POWER CONSUMPTION AND EFFICIENCY

The intel pentium4 and D processor series were notorious for consuming a lot of power, and consequently running quite hot. The architecture Intel based the core2duo processors on is much better in this regard. While Pentium 4 architecture was at one time headed towards 150W TDP (Typical Design power), many of its current processors are now pushing 85W or less. One generation before, Intel Pentium D CPUs hovered around the 125W TDP range, late model Core 2 Duo processors have a 65W TDP!

It's true enough that the power values AMD and Intel specify are not entirely comparable with each other, but total system power measurements give a good basis for comparison. I've conducted some power draw measurements recently, and those tests showed that Intel is genuinely kicking high power habit. An average intel core2 duo E6750based computer system draws about 7W more power than a budget AMD Sempron 3600+ based PC system with its single CPU core running at idle. You'd think the lower power budget AMD chip would be significantly easier on the juice than the fairly high end E6750 Core 2 Duo, but the difference is pretty small.

With an Intel Core 2 Duo system under load, total power draw results are impressive. For instance, a Core 2 Duo E6750 system consumes 163W of power (total PC power draw) when running with both CPU cores under load.

A comparable Intel pentium d 940 system consumes 253W of power with both processing CPU cores stressed, and an AMD athlon FX-62 power system consumes upwards of 235W! It's clear you can save a lot on the utility bills by switching to a CPU that sips electricity. Intel offers this, with great performance. (Please keep in mind that these are total system power draw values, not just the processor.)

I've often thought that Intel is the more innovative of the two companies when it comes to designing heatsinks for its processors. The current Core 2 Duo bifurcated radial fin heatsinks are remarkably good, and very quiet.

Gone are the days of throwing out the stock heatsink for an after market cooler the second the box is opened... For good all around CPU cooling, it's tough to beat Intel in terms of noise level. The stock heatsinks are just so quiet, thanks in large part to 90mm fans and Pulse Width Modulation which allows the rotational speed to vary based on moment to moment thermal output.