInterval(tryToInitializeOutstream, 100); } else { const wrapper = getWrapper(); if (wrapper) { let outstreamInitialized = false; window.addEventListener('scroll', () => { if (!outstreamInitialized) { const containerOffset = wrapper.getBoundingClientRect(); const windowHeight = window.innerHeight; if (containerOffset.top < windowHeight / 1 && containerOffset.bottom > 0.0) { outstreamInit(); outstreamInitialized = true; } } }); } } function tryToInitializeOutstream() { const wrapper = getWrapper(); if (wrapper) { const containerOffset = wrapper.getBoundingClientRect(); const windowHeight = window.innerHeight; if (containerOffset.top < windowHeight / 1 && containerOffset.bottom > 0.0) { if (cpexPackage.adserver.displayed) { clearInterval(outstreamInitInterval); outstreamInit(); } } } else { clearInterval(outstreamInitInterval); } } }
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