Computer cooling has certainly come a long way since days of simple aluminum block coolers with few fins. But the overall concept remains very much the same today, and of course, heatsinks and cooling systems are a vital part of any computer's stability. Inadequate cooling leads to crashes, and sometimes worse.
The above picture shows heatsinks that were extruded from aluminum rods, and rods from ingots. These are long bars that haven't yet been cut down to size, but if you click on the image, you'll be able to see all the fins in detail.
On the next several pages, we've gathered some of the coolest looking water cooling systems as well as several cool heatsinks that we've stumbled upon.