巴哈看到有人用皇鈦極冒火花 - 3C

By Emma
at 2016-07-24T20:27
at 2016-07-24T20:27
Table of Contents
※ 引述《Khadgar (Khadgar)》之銘言:
: 在小弟看來為了3~5W 所犧牲的餘裕大概就是這種狀況
: 要正面論述, 頂多就400W比較精省, 600W比較保守, 根本沒有明顯優劣
好啦, 來講詳細一點的。 orz
-----
好比Be quiet STRAIGHT POWER 10 (E10),
500W版 是12V四路各18A,
800W版 是12V 20A*2 + 24A*2
如果你今天有一個元件失效, 導致一個 0.8ohm 阻抗的對地short,
那就是 15A (12/0.8=15) ;
如果原本該路上就有8A (好比CPU, 96W應該算合理),
那麼 8+15 = 23 > 18, 500W版 跳OCP的機會就比較高
8+15 = 23 < 24 800W版 就不會跳OCP
-----
這就是為什麼我不建議買太大瓦PSU的原因....
餘裕越多, 出事時越好燒....
畢竟引發短路、擊穿的那個狀態,
你永遠無法預測阻抗值會是多少、實際會帶來多少電流
-----
那麼皇鈦極這部分我沒注意到的是,
他450W 跟 650W 都是標 12V四路 18A,
是他標示省略過、他背後每路OCP實際上訂不一樣,
還是真的每款每路都是18A, 這我就不得而知了。
如果說他真的每路OCP都以18A為標準, 那OCP保護差異就不大了。
這是我沒注意到的地方。
-----
我想我這篇解釋的應該夠清楚了吧 orz
--
: 在小弟看來為了3~5W 所犧牲的餘裕大概就是這種狀況
: 要正面論述, 頂多就400W比較精省, 600W比較保守, 根本沒有明顯優劣
好啦, 來講詳細一點的。 orz
-----
好比Be quiet STRAIGHT POWER 10 (E10),
500W版 是12V四路各18A,
800W版 是12V 20A*2 + 24A*2
如果你今天有一個元件失效, 導致一個 0.8ohm 阻抗的對地short,
那就是 15A (12/0.8=15) ;
如果原本該路上就有8A (好比CPU, 96W應該算合理),
那麼 8+15 = 23 > 18, 500W版 跳OCP的機會就比較高
8+15 = 23 < 24 800W版 就不會跳OCP
-----
這就是為什麼我不建議買太大瓦PSU的原因....
餘裕越多, 出事時越好燒....
畢竟引發短路、擊穿的那個狀態,
你永遠無法預測阻抗值會是多少、實際會帶來多少電流
-----
那麼皇鈦極這部分我沒注意到的是,
他450W 跟 650W 都是標 12V四路 18A,
是他標示省略過、他背後每路OCP實際上訂不一樣,
還是真的每款每路都是18A, 這我就不得而知了。
如果說他真的每路OCP都以18A為標準, 那OCP保護差異就不大了。
這是我沒注意到的地方。
-----
我想我這篇解釋的應該夠清楚了吧 orz
--
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