AMD. Hands Down. The Athlon64 Architechture is more elegant, more efficient, and faster than any NetBurst architechture Intel CPU. Intel sure got caught with their pants down there. They incorrectly assumed they could sell everyone on higher clockspeed=better with their marketing billion$, but discriminating gamers, DIYers, and O/Cers saw through Intel's marketing BS and decided they preferred cooler, faster, less expensive processors over namebrand...and now AMD is the way to go, even for know-nothings. AMD has recently surpassed Intel in retail desktop system sales, and the trend looks good for AMD, and bad for Intel. Intel's stock was even downgraded because the financial world is finally noticing that AMD has been taking marketshare from Intel ever since the Athlon64s/Opterons came out and began wiping the floor with Pentium 4s/Xeons.