New computer to build

Hello,

I have semi complete list of components for my new computer MAINLY for gaming and occasional workstation work: home video production, or statistic computations in both cases using CUDA etc. Please could you advice on this?

First what should I change to avoid bottlenecks. Can the configuration be more economic. And most important whether this configuration can work at all. I will really appreciate any comments and help.

I really have problem to choose motherboard. I tried to compare a few but the specifications look so similar on website that it is hard to see what would be the best for me. I also don't know how much power I lose if I choose i5 7600K over i7 7700K. Is 0.7 GHz extra worth extra £100?

My plans are to buy: one more video card perhaps something cheaper than GTX1070, improve cooling system into hydro--it's too expensive now to add it to my list, one more optical drive. I really need to build a new comp as the old is literally dying whenever I run any game.

Thanks




My list (first item is my preference):

....Processor:
Intel Core i7 7700K Kaby Lake 4.2 GHz 4/8 core
Intel Core i5 7600K 3.8 GHz 4/4 core
the i7 for the money is a better cpu for video editing and streaming. it have 4 extra cores if the software can use the verutial cores in the i7.
....Heatsink:
Arctic Freezer i32

....Motherboard:
Asus Z170 A, Asus Z170 Pro, Asus Z170 Pro Gaming (very hard to choose)
the older 170 mb need bios updates for the newer kurby lake cpu. your better off getting the newer z270 mb.

....Video card:
MSI Geforce GTX 1070 GAMING Z 8GB
ASUS STRIX-GTX1070-O8G-Gaming, or

....Memory:
Corsair Vengeance® LPX 32GB (2x16GB) DDR4 DRAM 2400MHz C14 Memory Kit

....Case:
Corsair 760T Full-Tower Windowed Case
Corsair 750D Full Tower ATX Case

....Optional:
DemciFlex Obsidian for either 760T or 750D
Windows 10 Home
Optical drive (Blueray)
Second video card.
amd and both nvidia are in a gpu war. there both this year going ot be dropping newer gpu that use hba memory. your better off not buying a 2 gpu but selling the older gpu for some money and buying one fast gpu.

======= .... Already have
for speed look at the new m2 samsung ssd as boot drive.
Samsung SSD 500 GB (Windows)
Samsung SSD 250 GB (Linux)
WD Black 4TB Performance Desktop
PSU XFX 750W
make sure this power supply haswell supported if not on newer cpu the unit will shut down in low sleep modes.
Optical drive (DVD)