同一牌子電源供應器500W或380W接到同一個耗電總瓦數250W的主機,
500w電源供應器消耗的能量及散發出來的熱, 會比380w電源供應器多嗎?
如果拿海韻S12II-500跟S12II-380比?
二個都是 80PLUS銅牌
但頂多差到7.5W,
輸出250W時剛剛好落在S12II-500輸出50%時的最佳效率區(效率85.80)。
S12II-380
S12II-500
如果是5V或3.3V輸出佔大部分的極端狀況,
也許會不一樣。
S12II-500 eff=85.8% in 50% loading, AC input is 291.4W for DC output 250W.
Wastes power is 41.4 and becomes heat.
250W loading on 380W PSU = 66% loading (around)
S12II-380 eff=84.5%(around) in 66% loading, AC input is 295.8W for DC output 250W.
Wastes power is 45.8 and becomes heat.
For your money, choose 380W.
For our earth, choose 500W.
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