For what it's worth, I was playing Unreal 2 with every effect turned on "high" and I didn't experience a single bit of stutter, frame droppage, or tearing. Everything worked perfectly.
Really? Hmm. I've got exactly the same system as you (1.4Ghz, GeForce 3, 512, etc), and I had to run it at 800x600 with about medium detail, except that bit in the middle with the laser that was reflecting off those conveniently placed blocks (!), when I had to go down to 640x480 and low level... I must be doing something wrong This comment was edited on Jul 30, 03:22.