Tested: 64-Bit P4 -
PCWorld compared two of the new chips, the 3.73-GHz P4 EE and the 3.6-GHz P4 660, with a 32-bit 3.8-GHz P4 (the fastest 32-bit P4), a 2.6-GHz Athlon 64 FX-55, and a 2.4-GHz Athlon 64 3800+. Results are mixed: You'll get a slight boost over a 32-bit P4, but you will pay about $100 to $200 more for an Intel PC than for an AMD one with similar or slightly better performance.