When a psu has the function; Modulator, does it mean that if i have a 1000w PSU it only use the needed power? Because if not, 1000w would be a lot on the EL-bill...
No it won't use 1000W aqll of the time, that'd damage your system. The PSU will only draw as much power as the PC needs. So even if you had a 1000W PSU, but your PC was only using 350W, the PSU would only draw 350W. Helps with bills