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So i opened my old acer laptop to clean it, to find that the cpu is upgradable, its an intel t4500 2.3ghz, the best upgrade with the same TDP and socket is
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New CPU and GPU Cooling Fan Aspire V5-471 V5-471g V5-531 V5-531g V5-571 V5-571g V5-571p CPU Fan - China 23.10704.001 and 60. M2en1.002 price | Made-in-China.com