My story:
AMD Duron 800MHz@ 1200MHz
AMD Athlon 1400MHz@1700MHz
AMD Athlon XP 1800+ @ 1640MHz
AMD Sempron 2600+ @ 2520MHz
AMD Turion 64 MK-38 @ 2681MHz
AMD Athlon X2 4000+ @ 3.2GHz
Intel Celeron Willamette 1,7GHz @ 2.5GHz
AMD and Intel - good CPU's. I like Athlon, Sempron,..., Celeron, Pentium, and over CPU's.