I'm sorry, but some of you are a little bit confused.
The AMD Athlon and Duron support the FULL MMX instruction set that was added with the Pentium 166. (In fact, they run MMX instructions FASTER than the P3 OR P4.) AMD processors DO NOT support the P3s SSE instruction set. This is not a big loss since hardly any software takes advantage of them anyway. The Athlon and Duron both have a FPU some 34% better than either the P3, Celeron, or P4! AH, being a DX game, will be faster on an Athlon system at the same clock speed than a P3.
The Athlons are also cheaper than the P3.
Honestly, IMO you would have to be either an Intel sales rep or seriously misguided to buy a new system right now with either a P3 or a P4. The Athlon: 1. Is faster. 2. Reaches higher clockspeeds. 3. Will continue to use the same socket for a little while longer. 4. Is less expensive. 5. Is highly overclockable. (I'm running Thunderbird 700@927Mhz.)
The P3: 1. Is finished, there will be no P3s released faster than 1.13 Ghz. (It's unlikely even this processor will be re-released.) 2. Is outdated. 3. Is more expensive. 4. Is slower. 5. Is non-upgradable above 1 Gig.
The p4: 1. Horribly expensive. 2. 1.2 Athlon is cheaper AND outperforms it in most tasks. 3. Is due for a process shrink to .13 micron and a socket change. (This means if you buy a P4 system you will not be able to upgrade it !!! This alone should convince you not to buy one.) 4. Takes Rambus RAM. (Shudder, chills.
) 5. Requires special MB, case, PS. 6. Generates gobs of heat. 7. Suffers from serious design flaws.
The only bright side to the P4 is it's new SSE2 instruction set. Even AMD is impressed enough with them to include them in their next processor. (Palomino is the code name for this one.)
In summary, if you buy an Intel system ... you have likely had a lobotomy and do not know it.
As has been said many times before, the Athlon is better in ALL respects over the Intel processors. (Ok, there is one tiny little thing: Athlons do not have a thermal diode, which means you better not try to run them W/O a heatsink mounted. If you do they will burn up.)
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bloom25
THUNDERBIRDS