Originally Posted by TechRex
I pretty much screwed myself to a life of worry when I bought a cheap PSU. You can see it here :
So I'm wondering if it can power :
My CPU at 4ghz (to be safe, up to 1.5v)
4gb G.SKILL ECO overclocked (to be safe 1.65v)
and the rest of my sig rig
It might help to know that I plan on getting some 2gb MSI 6950s and unlocking the BIOS to 6970s.
Really that should be able to do it, IMO the 6970's are similar power-consumption wise to 4870 (+ about 20W), my system loads out at less than 500W from the wall with slightly OC'd i7 and CF 4870. That adds up to probably around 410W DC, well within that safety margin. With a really high OC on CPU/GPU I would bank on about 550W maximum DC load. 750 gives you a good margin, if it will actually do that.
There's a few things you probably want to look out for-
RAM straight up doesn't use a whole lot of power, SSD's are also on the order of less than 5W.
OC dramatically drives up your consumption, if you're worried about it just clock down a little bit. You should still have the headroom though.
Most good PSU manufacturers rate at 50C, not 30 or 40. FSP Group, Antec, PC Pow&C Corsair (I think) all base on that, it shows they're not trying to inflate numbers.
Is the PSU heavy? Really that's a pretty decent indicator, the Raidmax PSU I had in my first build (heh) was light as a feather, it went up in smoke while I was taking a shower, that was fun to come back to. The Antec I replaced it with was a tank, I had the fan fail on it and didn't even know about it until it hit thermal shutdown (days?) later. It was burning hot but kept on trucking.
People here (and on OC sites in general) tend to overbuy power supplies. That's not really a bad thing, but you usually don't need as much as everyone recommends.Edited by Arkanor - 3/6/11 at 10:45am