Deddie

What is this GPU going to be used for? If it's for gaming then I'd save up some more money because GPUs at this price-point are barely any better than integrated GPUs on modern CPUs.

I wouldn't get a 63€ CPU with a 115€ motherboard; I would get a cheaper motherboard with a more expensive CPU or just a cheaper motherboard.

80°C is the default temp target on it and around 80°C is normal for the titan cooler so it's fine.

Yeah, if you want a cheaper GPU then nothing beats the R9 280 in price/performance. The reason I suggested a GTX 970 was because it seemed like you were only interested in Nvidia cards and the GTX 970 is imo one of the only Nvidia cards right now worth its price.

I wouldn't take a pentium K if you're not gonna game and you want to multi-task. You're probably better off getting a i3 or i5 with a cheaper motherboard and no after-market cooler.

Yeah; if you're getting a ultrabook then the only difference between a i7 and a i5 is the clockspeed.

I have 2 670s and when I'm playing Payday 2 and Just Cause 2 I get a constant 120FPS and lately Just Cause 2 doesn't like SLI for some reason so now it's running at around 60FPS and I don't really notice the difference to 120FPS.

If you're lucky you could get a motherboard with a new enough UEFI on it already though.

Z87 do support Devil's Canyon if it has a new enough UEFI.

I have a 120hz monitor and I'm not that happy with it; I barely notice the difference between 60hz and 120hz, I only really notice it if I have V-sync on.

All depends on what games you play, so what games are you playing/planning to play?

Depends on what games you play. In harder to run games: no.

You most defiantly can't reach 120 FPS with a 7850. With a 770 you might reach 120 FPS if you turn the settings in the game to low or you're playing a easy to run game like CS:GO. To take advantage of a 120hz+ monitor in modern games you either need two 770s or one 980. If you can't spend that much money on GPUs you should instead get a nice IPS monitor like the Dell U2414H.

If you can spend a little bit more you should get a GTX 970 because it's much more powerful than a GTX 770 and uses less power.

You should probably stress-test it after you set it to be sure it's stable.