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ЦОДы, GPU, NVIDIA A16, охлаждение: о серьезных вещах простым языком

Добрый день, дорогой читатель. Меня зовут Селезнев Павел, я инженер второй линии поддержки в облачном провайдере Nubes. С каждой новой статьёй я расту в должности, поэтому пишу ещё одну :)

Несколько месяцев назад нам с коллегой поставили задачу: провести сравнительные тесты, чтобы проверить, насколько сильно разогреется видеокарта под нагрузкой при использовании воздуха и диэлектрической жидкости.

Об этих тестах я и расскажу в статье, которая должна пролить свет на жизнь GPU в ЦОДе.

Предисловие

Как понятно из названия статьи, речь пойдёт о жизни GPU в контексте ЦОДа (центра обработки данных), проведённых тестах разных вариантов охлаждения и выводах, к которым пришла наша команда по итогу этих самых тестов и рассуждений.

Тестировали мы GPU NVIDIA A16 в течение нескольких дней.

На момент написания материала в нашем ЦОДе реализована система охлаждения посредством использования прецизионных кондиционеров, а в качестве хладагента — фреон.

Данная система представляет собой большие промышленные шкафы (кондиционеры), которые беспрерывно охлаждают нагретый оборудованием воздух с помощью того самого фреона. На картинке упрощённо показан процесс теплообмена.

Процесс теплообмена в серверной
Процесс теплообмена в серверной

В своей практике я видел и другие системы: водяные кондиционеры, контуры охлаждения на гликоле, чиллерные установки, рассеивающие тепло. О них тоже можно поговорить отдельно.

Ещё чуть-чуть и перейдём к тестам

Как я и сказал, нам поступила задача проверить рабочие температуры при использовании иммерсионного охлаждения — технологии жидкостного погружения.

Основа принципа не сильно отличается от воздушного охлаждения. Движение охлаждающего вещества (хладагента/иммерсионной жидкости/диэлектрической жидкости) происходит также естественно под действием конвекции (движения тёплых, холодных масс) и также с использованием дополнительных насосов в контуре (тепло рассеивается на внешних блоках). Оборудование полностью погружено в жидкость, исключая контакт с внешней средой.

Также из особенностей отметим, что для монтажа стенда требуется специальная погружная стойка и сервер. У подобного оборудования предусмотрены специальные отверстия для лучшей циркуляции охлаждающей жидкости. Плюс ко всему требуется дополнительная подготовка видеокарты перед подобным использованием — снятие радиаторов и кулеров (если говорить про любимые многими RTX 4090 и подобные). Из-за этого, прошу заметить, пропадает гарантия на оборудование.

Спецификация

Так вот, нам дали возможность пощупать что-то новое и провести сравнительный тест охлаждения под нагрузкой, к результатам которого я так долго подводил.

Спецификация и сухие цифры ниже.

У нас имеются:

- NVIDIA A16

  • Архитектура графического процессора: NVIDIA Ampere.

  • Базовая частота чипа графического ускорителя: 1312 МГц.

  • Число универсальных процессоров: 5120.

  • Объём памяти: 64 Гб.

  • Тип памяти: GDDR6.

  • Частота видеопамяти: 12500 МГц.

  • Система охлаждения: пассивная.

  • TDP: 250 Вт.

- 2 среды

  • Воздушная.

  • Жидкостная (в нашем случае было минеральное масло).

- Софт для нагрузки видеокарты

  • Aida64.

  • Furmark.

  • Hashcat (нагрузили перебором словарей).

- Нагрузка и наблюдение за картами в течение 4 дней по 24 часа в сутки

- Самое интересное — иммерсионная жидкость

  • Используется диэлектрическая охлаждающая жидкость, полимер низкой вязкости ДОЖ1.

  • Горючесть 600 градусов в открытом тигле.

  • Температура рабочего диапазона -60С +180С.

  • Срок службы не менее 10 лет.

  • Уровень испаряемости низкий, поэтому подливать не нужно (если система не даст течь).

  • Расчётный механический PUE 1.06.

Тесты

Скрины по результатам тестов ниже.

Воздушное охлаждение

Aida
Aida
Furmark
Furmark
Hashcat
Hashcat
Температура без нагрузки
Температура без нагрузки

Жидкостное охлаждение

Aida
Aida
Furmark
Furmark
Hashcat
Hashcat
Температура без нагрузки
Температура без нагрузки

Общая статистика: в таблицу собрал средние значения (то есть среднее по всем четырём ядрам).

