Apart from the Toughpower series TT are not much more than a shiny new paint job on a rotten apple.
Here's an example. DC voltage (Direct Current) is supposed to be a constant line voltage, AC (Alternating Current) voltage fluctuates up and down, a sine wave. Ac voltage is bad for DC components on many levels.
This is the 12v output of a 650w TT Smart Power Pro, as tested by jonnyguru's ppl.
This is the 12v output of a 550w Evga G2, as tested by the same ppl.
You tell me which one looks like it's supposed to be a 12v DC output and which one looks like it's barely any better than the AC coming from the wall.
Just what do you think that poor cpu and gpu is going to be like in a few short months with that miserable excuse of a wave pounding at it relentlessly. Stability? Good luck there unless you over voltage the cpu so that those drops don't bluescreen of death with regularity.
There is a reason regular posters harp about spending more money on a better psu, it means you won't be replacing burned out motherboards or cpus or gpus. Spend $700 on a top line gpu, and try and squeak by on a $50 psu. Right. Priorities. Gotta get that last few fps.
Right up until the point they start posting here with power related issues, bluescreens, pc won't start, why am I getting no signal....