I just built my computer with AMD XP+1600 CPU. At startup, it shows AMD Athlon 1400MHz. How do I know this is an XP cpu, not a regular Athlon 1.4 GHz? The control Panel says the same thing. thanks

Look on the CPU itself..there is lots of information printed there.

Your bios should see it as an Athalon XP not a 1400 mhz , look at you computer boards manufacture site to see if you need a bios update for it to recognise your cpu properly

ok i have been reading a write up in a pc magazine in australia it says the athalon xp series doesnt mean it is a 1.8 or 1.7 or 1.4 it means it is compariable to that speed cpu

AMD in a marketing effort started marketing their newest chips as the XP. They stopped marking the clock speed on their chips because clock speed was only one thing in determining a CPU's performance. Even though a 1.4ghz AMD processor had a slower clockspeed than a P4 1.8Mhz from Intel, it was still faster because is executed more instructions per clock cycle. So in short an XP 1600 has a 1.4Ghz clockspeed. Personally I don't like it because I'm intelligent to know the difference and I don't like having to look up what the actual clockspeed is. I like AMD anyways.

Its not a trick. Its a way of comparing different companies cpu speeds. Would you rather have them comparable at a glance or have to go look up benchmarks on the net to see if one companies cpu is faster than another although they are rated differently. Besides that wasnt Peter's question. He wants to know how to identify it so that he knows he got the XP one rather than an "ordinary" 1.4Gig one, ie that he wasnt being ripped off.

Don't even think about marketing numbers. That's what makes people spend lots of money. On the other hand the amd 1600 XP cup is FAST.