RTX 5070挑機4090?規格比拼,效能真係咁勁?

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Nvidia聲稱RTX 5070性能可媲美RTX 4090 — 讓我們看看規格

Nvidia在宣布其RTX 50系列顯示卡時做出了一些驚人的聲明。它承諾其最新的顯示卡RTX 5090將提供雙倍的性能,並直言不諱地表示較為低調的RTX 5070性能可以與上一代的王者RTX 4090相提並論。即使在新硬件的熱潮中,這一說法仍然讓人感到懷疑。

在這些新卡的評測禁令解除之前,我們無法正式確認或否定這些聲明,但目前我們可以考慮RTX 5070與4090的性能比較,以便對其表現有個大致的預期。

定價和可用性

Nvidia RTX 4090於2022年10月首次亮相,當時的價格高達1,600美元。此後,該卡的價格一直保持在這個水平,但由於供應短缺,某些版本的價格一度飆升至2,000美元以上。不過截至2025年1月底,這款顯示卡幾乎在所有地方都已售罄,只有價位高達2,500美元的版本仍在出售,而二手版本的價格約為1,600美元。

RTX 5070預計將於2月某個時候上市,較可能是在月底而非月初。Nvidia建議的零售價格為550美元,比RTX 4070 Super首發時的價格低50美元,但根據庫存和早期需求,發售初期的價格可能會更高。

規格

| | Nvidia RTX 5070 | Nvidia RTX 4090 |
|——————|——————|——————|
| CUDA核心 | 6,144 | 16,384 |
| RT核心 | 未知數量,第四代 | 128,第三代 |
| Tensor核心 | 未知數量,第五代 | 512,第四代 |
| 最大時鐘 | 2.51GHz | 2.5GHz |
| 記憶體大小 | 12GB GDDR7 | 24GB GDDR6X |
| 記憶體總線 | 192-bit | 384-bit |
| 記憶體速度 | 28Gbps | 21Gbps |
| 記憶體帶寬 | 672GBps | 1,008GBps |
| TBP | 250W | 450W |

從數據上看,Nvidia聲稱RTX 5070可以媲美RTX 4090的性能幾乎顯得滑稽可笑。它的記憶體帶寬少了三分之一,物理記憶體僅有一半,CUDA核心數量也僅有三分之一,且其提升時鐘速度相當接近。

這是因為Nvidia的聲明主要基於對最新一代Tensor核心的AI驅動升級支持。Nvidia的新RTX 50系列支持多幀生成,可以在單個GPU渲染的幀周圍構建最多三個AI生成的幀。而RTX 4090則僅支持單個AI幀作為其DLSS 3的一部分。這確實在兼容遊戲中大幅提升了幀率,但可能在原始數字上讓上一代的王者顯得落後,儘管對於如此多AI生成幀的可行性仍有疑慮。

不過,撇開懷疑的帽子來看,RTX 5070的功耗明顯低於RTX 4090,因此產生的熱量也少得多。這使得它更適合小型遊戲PC,尤其是如果它的新架構、製程節點以及DLSS 4支持能幫助它縮小與4090的性能差距。

性能

在我們自己測試RTX 5070之前,我們無法確定這款下一代顯示卡的實際表現如何,也無法評估它與RTX 4090的比較。雖然我們可以利用Nvidia的幻燈片和聲明來給出大致的估算,但由於DLSS的強調營銷,我們應該對達到這些數據的升級有所警惕。

Nvidia的圖表告訴我們的資訊,其實比最初看起來要多。雖然RTX 5070聲稱比RTX 4070的性能翻倍,理論上可以與RTX 4090相提並論,但我們應該更關注圖表左側的兩個結果。

在《Horizon Forbidden West》和《Resident Evil》中,使用DLSS 3和不使用DLSS的情況下,我們看到一代與下一代之間的性能提升相當有限。實際上,RTX 5070的性能可能僅比RTX 4070快不到20%。如果是這樣,則需要DLSS 4和多幀生成的巨大提升才能接近4090的性能,更別提要與之匹敵。

我們需要等到實際測試出爐來解決這場性能辯論,但乍一看,5070在大多數遊戲中能夠匹敵4090的可能性非常小。即使如此,這也將依賴於大量的多幀生成,這可能會引入延遲問題和視覺瑕疵,而這對於所有玩家來說可能並不是理想的選擇。

靜待觀察

距離我們了解RTX 5070究竟有多強大,只有一個多月的時間。它可能會比RTX 4070更快,而新的DLSS功能在某些情況下使其更具能力。然而,它不太可能與RTX 4090相媲美。如果你已經在使用這款上一代的王者卡,則要小心新一代的FOMO(錯失恐懼)。你可能仍然擁有世界上最快的顯示卡之一,並且在相當長一段時間內都能繼續使用。

在這篇文章中,Nvidia的勇敢聲明無疑給了消費者對新顯示卡的期待,但同時也反映出當前顯示卡市場的競爭激烈。在技術日新月異的今天,消費者不僅需要關注性能數據,還要考慮實際使用場景中的表現。對於那些對遊戲性能有高需求的玩家而言,選擇合適的顯示卡將成為決定遊戲體驗的關鍵。

以上文章由特價GPT API KEY所翻譯及撰寫。而圖片則由FLUX根據內容自動生成。

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