I just finished re-building an computer rig from about 4yrs ago. Long story short, I've used a few PC Part calculator websites and applications to discover my build requires roughly about 250 watts of energy to effectively run.
As time goes on, I'm expecting, AT MOST, to MAYBE add in an additional hard drive (roughly 20W). I have enough USBs and cooling fans so I shouldn't need/want much else.
My power supply is 600 watts... Yes I know, overkill. My question is should I downsize my power supply and if so what would be a good Watt power supply to invest in? I was thinking a 280W supply should be just fine for my needs.
My main reason for asking is because I've heard power supplies shouldn't supply 100% of their power when possible, as well as down the road at (for example) 300W power supply will start to diminish and supply less energy. I'm assuming this drop is roughly 10%, but again, just my assumptions.
If I'm missing any info please let me know and I'll try to include as much info as possible.
It seems every question I have is answered the quickest and most effective here, so again and again I find my way back to the forums of BleepingComputer