Nvidia轉軚?光學數據傳輸技術加持,但GPU暫未有份!

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Nvidia 擁抱光學數據傳輸技術 – 但暫時不會用於 GPU

這些芯片的能效將是其前身的三倍半。

Nvidia 的 CEO 黃仁勳最近談到了共包光學技術的可靠性,這是一種使用激光光線在芯片之間傳輸數據的技術,並探討了該技術在公司旗艦 GPU 中的潛在應用。在公司的年度開發者大會上,黃仁勳指出,儘管共包光學技術在能效和速度上優於傳統銅連接,但目前尚未足夠可靠,無法在 Nvidia 的 GPU 中廣泛使用。

這一可靠性差距相當顯著,黃仁勳告訴一群記者,銅連接的可靠性「是當前共包光學連接的幾個數量級」更高,因此仍然是 Nvidia GPU 的首選。

然而,Nvidia 正在探索將共包光學技術應用於更專門的應用。黃仁勳表示,公司計劃將該技術整合到兩款為其伺服器上設計的新的網絡芯片中。這些芯片預計將於今年晚些時候及 2026 年推出,其能效將是前任產品的三倍半。這標誌著該技術向前邁出了一大步,儘管是在可靠性要求較低的利基應用中。

Nvidia 在硅光子學方面也取得了重大進展,上周推出了 Quantum-X 和 Spectrum-X 網絡交換機。這些交換機在大規模上將光學通信整合到電子電路中,使 AI 工廠能夠在多個地點連接數百萬個 GPU,同時減少能耗和運營成本。

Nvidia 聲稱,這些光學創新使用的激光數量比傳統方法少 4 倍,卻能提供 3.5 倍的能效,63 倍的信號完整性,10 倍的網絡韌性,以及 1.3 倍更快的部署速度。

黃仁勳強調了新網絡交換機的重要性,他表示:「AI 工廠是一種新的數據中心,具有極大的規模,網絡基礎設施必須重新設計以跟上步伐。」通過將硅光子學整合到交換機中,Nvidia 正在推動超大規模和企業網絡的可能性,為「百萬 GPU AI 工廠」鋪平道路。

行業對光學技術的轉變,是因應傳統銅連接所帶來的日益增長的能耗和熱量問題。隨著 AI 計算需求的增長,Nvidia 及初創企業 Ayar Labs 等公司正探索如何使共包光學技術更可靠和更具成本效益。Ayar Labs 的 CEO Mark Wade 告訴路透社,儘管共包光學技術的廣泛使用可能要等到 2028 年或更晚,光學技術對於建立更大伺服器是必不可少的,因為它不再受限於銅的局限性。他表示:「看看電氣連接的機架上不斷上升的能耗,光學是唯一能讓你擺脫這種困境的技術。」

這篇文章揭示了Nvidia在光學數據傳輸技術上的探索,雖然目前仍然不適用於其高性能的GPU,但未來的潛力無疑是巨大的。隨著AI和數據中心需求的增長,光學技術的發展將成為解決傳統銅連接限制的關鍵。這不僅是技術的演進,更是對未來計算架構的一次革命性思考。Nvidia的策略顯示了他們在保持現有技術優勢的同時,試圖引領光學技術的未來發展,這一點值得其他科技公司借鑒。

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