Hallo,

I have got Nvidia Quadro FX580 which has a strange mode of failure. During my heat-gun stupid madness some time ago I reflowed the chip. 🫣 But the problem is still the same. Now I am trying to save the card and have found there is a missing (very probable) smd capacitor related to ADP3208 buck convertor.
See photos - pin PGND2 i think is the one that is missing the capacitor. Can ´t figure out the value.
The card runs and in most cases boots in to Windows, but if start a stress test (3D mark) it crashes in a minute or two. Usually there is a purple screen or the PC just stuck. (Strange is that 3DMark ceash always, but FurrMark had been running 10 minutes with no problems - I stopped it than)
There is a but of audigable noise from power stage when under load but it might be just a coil whine and not a failure.
The first try would be replace the capacitor - but what value? Any help will be appreciated.