Maybe on the core, but the ram might be difficult because the Geforce3 uses slower nano-second ram which means the max theoretical speed will be slower than that of a Ti500. But if you put some ram sinks on it and a Tt Crystal Orb, you might be able to reach Ti500 speeds.
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Scratch that nano-second ram crap, the Geforce3 uses the same ns ram. However, it is the core that you should be careful on. The Titanium series uses the .15micron manufacturing process which means smaller size, less heat generated. That is how the Ti500 is able to reach 240 safely