Воздушное охлаждение

Без нагрузки

Aida

Furmark

Hashcat

Среднее под нагрузкой (среднее из 3х тестов)

Наибольшее значение в пике (пик зафиксированный в тесте)

45,88

81,63

86,4

85,1

84,28

92,32

Жидкостное охлаждение

Без нагрузки

Aida

Furmark

Hashcat

Среднее под нагрузкой

Наибольшее значение в пике

29,05

55,1

58,24

57,16

56,8

60,38

Итоги теста

На практике была доказана более высокая эффективность использования жидкостного охлаждения.

Зачем оно всё было надо

На данный момент технологии ИИ развиваются бурно, и для обучения или использования искусственного интеллекта требуются вычислительные мощности. Получается, что ИИ = GPU.

Видеокарты, создание инфраструктуры и её поддержание в рабочем состояние – дорого. Поэтому GPU из облака выглядит довольно «вкусно», особенно предприятиям/компаниям/ИП, которые хотели бы «пощупать» карты в тесте (у нас, например, это 14 дней) или интегрировать ИИ в работу без постройки масштабных комплексов и дополнительных затрат.

Так зачем делали тесты-то? Всё ещё непонятно.

Раз ресурсы GPU востребованы на рынке, то, если один облачный провайдер хочет конкурировать с другими, в своём арсенале эти карточки обязательно нужно иметь. Nubes хочет предоставлять GPU-as-a-Service в большом количестве.

Большое количество графических процессоров – это много тепла и повышенная нагрузка на кондиционеры, которые работают… правильно, от электричества. Оно растёт в цене, следовательно, увеличиваются расходы на эксплуатацию. Жидкостное же охлаждение требует меньше энергии, и это весомая причина рассмотреть такой вариант.

Какие выводы мы сделали

Иммерсионное охлаждение — лучший холод, что, в свою очередь, увеличивает срок эксплуатации оборудования. Да и ёмкости с минеральным маслом шумят меньше, чем кондиционеры. Ещё один существенный плюс — иммерсионное решение не требует «особой» подготовки места: наличие фальшполов для циркуляции холодных воздушных масс, создание изолированных коридоров, место под кондиционеры.

Всё круто, всё здорово, но подходит такой вариант охлаждения не всем, и есть у него ряд существенных «но».

Во-первых, как уже было сказано, для использования такого вида охлаждения нужна подготовка видеокарты. Потребуется снятие термоинтерфейсов и системы воздушного охлаждения. Из-за этого теряется гарантия карточки. Для co-location, например, такой вариант не очень подходит.

Во-вторых, для иммерсионного охлаждения используются специальные сервера, которые по производительности RAM и CPU уступают дефолтным аналогам. Публичное облако на них построить можно, но вариант не приоритетный. Также погружные стойки, которые мы видели, рассчитаны всего на 26U, то есть на 26 позиций для серверов. Под заказ, конечно, сделают и больше, но стандартное решение у ТК «Связь» именно 26U.

В-третьих, жидкостное охлаждение не исключает необходимость установки внешних блоков для отвода тепла и резервирования электропитания.

В общем, вывод такой: технология есть, она эффективная, но далеко не во всех случаях. И нужно взвешивать плюс и минусы, ну и, конечно же, считать выгоду.

Надеюсь, вам было интересно. Оставляйте свои мысли и вопросы в комментариях.

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    "In the crypto world, this is great news I want to share. Last year, I fell victim to a scam disguised as a safe investment option. I have invested in crypto trading platforms for about 10yrs thinking I was ensuring myself a retirement income, only to find that all my assets were either frozen, I believed my assets were secure — until I discovered that my BTC funds had been frozen and withdrawals were impossible. It was a devastating moment when I realized I had been scammed, and I thought my Bitcoin was gone forever, Everything changed when a close friend recommended the Capital Crypto Recover Service. Their professionalism, expertise, and dedication enabled me to recover my lost Bitcoin funds back — more than €560.000 DEM to my BTC wallet. What once felt impossible became a reality thanks to their support. If you have lost Bitcoin through scams, hacking, failed withdrawals, or similar challenges, don’t lose hope. I strongly recommend Capital Crypto Recover Service to anyone seeking a reliable and effective solution for recovering any wallet assets. They have a proven track record of successful reputation in recovering lost password assets for their clients and can help you navigate the process of recovering your funds. Don’t let scammers get away with your hard-earned money – contact Email: [email protected] Phone CALL/Text Number: +1 (336) 390-6684 Contact: [email protected] Website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 12.10.25 01:12 harristhomas7376

