Yup - run the game totally stock for a while before I knew there was a 1.4 patch
Now run with 1.4 and have had no problems on my AMD 2800+, 1GB PC3200 RAM, ATI 9825 128MB card

- still playing the training missions (I don't get to play that often) and love this game to bits. The atmosphere, suspence etc is cool, and the graphics even on my modest PC are fantastic, love the way the ships lift up out of the water when hit by a torp

- can't see why I would need to mod this version as it's very realistic (SHII was a different story !)