no idea what monitor you use or the games you play or which country you are from - here is a build (german suppliers).
PCPartPicker part list:
https://de.pcpartpicker.com/list/wM6DyX
Price breakdown by merchant: https://de.pcpartpicker.com/list/wM6DyX/by_merchant/
CPU: AMD - Ryzen 5 2600X 3.6 GHz 6-Core Processor (€204.90 @ Mindfactory)
Motherboard: Gigabyte - X470 AORUS ULTRA GAMING ATX AM4 Motherboard (€137.99 @ Amazon Deutschland)
Memory: Team - Vulcan 16 GB (2 x 8 GB) DDR4-3000 Memory (€121.73 @ Amazon Deutschland)
Video Card: Zotac - GeForce GTX 1070 Ti 8 GB AMP Edition Video Card (€406.46 @ Amazon Deutschland)
Power Supply: SeaSonic - FOCUS Plus Gold 750 W 80+ Gold Certified Fully-Modular ATX Power Supply (€106.90 @ Amazon Deutschland)
Total: €977.98
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-12-27 05:12 CET+0100