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雪白款式的電源供應器在市面上並不常見，如果還要符合 ATX 3.0 規範幾乎是要提著燈籠找了，這次介紹的技嘉 GIGABYTE UD850GM PG5 ATX3.0 就是定位在中階等級，提供最新世代 ATX3.0、PCIe 5.0 規範、16pin 12VHPWR 輸出，同時提供雪白配色款式，用親民的價格就能擁有不錯的電源供應器。
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GIGABYTE 的 UD 系列電源供應器主打特色之一就是高 CP 值，UD 系列符合 ATX 3.0 與 PCIe 5.0 規範，通過 80PLUS 金牌認證，提供 850W、1000W 與1300W 三種功率的電源供應器，滿足不同需求的玩家，這次介紹的是 850W，適合顯卡使用 NVIDIA GeForce RTX 4070 等級的玩家使用。
同為白色的線材採用全模組化設計，組裝時機殼內部更為簡潔，雖然是價格親民產品，散熱方面也不馬虎，風扇搭載 120mm 液壓軸承風扇，擁有優秀的散熱且低噪音特性，並提供原廠 5 年保固服務，還有完整安全保護機制，讓玩家在玩遊戲的時候無任何後顧之憂！
UD850GM PG5 白色款除了模組線材外，連 24pin 主電源線也是白色的，就是要白的徹底。模組化線材包含 24pin 主機板電源、8pin CPU 電源兩組、12VHPWR 電源、8pin PCIe 電源四組、SATA 電源八組、傳統大 4pin 三組與軟碟機電源，基本上要安裝各種硬體都非常足夠，線材長度也很合適。
UD850GM PG5 搭載液壓軸承風扇與智能風扇轉速設計，低負載時風扇是停轉狀態，達到零噪音境界，側邊有 Ultra Durable 字樣，內部採用日系主電容，且強化散熱方案，提供穩定的電力輸出與低溫低噪音表現，12V 是單路輸出，即便是多顯卡安裝也不用擔心電流問題。
比較特別的是 12VHPWR 可支援到 55A，有獨立標示提供 660W（線材接頭標示 600W），也代表著輸出功率掛保證。此外，模組化線材接頭面都有標示對應功能，安裝時不容易搞混，新手友善值得鼓勵。
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UD850GM PG5 符合 ATX 3.0 規範，所以最重要的就是12VHPWR，可直接與 NVIDIA GeForce RTX 40 系列的中高階顯卡連接使用，安裝時一定要平行安裝插入，且確認按壓穩固，接頭底部不可有任何縫細，才能避免接觸不良或燒毀的可能性。
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燒機測試
測試平台
處理器：AMD Ryzen 9 7950X
散熱器：COUGAR POSEIDON ELITE 360
主機板：ASUS TUF GAMING B650-PLUS
記憶體：T-FORCE VULCANα DDR5-5600 32GB kit
顯示卡：NVIDIA GeForce RTX 4080 16GB
儲存裝置：WD Black 1TB NVMe SSD
電源供應器：GIGABYTE UD850GM PG5
作業系統：Windows 11 專業版 64 Bit
這次直接拿 GeForce RTX 4080 測試，搭配 OCCT 進行燒機，時間為 30 分鐘，前 5 分鐘與最後 5 分鐘讓系統閒置，中間 20 分鐘是系統燒機，閒置時功率為 70.28W，燒機時總功率約 661.80W。
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低負載功率 70.28 W
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燒機高負載功率 661.80 W
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燒機 20 分鐘過程中 3.3V 電壓在 3.31~3.33V 之間跳動，平均電壓落在 3.32V，壓降只有 0.3%；5V 電壓待機與燒機完美表現，基本是一直線在 5.02V， 12V 待機與燒機過程電壓則約在 12.0775~12.175V 之間跳動，整體輸出表現相當穩定。
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3.3V 輸出，電壓約在 3.31~ 3.33V之間，平均 3.32V。
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5V 輸出，電壓基本穩定在 5.2V。
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12V 輸出，電壓約在 12.0775~12.175V 之間。
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總結
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GIGABYTE UD850GM PG5 ATX3.0 80PLUS 金牌全模組化電供應器價格漂亮親民，具備高 CP 值特性，輸出表現也有一定水準。本次測試燒機總功耗約 661.80 瓦，3.3V 壓降只有0.3%，5V 完美演出，12V 則是小幅度區間跳動，就算搭配高階的 GeForce RTX 4080 顯示卡也一樣能輕輕鬆鬆應付。
另外在燒機過程風扇非常安靜，電源供應器外殼溫度幾乎與室溫差不多，搭載 120mm 風扇就非常足夠，還有智能風扇轉速設計，讓玩家可以同時享受低溫與低噪音這兩大優勢。
今年如果想升級電腦或更新電源供應器的玩家們，不妨參考這款高 CP 值的 GIGABYTE UD850GM PG5 ATX3.0 80PLUS 金牌全模組化電供應器！
Model：余納斯
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