ROBOT.LK

I was experiencing frequent lockups with my computer recently. I checked the PC today. I only checked the graphics card since I got lot of blue screen errors with the nVidia driver lately. And it turned out to be 3 blown capacitors on the card. I am attaching 2 photos. There is 1500 on the capacitors. I guess it means that they are 1500uF. But where to find these caps?.

[media]http://www.youtube.com/watch?v=PkPosNLZg04[/media]

I have added an article about some common types of caps in motherboards and VGA cards. See Capacitor types in motherboards and VGA cards.

It is a bit hard to identify the type of caps you have but since the blue one which looks like it has escaped some gas through vents, I guess those are just wet electrolytic. If that is the case, you can simply replace with normal type.

In case those are not (Polymer type), you can try replacing them with double capacity wet electrolytic as polymers can be hard to find in local shops.

I replace the blown capacitors with normal wet electrolyte type. The card is working fine now. The capacitors on the card that were there were wet electrolyte ones in aluminium casing.

I could not find FZ75 capacitors and instead i bought FZ95 from ebay. Replaced all of the capacitors.
But I had to lower the GPU core voltage from 1.15Volts to 1.00 Volts and Core Clock to 300MHz from 400MHz. Also memory to 300Mhz from 333MHz. Now it is running stable.
Without under-volting and under-clocking , it freezes at the slightest load on the GPU. I think it is due to poor power supply to the GPU and RAM after i repaired the VRM.