Isnt 450 to 600 a big jump?
I mean if recommended is 600 how can 450 handle it
or is that for future proofing?
Depends on the things you do but 450 is very low 600w is still kinda low. It’s not that big of a jump at all 450 to 1000w is big. I had a prebuilt system I upgraded all the parts except for my psu and it caused me serious problems. Please upgrade to at least 600w