To achieve the optimal balance between performance, power consumption, temperature and noise, I must choose the hardwares carefully. I want the whole system to perform admirably well with minimal operating cost, long lasting and stealthily (without any noise).
To cut down cost, the power consumption must be low and the limit I set for this build is 50W.
In order to have a long lasting machine, the casing must be well ventilated to keep the temperature low, dust intake must be minimal and electric current must be regulated.
Since fan is the main culprit of noises, I must minimize the number of fans without sacrificing the ventilation too much.
You can read the complete guide to build Jarvis in the link.