i wanna know if...

[farhantarik12]

i have a rig which is powering a gtx 1050Ti and g4560 and the recommendation is about 450W. What happens if i go way pass that and power it with a 1000W? What will happen?

 

[COLGeek]

Nothing. Your system will still use only as much power as it needs. 1000w PSU is overkill for this config, but it will be fine.

 

[raisonjohn]

You'd get lower efficiency as your components will only consume the PSU's amps/watts that your rig uses.

Generally, the highest efficiency in PSU wattage curve is where you are using 50% of the PSU's rated power. As such, if say, your rig is drawing an average power of 225W, then the 450W would be the most efficient PSU. If a rig is drawing less or more on the wattage curve, the efficiency is lowered. So, if you are drawing 225W on a 1000W PSU, that's only using 22.5% (lower efficiency).

Another thing is cost/performance. Getting a 1000W PSU and you have spent more than what you need (and what you can only use), instead of getting a more affordable 450W PSU.