I considered buying AMD for my new PC but then thought otherwise after hearing this from one of my friends: he brought an AMD Opteron X4 processor (or something high-end like that, I don't know much about AMD processor series), it was fast, but if it ran for any longer than 6 hours at stretch, the processor would over-heat. The ambient room temperature for most of the year here in Pakistan is 31-35 degrees celcius (or 90 degrees farenheit) which seems to exceed AMD processor's operational limits. All the sellers at them market tell a similar story. As a result, the re-sale price of AMD computers is nearly half as much as that of an Intel containing PC (here nobody can even think about throwing away even a measly Pentium 3 so discarding is out of the question). In the end, I am happy with my solution, my Intel Core 2 Duo runs for 18-24 hours a day without any disturbances.
AMD seriously needs to make its processors more robust, versatile and adaptable. Check out this video at
YouTube - Intel Vs AMD processor the video is probably faked but it gives you the general idea.