I'm in a reasonable position to answer this, I guess, I've experience of AMD's from K6 through Athlon and AMD64, and Intels from 486 through every Pentium (except Pentium M) up to Pentium 4. At present, AMD's desktop processors (I'm meaning AMD64 - X2 as well, as the core's pretty much the same) have (IMO) much better development (compilation etc) performance than Pentium 4s. I've built the same project from scratch on a 3GHz P4 and an AMD64 3400+ (clock speed is 2.2GHz) and the AMD took about 2/3 of the time of the P4 - other factors such as disk and RAM were approximately equal (1GB RAM, they both had 7200RPM disks, although the one with the AMD64 was a laptop drive, so might have been a bit slower). Other CPU bound tasks display similar speed differences. However, I think Intel are probably back on track with the Core Solo/Duo range - the Pentium M's were always pretty good for performance. Anyway - processor/chipset related software issues? Nah, didn't have any of those. HTH