@uygotye mate i have seen you post a similar answer in a few topics now. while i applaud your enthusiasm and willingness to help.
but you seem to be overstating whats needed for power in pretty much every post thats asking for help on psu requirments. and not just by a little either.
its an utter waste to put 750w into a pc that draws a max of 350w a 500-550w is more than enough and would have all the headroom a user would need.
at 350-to 450w typical usage then 600-650w is still more than you should ever need. recomending more will often incure a significant increase in cost to the end user, a cost he/she may not be able to afford and as a result may not get the perfomance there paying for because they have to scrimp elsewhere to make up the shortfall in the budgets to cover the higher end power unit.
in reality unless your doing a high end sli/crossfire build there should be no reason to put more that a 650w unit in any build even 1 rocking a a custom water loop. even with an oc.
amd recommended 550w for that gpu but it is also playing safe with them numbers to allow the end user to oc the card, the motherboard, the ram and the gpu. and thats for a non typical build of with a 140w cpu.
http/www.extreme.outervision.com/PSUEngine build a few different rigs and you will see what i mean.
i hope this helps.