Q: "Is there an installation manual about how to install the Silent Spirit?" 

A: "Yes, you can download the installation manual as pdf here "

Q: "What is the best installation direction of the Silent Spirit on the motherboard?"

A: "The design concept of Silent Spirit is to cool the CPU and component around the CPU, such as North  bridge heatsink, mosfet heatsink etc. Therefore we suggest to place the Silent Spirit in the following position."

AMD Socket 754/939/940/AM2/AM2+/AM3 platform

Intel Socket 775 & 1366  platform