You can often see the following question in Firebird technical support groups: "What is the hardware of choice for the Firebird DBMS?". This topic remains permanently popular because hardware requirements differ by tasks and hardware itself changes with time.
We decided to write Firebird Hardware guide in order to provide the necessary knowledge to anyone who wants to choose truly effective hardware for their Firebird database. To do it, you will have to learn some basic details on how Firebird, the operating system and, of course, hardware functions. http://ib-aid.com/en/articles/firebird-hardware-guide/