What makes the graphic card capacitor to blow up?

[jacktesterson]

I've never had this happen luckily ...

 

[sylvesp]

The main killer of electrolytic capacitors is heat. Capacitors running in a hot environment are more likely to fail. But heat can also be generated inside the capacitor. The job of the capacitor is to store electrical charge. Moving electrical charge is current. So a drop in power supply voltage (or in increase in current demanded by the circuit board) will cause the capacitor to supply some of its charge to the circuit board in order to maintain constant voltage. But the capacitor is not a perfect conductor! It has internal resistance and so that current flow generates heat. When the supply voltage comes back up (or the current demanded by the circuit board decreases) the capacitor charges back up. Again, the internal resistance will turn some of that energy into heat. This current is sometimes referred to as ripple current and there typically is a specification for this for each capacitor.

Exceeding the voltage rating of the capacitor will cause it to fail. Cooking the capacitor will cause it to fail. Excessive ripple current will cause it to fail. An inadequate PSU may cause higher ripple current leading to eventual failure. A poorly chosen capacitor (for a particular application) will lead to early failure. And a capacitor with a latent defect (poorly made, bad batch, deffective seal, total junk etc) will likely fail long before it should.

And none of this helps you with your card I am sorry to say. You may be able to change out the parts and depending upon the acutal failure cause, your board might still be alive. Best bet is to return it to the manufacturer but do not ignore the hassle factor. Sometimes it is best to just put the card out of its missery, eat the loss, and read carefully about registering your next card after you get it, just like I always..................... somehow neglect to do!