Now that NVidia has released their latest graphics cards, the GTX 970 and GTX 980, it is time to analyse which GPU I should upgrade to, from my aging GTX 670.
It is almost definitely going to be the GTX 970 because it is priced extremely aggressively compared to competition (i.e. AMD Radeon R9 290) and does not need a nuclear reactor to power up. The GTX 980 is also power efficient, in fact even more than the GTX 970 for some unexplainable reason, but the price is absurd. It should have been priced below $500. $449 perhaps.
There is also another advantage of going with the GTX 970. With it, there is a possibility of adding a second card for SLI without a need for the change of the 650W PSU that I currently own. Even when the GTX 970 is overclocked, I doubt it would draw in excess of 200W, hence two cards will consume less than 400W. With my Core i7 4790K overclocked to 4.6GHz, which would max out at 130W on a really stressful work load (though not Prime 95), that would give sufficient breathing room for the other components.
Perhaps it is possible to power up two GTX 980s with 650W PSU, and there are apparently people who do with just a 600W PSU, but there is the issue of shedding down $1100 for graphics cards. Two GTX 970s would set you back at $700, which is still way out of many peoples' budgets, including me, hence the chances of going SLI is very slim.