PC Magazine reports: "High-performance personal computers are thermal nightmares. As GPUs and CPUs have become more powerful, their heat output has skyrocketed. AMD's top-of-the-line Athlon 64 X2 4800+ is rated at 105W, while Intel's Pentium D 840 runs even higher, at 130W ... The typical way to dissipate all that heat? Throw extra cooling at the system—in other words, add more fans. Pretty soon, you've got more fans in your system than a B-36 bomber had propellers—and your system is as loud, too. You can't control the heat output (without moving to lower-performing components), but you can control the noise. Read on to find out how."
With Personal computers running hoter, its getting harder to keep them cool, and keep them quiet at the same time. The original PC only had fan for the power supply, now a PCs can have fans for the case, CPU, power supply, and video card. Thats a lot of fans and that can create a lot of noise. This article offers some great advice on how to reduce it.