    "In the crypto world, this is great news I want to share. Last year, I fell victim to a scam disguised as a safe investment option. I have invested in crypto trading platforms for about 10yrs thinking I was ensuring myself a retirement income, only to find that all my assets were either frozen, I believed my assets were secure — until I discovered that my BTC funds had been frozen and withdrawals were impossible. It was a devastating moment when I realized I had been scammed, and I thought my Bitcoin was gone forever, Everything changed when a close friend recommended the Capital Crypto Recover Service. Their professionalism, expertise, and dedication enabled me to recover my lost Bitcoin funds back — more than €560.000 DEM to my BTC wallet. What once felt impossible became a reality thanks to their support. If you have lost Bitcoin through scams, hacking, failed withdrawals, or similar challenges, don’t lose hope. I strongly recommend Capital Crypto Recover Service to anyone seeking a reliable and effective solution for recovering any wallet assets. They have a proven track record of successful reputation in recovering lost password assets for their clients and can help you navigate the process of recovering your funds. Don’t let scammers get away with your hard-earned money – contact Email: [email protected] Phone CALL/Text Number: +1 (336) 390-6684 Contact: [email protected] Website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 12.10.25 19:53 Tonerdomark

    A crook swiped my Dogecoin. It ruined my whole world. Then Mr. Sylvester showed up. He fixed it all. He pulled back €211,000 for me. Not one cent missing from my profits. His steady cool and sharp tech know-how won back my trust. I got my money smooth and sound. After endless worry, relief hit me hard. I trusted him completely. Lost cash to a scam? Hit him up now at { yt7cracker@gmail . com }. His aid turned my life around. WhatsApp at +1 512 577 7957.

  • 12.10.25 21:36 blessing

    Writing this review is a joy. Marie has provided excellent service ever since I started working with her in early 2018. I was worried I wouldn't be able to get my coins back after they were stolen by hackers. I had no idea where to begin, therefore it was a nightmare for me. However, things became easier for me after my friend sent me to [email protected] and +1 7127594675 on WhatsApp. I'm happy that she was able to retrieve my bitcoin so that I could resume trading.

  • 13.10.25 01:11 elizabethrush89

    God bless Capital Crypto Recover Services for the marvelous work you did in my life, I have learned the hard way that even the most sensible investors can fall victim to scams. When my USD was stolen, for anyone who has fallen victim to one of the bitcoin binary investment scams that are currently ongoing, I felt betrayal and upset. But then I was reading a post on site when I saw a testimony of Wendy Taylor online who recommended that Capital Crypto Recovery has helped her recover scammed funds within 24 hours. after reaching out to this cyber security firm that was able to help me recover my stolen digital assets and bitcoin. I’m genuinely blown away by their amazing service and professionalism. I never imagined I’d be able to get my money back until I complained to Capital Crypto Recovery Services about my difficulties and gave all of the necessary paperwork. I was astounded that it took them 12 hours to reclaim my stolen money back. Without a doubt, my USDT assets were successfully recovered from the scam platform, Thank you so much Sir, I strongly recommend Capital Crypto Recover for any of your bitcoin recovery, digital funds recovery, hacking, and cybersecurity concerns. You reach them Call/Text Number +1 (336)390-6684 His Email: [email protected] Contact Telegram: @Capitalcryptorecover Via Contact: [email protected] His website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 13.10.25 01:11 elizabethrush89

    God bless Capital Crypto Recover Services for the marvelous work you did in my life, I have learned the hard way that even the most sensible investors can fall victim to scams. When my USD was stolen, for anyone who has fallen victim to one of the bitcoin binary investment scams that are currently ongoing, I felt betrayal and upset. But then I was reading a post on site when I saw a testimony of Wendy Taylor online who recommended that Capital Crypto Recovery has helped her recover scammed funds within 24 hours. after reaching out to this cyber security firm that was able to help me recover my stolen digital assets and bitcoin. I’m genuinely blown away by their amazing service and professionalism. I never imagined I’d be able to get my money back until I complained to Capital Crypto Recovery Services about my difficulties and gave all of the necessary paperwork. I was astounded that it took them 12 hours to reclaim my stolen money back. Without a doubt, my USDT assets were successfully recovered from the scam platform, Thank you so much Sir, I strongly recommend Capital Crypto Recover for any of your bitcoin recovery, digital funds recovery, hacking, and cybersecurity concerns. You reach them Call/Text Number +1 (336)390-6684 His Email: [email protected] Contact Telegram: @Capitalcryptorecover Via Contact: [email protected] His website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 14.10.25 01:15 tyleradams

