Nejvýkonnější procesor Rome: AMD Epyc 7H12 pro vodou chlazené superpočítače

19. 9. 2019

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Minulá měsíc AMD po Ryzenech 3000 vydalo také 7nm procesory s jádry Zen 2 pro servery, a to Epyc druhé generace označené 7002. Při tomto odhalení byl jako nejvýkonnější model představen 64jádrový Epyc 7742, ovšem nebylo to zdá se definitivní. Firma teď přišla ještě s modelem, který bude speciálně určený pro superpočítače a měl být ještě o něco rychlejší. Tato novinka byla oznámena včera na prezentaci v Římě (Epyc 7002 má kódové označení „Rome“), kde se AMD pochlubilo některými „zářezy“, v kterých se Epyc 7002 objeví: servery Dell EMC PowerEdge, použitím Epyců 7002 v IBM Cloudu, systémech pro 5G mobilní připojení od Nokie nebo nasazením Epyců 7402P v OVHcloudu. V tiskovce se také uvádí, že tyto procesory začne používat také TSMC pro vlastní účely, mimo jiné asi simulace při vývoji.

Epyc 7H12: 64jádro pro vodní superpočítače

Spolu s firmou Atos, který se zabývá superpočítači, pak AMD předvedlo onen nový HPC model procesorů Rome, který se jmenuje Epyc 7H12. Ono há v názvu možná znamená i to, že model je uzpůsobený zvlášť pro vodní chlazení, používané ve vysoce výkonných HPC serverech. Tento model je totiž určený specificky pro podobná použití v superpočítačích a podobných systémech, nikoliv v normálních serverech.

Epyc 7H12 má zvýšené TDP na 280 W proti 225W TDP standardního Epycu 7742, což bude umožňovat vyšší výkon. Jde o 64jádro s plnou 256MB cache (která je však rozdělená na 16 × 16 MB). Základní frekvence je zvýšena na 2,6 GHz místo 2,25 GHz u Epycu 7742, paradoxně je ale o něco snížené maximální turbo – z 3,4 na 3,3 GHz. Epyc 7H12 totiž při práci typicky bude vytížen spíše na všech jádrech než jen na jednom dvou, takže výkon pro jen jednovláknovou zátěž není tak kritický. Procesory budou samozřejmě umět PCI Express 4.0, který bude v HPC důležitá výhoda proti procesorům Intel, protože připojené výpočetní akcelerátory (GPU, FPGA) mohou mít vyšší propustnost při komunikaci s CPU.

Server Bullsequana XH2000 s procesory Epyc 7H12 Server Bullsequana XH2000 s procesory Epyc 7H12

4,2 TFLOPS v Linpacku na CPU

Epyc 7H12 má podle AMD být asi o 11 % výkonnější než Epyc 7742 – toto je údaj pro výkon v benchmarku Linpack, kde 7H12 dosahuje skóre 4,2 TFLOPS. Procesor bude k mání například v serveru Bullsequana XH2000 už zmíněné firmy Atos (značka superpočítačů Bull patří pod ni) s vodním chlazením. Ale nejde o nějaký speciální procesor, má být k dispozici všem zájemcům. Tím jsou asi ale mínění hlavně výrobci serverů, retailová dostupnost samostatných procesorů moc jasná není. A také nebyla sdělená nějaká oficiální cena, na rozdíl od standardních modelů Epycu 7002, kde nejvyšší model 7742 stojí oficiálně 6950 dolarů.

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Tip: Superpočítač Frontier budou pohánět procesory AMD Epyc a Radeony

AMD jinak také uvádí, že spolu s výrobci serverů zaznamenalo s Epycem 7002 přes 100 světových výkonnostních rekordů v různých programech. Čímž chce ukázat, že alespoň v některých oborech jsou teď Epycy nejen alternativou ke Xeonům, ale i výkonnějším řešením. Vedle výhod jako je PCI Express 4.0 je to samozřejmě také díky 7nm výrobnímu procesu a jeho zlepšení energetické efektivity a hustoty tranzistorů, proti čemuž je Intel teď se 14nm technologií v nevýhodě.

Galerie: Odhalení 7nm procesorů AMD Epyc 7002 (Rome), prezentace

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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