Today I find myself mourning the death of my GTX 590 :(
Yesterday I was playing Rome II. On some of the maps I was getting some severe artefacting, I thought 'it's just Rome II, I'm only getting it on the occasional map.
Anyway a couple of hours later my system completely locked up and needed a full system restart to get it running again, well actually it took a few attempts and a system restore but I got it back into Windows but I didn't go back to Rome II. Today powered up my machine and it just would not boot fully, so I nicked the 560ti from my wife's machine and everything is fine again.
I can't complain though I got the GTX 590 for free a couple of years ago after it was written off with fire damage and I should now have a shiny new GTX 780ti by Wednesday. (though this time it's not free)
I've been lucky though, I've been building PC's since 1990 and had very few hardware failures. Anyone else had catastrophic system deaths and what died on you?