CPU 和風(fēng)扇是否正常運轉(zhuǎn)并足夠制冷
當(dāng)CPU風(fēng)扇轉(zhuǎn)速變慢時，CPU本身的溫度就會升高，為了保護CPU的安全，CPU就會自動降低運行頻率，從而導(dǎo)致計算機運行速度變慢。有兩個方法檢測CPU的溫度。你可以用“手指測法”用手指試一下處理器的溫度是否燙手，但是要注意的是采用這種方法必須先拔掉電源插頭，然后接一根接地線來防止身上帶的靜電擊穿CPU以至損壞。另一個比較科學(xué)的方法是用帶感溫器的萬用表來檢測處理器的溫度。
因為處理器的種類和型號不同，合理溫度也各不相同。但是總的來說，溫度應(yīng)該低于 110 度。如果你發(fā)現(xiàn)處理器的測試高于這處溫度，檢查一下機箱內(nèi)的風(fēng)扇是否正常運轉(zhuǎn)。
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、USB和掃描儀造成的影響
由于Windows 啟動時會對各個驅(qū)動器（包括光驅(qū)）進行檢測，因此如果光驅(qū)中放置了光盤，也會延長電腦的啟動時間。所以如果電腦安裝了掃描儀等設(shè)備，或在啟動時已經(jīng)連接了USB硬盤，那么不妨試試先將它們斷開，看看啟動速度是不是有變化。一般來說，由于USB接口速度較慢，因此相應(yīng)設(shè)備會對電腦啟動速度有較明顯的影響，應(yīng)該盡量在啟動后再連接USB設(shè)備。如果沒有USB設(shè)備，那么建議直接在BIOS設(shè)置中將USB功能關(guān)閉。02S10SSSNSNSSNS - FOXBORO
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