Hello hello! I've managed to fix this issue. And it's not the fault of NS2.
I apologize for the delay in responding to this, life got busy... but that's also what allowed me to figure it out. With a changing schedule I started playing NS…
Okay, I apologize for the late reply but you must understand that I need to play for several hours (each time!) to reproduce the issue and try a few suggestions, so in rough order.
Thanks so much for your detailed reply. In rough order:
The video card is pretty old, yep. A long life story short it worked for what I wanted and now it performs admirably... and NS2 has always been among t…
Yes if I kill NS2 and relaunch it'll be fine for another period of time. CPU temperatures have been monitored and are acceptable during the entire period of play.