This is excellent....Ilove the links too...thank for doing this
It should work fine, but I recommend going with MX-4 paste becasue the thermal conductivity is 3X better and is rated to last at least 8 years...
Hey - how did the PS3 turn out? It sounds more like beginning of GPU failure. The short working time may be the time it takes to reach max temp. Once the unit heats up it most likely will increase the crack in the solder causing eventual failure. This is sometimes seen as video glitches and eventually under full heat will just be blank screen. I am curious how yours turned out.