Quote: Originally Posted by The Jockster
My neighbour did give me an Evolabs 750w psu he had lying around (unused). Not knowing who this company is, I'm in two minds whether to use this instead.
If it is this
I wouldn't touch it with a barge pole. Not 80+ certified, very cheap, unknown brand. More often than not, those things are utter rubbish that melt down when asked to provide more than 400W.
The 450 W one isn't a better company either, as it is the same as above but adds 7+ years on top.
If I had to choose I'd go with the 700w, but just because it is newer and that setup shouldn't need more than 550W (eyeballing). Check the calculator Jockster provided to see how much power you need.
If I disabled 2 of the cores in the bios would this help with power management?
yes, but it's not worth it imho.