Ralin Day :
Intel® Core™ i7-4790K, 4.0GHz cpu
Asus GTX980-4GD5 gpu
2000GB(2TB) Seagate Barracuda 7200.14 HDD 3.5 , 64MB, SATAIII 600 hdd
SSD 240 gb 2.5 sata 3
1866MHz 8GB DDR3 ram 1866MHz KINGSTON HyperX FURY r
ASROCK H97M ANNIVERSARY Haswell Refresh/1150 SATA 3.0; USB 3.0 motherboard
700 Watt Fortron Hyper APFC psu
Hi!
I'll would suggest you to change the 980 for the 980 Ti, cause it has more vram and it's faster for a few more coins.
Many games use more than 4gb of vram, even at 1080, so imagine if you want to play at 1440 or more...
I have the Titan X and I use to play games with maxed settings at 2 and 4k using DSR (Dynamic Super Resolution) with my 1080 display. If you want to do the same, go for the 980 Ti. You will achieve the same performance and the 6gb of vram will be enough for playing games for long.
One more tip: Directx 12 can handle 6-12 times more polygons per second than Directx 11. That said, game developers will be able to create games with more details, so, if Skyrim full moded could use 5 gb of vram... just imagine what's next.
Another advice I'd like to give you, is that you should buy a better air-cooler for the CPU, cause the 4790K can easily reach high clock rates with proper cooling. A Noctua NH-D15 or similar would be ok, and it is cheap.
And finally, I consider 8gb insufficient, cause Windows eats hard drive space to convert it into virtual ram memory and this makes you loose some gigas of your SSD.
You could disable that option if you had 16 gb, cause your system won't need more than that for a long time. With 8gb, if your system runs out of memory and you disabled what I said, you'll have a BSOD.