How can video card manufactures tell if the card had been overclocked?

I had a 7300LE for little over a year and the fan on board had failed and i had overclocked it and want to send the card in for replacement|||There is a couple ways the manufacturer can find out. One is simply inspecting the card and seeing that the GPU shows signs of overheating. The temperature of the GPU increases as you overclock, and if it melts or shades, the manufacturers will know.



You BIOS of your motherboard keeps hidden log files of frequencies and adjustments. If the manufactures got a hold of your computer (you sent it back to them), they could check those log files and see if you messed with any values.



Most of the newer cards you can overclock without voiding your warranty (obviously if you send back a melted card, they won't replace it). If your interested, the 7300LE won't overclock very well, and if you do overclock, you won't see much of a performance boost. The card isn't meant for cranking out power and the heatsinks won't keep it cool enough. This could cause serious damage if it overheats by overclocking it. |||They can't. The only reason a manufacturer would deny you a new card would be if you volt modded or replaced the default heatsink and fan with a third party heat sink and fan. They cannot tell if you have overclocked it.|||Heat damage.