The PSU only puts out enough power to keep the components going. If you have a power requirement of 600 watts, you're only going to be consuming 600 watts even if your PSU is capable of 1500 watts.So the replacement for my PSU continues. interestingly enough Corsair is offering to replace my 750w psu for a £400 1500w one. Sounds great, but something tells me that its just overkill secondly higher PSU watt more power consumption. I did a quick check for psu calculator and it will no where be near 1000w let alone need 1500w i would have to be running twin 4080, countless fans, LEDs cooling etc before i'll even get to 1500w.
i could accept but i dunno... seems excessive.
Also, a 1500 watt PSU wouldn't be breaking a sweat on your system, which may actually improve its longevity.