I have an i5 4690k and an ATI HD 7870, I'm going to be upgrading to a GTX 980 when I get the money and I won't be upgrading my PSU, know what wattage my PSU is? 650W. I'm fairly certain that the maximum practical power draw of the GTX Titan, GTX 780Ti and R9 290 doesn't go much higher than 380W even with the cards running at a reasonable overclock.
Also, the listed TDP of a CPU is not the amount of power it draws, it's something to do with the amount of power it dissipates as heat.
Well if you say so.
What about this one then?
If you're going to be spending money in that range on a PSU then I'd go for a Corsair, I don't think I've ever heard someone complain about a Corsair PSU