If you want to know the maximum possible power your computer would use why not use the PSU stress test in OCCT? i think that would put a pretty large load on your PSU.
Thanks to BradleyKZN for polishing my sig
“oooooooooooh fire!!! and girls...GIRLS and fire!!!!!!! oooooooooooooh *runz around clapping hands together*” -Marineborn