the RTX 2080 will do more then your monitor can handle, probably.
Ur question is like :" Can this 500k Lambo go 30 in a schoolzone"
for clarification, the lambo being the GPU and the schoolzone the game.
PCPartPicker part list: https://uk.pcpartpicker.com/list/JtD629
Price breakdown by merchant: https://uk.pcpartpicker.com/list/JtD629/by_merchant/
CPU: AMD - Ryzen 7 2700X 3.7GHz 8-Core Processor (£284.98 @ PC World Business)
CPU Cooler: Fractal Design - Celsius S36 87.6 CFM Liquid CPU Cooler (£123.92 @ More Computers)
Motherboard: Gigabyte - X470 AORUS GAMING 7 WIFI ATX AM4 Motherboard (£224.39 @ Aria PC)
Memory: Corsair - Vengeance RGB 16GB (2 x 8GB) DDR4-3000 Memory (£151.55 @ Box Limited)
Storage: Samsung - 960 EVO 500GB M.2-2280 Solid State Drive (£139.57 @ More Computers)
Storage: Samsung - 860 Evo 500GB 2.5" Solid State Drive (£89.96 @ Ebuyer)
Video Card: Gigabyte - GeForce GTX 1080 Ti 11GB AORUS Xtreme Edition 11G Video Card (£729.98 @ Ebuyer)
Case: Fractal Design - Meshify C Dark TG ATX Mid Tower Case (£79.99 @ Amazon UK)
Power Supply: Corsair - RMx 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£89.98 @ PC World Business)
Total: £1914.32
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-09-15 18:05 BST+0100
Here's a list for you to consider; Ryzen 7 2700X on an X470 motherboard, 16GB of RAM (with RGB), and a GTX 1080 Ti, all for under £2000.
If you needed a monitor and peripherals, reducing the amount of storage, changing to cheaper non-RGB RAM, and going for perhaps a Ryzen 5 2600 and an Arctic Freezer 33 eSports One is a nice alternative.