You have sensors in each gpu.
And sensors plus cables would make device more expensive.
 I Wanted to be as much cheap as i can but i also i didnt want to make cheap chineese shit so it would broke in a year.  Accually i even did gold plated pcbs to be more durable.
Anyway tell me how temperature sensors would help ?

I am really open to ideas and if more people  say thet they wany ti have temperature sensors then i would do it.