PC Problem

[Beauenheim]

Your fan is no longer working?
If the fan isn't working, the card will overheat, no matter what your airflow situation is like, the heat needs to be pulled away from the chip and blown away from the card.

Try reinstalling windows, or loading a restore point from when the fan did work, since I'm 90% sure that overheating is infact the problem if the fan isn't working.

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[zalsrevenge]

The fan doesn't work. This will cause overheating, even when you're on idle. That's why you're getting the blinking post code.

Usually there's a little power cord that goes from the GPU fan to the PSU. That might have unplugged somehow.

I recommend going into the BIOS and see if the GPU fan is on. Usually it will tell you.

If the GPU fan is plugged in and the BIOS says the fan isn't working you need a new video card. Of course there's a multitude of possibilities considering why the card isn't working, but these are most likely the issues.

[Govedo13]

Download SpeedFan,adjust the sensors, put your normal working temps according to the card manufacturer :https://www.youtube.com/watch?v=8VjdQStihsE
and check the temps, the card might be overheating if the fan is gone. If this is the case replace the headsink or install one 120mm using cable strips over it. Check with SpeedFan again.

Second option is that the card starts to die- do you get blue screens, hardware errors and strange monitor artefacts like this:
http://www.bloodys.com/wp-content/upload...efacts.jpg
http://imageshack.us/photo/my-images/127...edcs0.jpg/

If this is the case you need to bake your card in the oven I am not kidding the Card manufacturers are not soldering the ram chips properly in order that after some usage they loose connection and the card starts to appear that is is broken even if it is 100% ok.
Remove head-sink, all plastic stuff of the card together with all papers stuff too, take some aluminium folio and make 4 balls out of it to put the card on them:
https://www.youtube.com/watch?v=DmzGnjJNZrM
Note that 180c could be a bit too much if it still works so you might only heat your oven to 180° and then turn it of putting the card there shortly- then try if it works normally if not repeat. I fixed 2 old cards like that-they continue to work flawlessly till today.

If the fan isn't working, the card will overheat, no matter what your airflow situation is like

This is wrong.
I had old 3870 without working fan with proper case airflow and it worked under full load without problem. 3-4 120mm proper fans do a lot more then one single 70-90mm fan even if they are not at the card, the headsink and the thermal paste( the difference between: 40-20+C- no paste,+10 C bad paste, -5/10 C Indigo/Phobya/AC7 pastes) do the cooling of the components a lot more then the fan over it. The fan over it cools the headsink and you can cool it without a problem with case fans only if you got proper airflow. Good liquid piped headsinks also can cool without fans on it full passive pc is possible if you does not want some mega highend specs. However proper case airflow allows the components to live longer.

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Official faction players that are often accused of elitism, never deploy them and have those weird, immersion killing "fair fight/dueling" suicidal hobbies. (yes, i've seen enough of those lolduels, where house military with overwhelming force on the field willingly loses a pilot in a duel. ffs.)