hi i have a acer n1996 motheboard with a dualcore cpu 775 socket ive tryed putting a quad q8200 rund for 30 mins then locks tryed new cooler but still the same put old chip back in and its fine just dont understand how it is ok for half hr then the whole pc locks and i must turn it of and on again is it a bad chip? or cant by board take this chip please help cheers