You have 780 and upgrading to 980? Pointless. Plus you wouldn't need new PSU. If you're buying a new GPU, either get a 970 or 980 if you want to pay so much more for little more performance, they are the same card essentially unlike 770 and 780. PSU a good 550-650W is enough for single GPU. I would buy either some 650W from the list linked above or get EVGA 750 G2. Another option is to get second hand GPUs (280x, 290, 290x) which tend to outperform in price/performance almost anything even the newly released 970 which does offer a good ratio. Although since 970 and 980 is new they don't cost as they should and most shops I have seen so far mark them up by $30-$200. In Europe especially, I've seen 970 sold for $500 instead of lets say $375 that would be the level of 770. Yeah lol, EVGA 970 for $550, screw 'em. Wait for prices to settle down and shops have enough stock. If they can't stock the cards due to bad supply they will keep the prices up. I have a second hand 280x, 3 months old when I got it for 60% of a price of new. Especially when mining people sell cards they tend to drop the second hand price a lot. I got mine from a gamer who didn't like CF or some such. I imagine now people will be getting rid of older GPUs maybe some of the 770s and 780s will see second hand dirt cheap. So if money is rare that is something to look for, for people who upgrade to Maxwell from the previous generation of top tier GPUs (770, 780, 280x, 290, 290x) and buy one cheap, or even two for the price of one 970 or 980. Although it's pointless to upgrade to Maxwell if one has 290, 290x, 780, 780Ti, Titan, ... The performance gain compared to 980 is negligible. Mostly I think people who hold 2 or more generations old GPUs (early Kepler GK104 680 = 770 and older) will now upgrade with all the hype they made up around Maxwell so far, until AMD kicks in with their release. Nvidia lacks free sync so far, which is a standard agreed upon, Nvidia gave into it and will support it, although it's a question when since even all features marketed with Maxwell are not yet available so they are kind of selling a rabbit in bag, you buy something but who knows what really. They are slow with updating drivers. Nvidia has Gsync but it's proprietary to Nvidia and not open to others I think and wasn't standardized. Free sync is adaptive sync that is VESA and displayport standard now, which should make it much easier and worthwhile for monitor makers to adopt instead of proprietary Gsync which has so far been limited to a couple of monitors not even worth buying.