Last night I made one of my greatest upgrades on my old Core2 QUAD PC that made me definitely keep it as a backup/work machine. That simple (and cheap) upgrade is simply called CONTAC 30. The CPU cooler wich is perfectly efficient, quiet, universal and compatible with all Intel sockets (775, 1156, 1155, 1366 and 2011) + all AMD sockets (AM2, AM2+, AM3, AM3+ AND FM1) and after all, looks geeky nice. The body is made of thin blades (that you should be careful with) and 3 copper air pipes that absorbs hot air.
The cooler can be mounted in any direction but the catch is that it should be positioned to: take air from the case above RAM with its 120mm fan and pull it through its radiator toward the case fan which throws it out. That is the correct cooler direction and you can see the example on the images bellow. On the other way, if you mount the cooler this way, you will get double benefit. First, it will cool CPU and second it will blow out the air from CPU and RAM out through case fan!
Overclocked Core2 QUAD 2.8Ghz to 3.8Ghz CPU with a stock cooler went up to 100+ degrees, and here are the temperatures with same overclocking configuration (whole +1ghz) during the stress test in AIDA64:
Any other specific information you can find at Thermaltake official web site. It is newer model, same as CONTAC 39 and they obviously do the great job. After all this talk here there is nothing left to say except GO FOR IT and make your PC 30% faster (with conditions that your mb. and memory supports good overclocking features). Hardware used for test are ASUS P5Q PRO, 8GB Kingston HYPER X 1066mhz DDR2 RAM and Core2 QUAD 9550 as described in few posts before this.