GTS 250 crush at 80º C

Hello, i have a xfx gts 250 512 MB, and when GPU temperaure gets to 80º C in Call of duty world at war, the video card fan goes to full speed and the card stop giving video signal, but PC still ON and video card fan ON too, i just restarted. Then i thought it was power supply, but i took from internet the program to put fan speed manually and put 100% (maximum speed), go into call of duty and it delays a lot, but finally crush, but i didn´t record the temperature, i suppose it was on 80º C again, i´m going to check it today. It doesn´t look like power supply because the fan is in 100% speed since i enter the game. Does the video card is factory adjusted to automatic stop video signal above 80ºC?
my room temperature is 30ºC
Please help... Thank you.

Hi and welcome to the forum :).

I'd get more airflow through the case tbh (run with the side off for a while to prove if more air flow would help?) as i have that card and it quite happily sits folding all day at around 60-80c with the fan only running 70% or so.

thank you for the welcome
my case is open, but do u know if ur gts 250 gets to 80ºC some time?
is important to me to know that because ur card get to 80 and more without any problem, then i need to go changing my video card, i'm still on time
thanks for answer me

Pretty sure it approached 80c, not sure if it actually went over 80c though, but never had any issues with it at those temps and i am certain the fan wasn't running at 100%.

Your room temp is somewhat higher than it is here though so that might have some bearing on things.