The newest Trinity patch is 1.34, and things run pretty well given that your computer is decent. There are still annoying minidumps now and then though.

Well if you play games for more than a few hours, of course you're going to run into serious problems, especially in large maps. Games aren't supposed to take that long. This is a real-time strategy game, not Galactic Civilizations... that said, minidumps are somewhat more uncommon from how they were before, so I've heard, and desyncs are extraordinary rare nowadays.

Trinity takes significantly less memory to run and quite a few memory leaks and unnecessary cpu cycles have been fixed than pre 1.2. That being said however, a strong CPU is still highly recommended as that directly affects the quality of the game. I regularly on normal settings run the game for 6-8 hours without any issues. When you start increasing the game speed you increase the cycle load on the CPU which slows the game down sooner.