    Hi. Please be wise, do not make the same mistake I had made in the past, I was a victim of bitcoin scam, I saw a glamorous review showering praises and marketing an investment firm, I reached out to them on what their contracts are, and I invested $28,000, which I was promised to get my first 15% profit in weeks, when it’s time to get my profits, I got to know the company was bogus, they kept asking me to invest more and I ran out of patience then requested to have my money back, they refused to answer nor refund my funds, not until a friend of mine introduced me to the NVIDIA TECH HACKERS, so I reached out and after tabling my complaints, they were swift to action and within 36 hours I got back my funds with the due profit. I couldn’t contain the joy in me. I urge you guys to reach out to NVIDIA TECH HACKERS on their email: [email protected]

  • 14.10.25 08:46 robertalfred175

    CRYPTO SCAM RECOVERY SUCCESSFUL – A TESTIMONIAL OF LOST PASSWORD TO YOUR DIGITAL WALLET BACK. My name is Robert Alfred, Am from Australia. I’m sharing my experience in the hope that it helps others who have been victims of crypto scams. A few months ago, I fell victim to a fraudulent crypto investment scheme linked to a broker company. I had invested heavily during a time when Bitcoin prices were rising, thinking it was a good opportunity. Unfortunately, I was scammed out of $120,000 AUD and the broker denied me access to my digital wallet and assets. It was a devastating experience that caused many sleepless nights. Crypto scams are increasingly common and often involve fake trading platforms, phishing attacks, and misleading investment opportunities. In my desperation, a friend from the crypto community recommended Capital Crypto Recovery Service, known for helping victims recover lost or stolen funds. After doing some research and reading multiple positive reviews, I reached out to Capital Crypto Recovery. I provided all the necessary information—wallet addresses, transaction history, and communication logs. Their expert team responded immediately and began investigating. Using advanced blockchain tracking techniques, they were able to trace the stolen Dogecoin, identify the scammer’s wallet, and coordinate with relevant authorities to freeze the funds before they could be moved. Incredibly, within 24 hours, Capital Crypto Recovery successfully recovered the majority of my stolen crypto assets. I was beyond relieved and truly grateful. Their professionalism, transparency, and constant communication throughout the process gave me hope during a very difficult time. If you’ve been a victim of a crypto scam, I highly recommend them with full confidence contacting: 📧 Email: [email protected] 📱 Telegram: @Capitalcryptorecover Contact: [email protected] 📞 Call/Text: +1 (336) 390-6684 🌐 Website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 14.10.25 08:46 robertalfred175

    CRYPTO SCAM RECOVERY SUCCESSFUL – A TESTIMONIAL OF LOST PASSWORD TO YOUR DIGITAL WALLET BACK. My name is Robert Alfred, Am from Australia. I’m sharing my experience in the hope that it helps others who have been victims of crypto scams. A few months ago, I fell victim to a fraudulent crypto investment scheme linked to a broker company. I had invested heavily during a time when Bitcoin prices were rising, thinking it was a good opportunity. Unfortunately, I was scammed out of $120,000 AUD and the broker denied me access to my digital wallet and assets. It was a devastating experience that caused many sleepless nights. Crypto scams are increasingly common and often involve fake trading platforms, phishing attacks, and misleading investment opportunities. In my desperation, a friend from the crypto community recommended Capital Crypto Recovery Service, known for helping victims recover lost or stolen funds. After doing some research and reading multiple positive reviews, I reached out to Capital Crypto Recovery. I provided all the necessary information—wallet addresses, transaction history, and communication logs. Their expert team responded immediately and began investigating. Using advanced blockchain tracking techniques, they were able to trace the stolen Dogecoin, identify the scammer’s wallet, and coordinate with relevant authorities to freeze the funds before they could be moved. Incredibly, within 24 hours, Capital Crypto Recovery successfully recovered the majority of my stolen crypto assets. I was beyond relieved and truly grateful. Their professionalism, transparency, and constant communication throughout the process gave me hope during a very difficult time. If you’ve been a victim of a crypto scam, I highly recommend them with full confidence contacting: 📧 Email: [email protected] 📱 Telegram: @Capitalcryptorecover Contact: [email protected] 📞 Call/Text: +1 (336) 390-6684 🌐 Website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 14.10.25 08:46 robertalfred175

