You’re looking at the heat sink to an ATI Radeon X1600xt video card. The cooling fan failed, causing the chip to overheat and the heat sink to delaminate. The heat sink is soldered copper; lead-free solder melts at around 450 degrees Farenheit. You can tell that it actually melted and didn’t just weaken and break by the fact that there are strands between the heatsink and its base where it became liquid and flowed as the parts separated.
What’s remarkable is that this card still works. It shuts down after a few minutes of operation when it overheats, but it got hot enough to melt solder and still works. The Radion X1600 only pulls about 40 watts at peak 2D operation; it was the fact that the heat couldn’t go anywhere that caused it to mount up.
Next up; carbon nanotube or diamond chips that can run at much higher temperatures. But they’ll need entirely different kinds of heat sinks. Soldered copper clearly won’t cut it.