Power supply building technical help required

Hey guys thanks again for reply,

But for using ATXPSU only my concerns are as below.

  1. This is having much more ampere capacity then my requirement as you can see in above posted image, won't it blow up my sevos,dc motor and stepper drivers.
  2. How much (exact) load requirement will be there and one which line(5v or 12v), I tested that ATX without any load with multimeter and it gave right readings.(12.03 v and 5.12v), so is there requirement for dummy load resistor or dummy light bulb...

Thanks,