舊機顯卡升級後之謎團

小弟喺幾個月之前終於頂唔順幻燈片式嘅遊戲,將顯卡從gtx260+升級到gtx750ti。啱啱換完嗰時,玩bf3大型征服直情係smooth as silk,bf4征服就勉勉強強過得去。
但從上幾個禮拜開始,玩征服開始勁lag(10fps以下),Rush(地圖稍微細啲)幾lag,Team DM(細圖)都只係勉強玩得過去。
好似比起gtx260+更差喎!點解會咁?係唔係CPU太老,帶唔起張卡?如各位師兄有任何解決方法,請盡量協助小弟,感激不盡!

CPU: core 2 quad Q9400
motherboard : Asus P5Q SE
4 * 2G DDR2-800
五年歷史嘅1TB+2TB HDD
Tt 450w power
Windows 7 Ultimate 64-bit

Cpu 唔夠力

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對上一次清塵換膏幾時? 好大可能係網速差, 或者過熱而慢落黎

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also check if your hard disks are almost full

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網路方面,測過ping同速度,冇問題。今晚我會拆開台機清下塵,多謝指點

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Only 15% of the space left. The Steam and Origin folder take more than 500G. Will the performance be better if I add a SSD and move the major games into it?

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OC到3Ghz會唔會有幫助?

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会否MB PCEiX?有關?

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