All i740 cards use the agp protocol.
Even if you tell them not to, and will use system memory even there is no need. small textures, as well as large clog the cpu.
I remember seeing i740 on a amd, with Jedi knight, and setting no agp made no difference to the system every 1.5 seconds or so, the screen would freeze, and over all it looked a bit jerky.Imagine playing Doom on a 486 at 25mhz., in a win95 dos box. that was how it was. If you go AGP, make sure your cpu is not left fighting for bandwidth!