The Ultra LSP 650 is not a good PSU.
Before this thread is done you will probably have a dozen people posting in here about how much it sucks, just warning you ahead of time.
With PSUs, brand is everything. There are only 4 brands that everyone here will agree are worth spending money on. Those are:
1) XFX
2) Seasonic
3) Antec
4) Corsair
The reason that people will agree on those is because the first 2 are made 100% by Seasonic and the last 2 are Seasonic made like 50% of the time.
Personally, I wouldn't buy the last 2 because of that 50% of the time they aren't.
If you haven't got this PSU already, I would highly suggest you don't get it.
If you do have it, I would highly suggest you start saving for something good like an XFX 550w.
Believe it or not, the XFX 550w can put out about 2x of what the Ultra 650 can at room temperature.
It has to do with testing standards, I think. Like how there aren't any. One model could be tested in a furnace and the other in a freezer and the resulting wattage slapped on the label.
Temperature greatly affects what PSUs can output, so a PSU tested in a freezer won't put out anywhere near stated wattage at room temperature.
Most people that try to cheap out on the PSU also have top mount PSU cases (in my experience) which compounds the problem because the heat from in the computer has to go into the PSU and effectively stay in there (amount out = amount in).
If you had a bottom mount PSU case, you might get away with it, but your first order of business either way should be to save up for a better PSU.