The pentium D can run the game fine and has done for many years either on LAN or on line, it is running XP Home with 4GB memory (3.5 Gb useable) and it had a low level Gfx card in , I've just replaced it with a more poweful X1950 pro I had kicking around just too help, but it's not fps anyway it's lag in the game.
We used to use the in game ESO.com matching service but now use www.voobly.com.
So a 2v2 game with 3 others around the world runs fine, with two pc's here this one lags badly, it maybe that this one connects last to the game as it is a slower processor etc, so the issue is a
second pc not this PC i guess.
The voobly site talk about enabling/disabling Upnp and NAT traversal, the HH3 does not seem to be so user friendly.
I can port forward but only to one PC ?