Experience with AMD 64-bit CPUs reveals mixed opinions, particularly regarding their utility for Windows users. While some argue that 64-bit processors are beneficial for Linux, others suggest that Windows users may not see significant advantages. The performance of lower-end CPUs, like the Intel Celeron, is attributed to limited onboard cache, impacting speed. AMD's 64-bit processors feature improved memory latency due to onboard memory controllers and larger cache sizes, which can enhance performance. However, the current lack of widespread 64-bit software and the slow adoption of 64-bit operating systems by users lead to the conclusion that investing in AMD 64-bit technology may not be worthwhile at this time. Alternatives like Athlon XP or Pentium 4 are recommended for those seeking better performance without the complications of transitioning to 64-bit systems.