But AMD has added more pipelines and instruction units, whereas intel has really just added SSE2 and worked more on the clock speed.
Christian-Comp: Where do you get this silly idea that AMD chips are unstable? The only time they will crash is if you can't be bothered cooling them properly. A P4 may not crash, but you can still damage it by running it at a higher temp (even if it doesn't happen for ages)
The only reason this
PR+ Rating system came to be is because intel (and its vendors) came up with slogans like "Clock speed is the only TRUE measure of CPU performance" and started plastering them on ads. Up until the AthlonXP, the design of chips meant that if you had two chips from different manufacturers at the same clock, you would get roughly the same performance.