P2g

You might need to use Displayport.

That's not a bad GPU
 
Most reviews show that card sitting around 65c on full load.
https://www.techpowerup.com/reviews/ASUS/GTX_1070_Ti_STRIX/35.html
http://www.guru3d.com/articles_pages/asus_geforce_gtx_1070_ti_strix_gaming_review,9.html
 
However, those reviews are done on an open bench rather than inside a computer case. This will affect temperatures. Realistically, I'd expect that card to run between 68c and 71c at best, unless you have a fan blowing air directly on top of it.
 
In short, 75c is a little higher than what you could expect, but it's not bad. You can always either increase air flow inside your case, or increase the fan speed on the video card using MSI Afterburner if you wanted to lower those temps.

Ok, thank you mate ??

The the splitters would be perfect.

Normal

PCPartPicker part list / Price breakdown by merchant
CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor  (€198.99 @ Amazon Deutschland) 
Motherboard: ASRock - AB350M Pro4 Micro ATX AM4 Motherboard  (€78.53 @ Amazon Deutschland) 
Memory: Crucial - 16GB (2 x 8GB) DDR4-2133 Memory  (€112.95 @ Amazon Deutschland) 
Storage: Crucial - MX300 275GB M.2-2280 Solid State Drive  (€87.39 @ Amazon Deutschland) 
Storage: Toshiba - 2TB 3.5" 7200RPM Internal Hard Drive  (€64.59 @ Mindfactory) 
Video Card: MSI - GeForce GT 710 1GB Video Card  (€33.70 @ Amazon Deutschland) 
Case: Silverstone - RL01B-W-USB 3.0 (Black) ATX Mid Tower Case  (€34.51 @ Amazon Deutschland) 
Power Supply: be quiet! - Pure Power 10 300W 80+ Bronze Certified ATX Power Supply  (€43.49 @ Amazon Deutschland) 
Total: €654.15
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-10 15:13 CEST+0200

thank you so much buddy :))))

if it's just a simple rig for windows office and the like:
PCPartPicker part list / Price breakdown by merchant
CPU: Intel - Pentium G4600 3.6GHz Dual-Core Processor  ($86.88 @ OutletPC) 
Motherboard: ASRock - H110M-ITX/ac Mini ITX LGA1151 Motherboard  ($68.49 @ SuperBiiz) 
Memory: Corsair - Vengeance LPX 8GB (1 x 8GB) DDR4-2400 Memory  ($69.99 @ Newegg) 
Storage: SK hynix - SL308 250GB 2.5" Solid State Drive  ($77.99 @ SuperBiiz) 
Case: Antec - ISK 310-150 Mini ITX Desktop Case w/150W Power Supply  ($70.99 @ SuperBiiz) 
Total: $374.34
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-10 09:01 EDT-0400

okay intel's Budget boards have not released yet so you get to pay slight extra for z370 board now, but it has Igpu. incase you dont need gpu then you can run system fine. but i added gpu also. 
PCPartPicker part list / Price breakdown by merchant
CPU: Intel - Core i3-8100 3.6GHz Quad-Core Processor  ($117.00 @ B&H) 
Motherboard: MSI - Z370-A PRO ATX LGA1151 Motherboard  ($121.98 @ Newegg) 
Memory: Team - Dark 16GB (2 x 8GB) DDR4-2400 Memory  ($134.88 @ OutletPC) 
Storage: SK hynix - SL308 250GB 2.5" Solid State Drive  ($77.99 @ SuperBiiz) 
Storage: Seagate - Constellation ES 2TB 3.5" 7200RPM Internal Hard Drive  ($54.00 @ Newegg Marketplace) 
Video Card: EVGA - GeForce GTX 1050 Ti 4GB SSC GAMING ACX 3.0 Video Card  ($139.99 @ Newegg) 
Case: Deepcool - D-Shield ATX Mid Tower Case  ($29.99 @ SuperBiiz) 
Power Supply: Corsair - CXM 550W 80+ Bronze Certified Semi-Modular ATX Power Supply  ($38.99 @ Newegg) 
Total: $714.82
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-10 09:01 EDT-0400