I consistently get these BSOD, when i am playing games, browsing internet or any other activities..I've switched onto new motherboard it's from American Megatrends..my previous motherboard haven't raised BSOD in its lifetime

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I don't know where the fault lies..i even tried win xp..but this same error persists..
Please help me about this thing.. i really have some important work and i need my PC badly..
Thanks in advance.