    CRYPTO SCAM RECOVERY SUCCESSFUL – A TESTIMONIAL OF LOST PASSWORD TO YOUR DIGITAL WALLET BACK. My name is Robert Alfred, Am from Australia. I’m sharing my experience in the hope that it helps others who have been victims of crypto scams. A few months ago, I fell victim to a fraudulent crypto investment scheme linked to a broker company. I had invested heavily during a time when Bitcoin prices were rising, thinking it was a good opportunity. Unfortunately, I was scammed out of $120,000 AUD and the broker denied me access to my digital wallet and assets. It was a devastating experience that caused many sleepless nights. Crypto scams are increasingly common and often involve fake trading platforms, phishing attacks, and misleading investment opportunities. In my desperation, a friend from the crypto community recommended Capital Crypto Recovery Service, known for helping victims recover lost or stolen funds. After doing some research and reading multiple positive reviews, I reached out to Capital Crypto Recovery. I provided all the necessary information—wallet addresses, transaction history, and communication logs. Their expert team responded immediately and began investigating. Using advanced blockchain tracking techniques, they were able to trace the stolen Dogecoin, identify the scammer’s wallet, and coordinate with relevant authorities to freeze the funds before they could be moved. Incredibly, within 24 hours, Capital Crypto Recovery successfully recovered the majority of my stolen crypto assets. I was beyond relieved and truly grateful. Their professionalism, transparency, and constant communication throughout the process gave me hope during a very difficult time. If you’ve been a victim of a crypto scam, I highly recommend them with full confidence contacting: 📧 Email: [email protected] 📱 Telegram: @Capitalcryptorecover Contact: [email protected] 📞 Call/Text: +1 (336) 390-6684 🌐 Website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 15.10.25 18:07 crypto

    Cryptocurrency's digital realm presents many opportunities, but it also conceals complex frauds. It is quite painful to lose your cryptocurrency to scam. You can feel harassed and lost as a result. If you have been the victim of a cryptocurrency scam, this guide explains what to do ASAP. Following these procedures will help you avoid further issues or get your money back. Communication with Marie ([email protected] and WhatsApp: +1 7127594675) can make all the difference.

  • 15.10.25 21:52 harristhomas7376

    "In the crypto world, this is great news I want to share. Last year, I fell victim to a scam disguised as a safe investment option. I have invested in crypto trading platforms for about 10yrs thinking I was ensuring myself a retirement income, only to find that all my assets were either frozen, I believed my assets were secure — until I discovered that my BTC funds had been frozen and withdrawals were impossible. It was a devastating moment when I realized I had been scammed, and I thought my Bitcoin was gone forever, Everything changed when a close friend recommended the Capital Crypto Recover Service. Their professionalism, expertise, and dedication enabled me to recover my lost Bitcoin funds back — more than €560.000 DEM to my BTC wallet. What once felt impossible became a reality thanks to their support. If you have lost Bitcoin through scams, hacking, failed withdrawals, or similar challenges, don’t lose hope. I strongly recommend Capital Crypto Recover Service to anyone seeking a reliable and effective solution for recovering any wallet assets. They have a proven track record of successful reputation in recovering lost password assets for their clients and can help you navigate the process of recovering your funds. Don’t let scammers get away with your hard-earned money – contact Email: [email protected] Phone CALL/Text Number: +1 (336) 390-6684 Contact: [email protected] Website: https://recovercapital.wixsite.com/capital-crypto-rec-1

  • 15.10.25 21:52 harristhomas7376

    "In the crypto world, this is great news I want to share. Last year, I fell victim to a scam disguised as a safe investment option. I have invested in crypto trading platforms for about 10yrs thinking I was ensuring myself a retirement income, only to find that all my assets were either frozen, I believed my assets were secure — until I discovered that my BTC funds had been frozen and withdrawals were impossible. It was a devastating moment when I realized I had been scammed, and I thought my Bitcoin was gone forever, Everything changed when a close friend recommended the Capital Crypto Recover Service. Their professionalism, expertise, and dedication enabled me to recover my lost Bitcoin funds back — more than €560.000 DEM to my BTC wallet. What once felt impossible became a reality thanks to their support. If you have lost Bitcoin through scams, hacking, failed withdrawals, or similar challenges, don’t lose hope. I strongly recommend Capital Crypto Recover Service to anyone seeking a reliable and effective solution for recovering any wallet assets. They have a proven track record of successful reputation in recovering lost password assets for their clients and can help you navigate the process of recovering your funds. Don’t let scammers get away with your hard-earned money – contact Email: [email protected] Phone CALL/Text Number: +1 (336) 390-6684 Contact: [email protected] Website: https://recovercapital.wixsite.com/capital-crypto-rec-1

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