I played GTA IV under the summer when it was incredibly hot and got a couple of overheating warnings from my xbox, I decided to cool it off with fans (dunno if thats good but whatever) and it died a couple of weeks after.
I don't blame GTA IV (Which was the only game that got crashes), there's nothing to blame it on.
I had the xbox for 2 years, and this was one of the early models.
Not a single RROD did I have until that summer with GTAIV.
Point is, your PS3 might be old or you might have mistreated it or something?