Ideally spend the mare on your gpu if it's mainly for gaming
PCPartPicker Part List
Type|Item|Price
:----|:----|:----
CPU | AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor | €129.90 @ Alternate
Motherboard | MSI - B450-A PRO ATX AM4 Motherboard | €82.90 @ Amazon Deutschland
Memory | \*G.Skill - Aegis 16 GB (2 x 8 GB) DDR4-3000 Memory | €58.90 @ Amazon Deutschland
Storage | \*Patriot - Burst 480 GB 2.5" Solid State Drive | €46.99 @ Amazon Deutschland
Storage | \*Hitachi - Ultrastar 7K4000 3 TB 3.5" 7200RPM Internal Hard Drive | €59.50 @ Amazon Deutschland
Video Card | \*Zotac - GeForce RTX 2080 8 GB Video Card | €657.94 @ Mindfactory
Case | Corsair - SPEC-04 ATX Mid Tower Case | €46.99 @ Amazon Deutschland
Power Supply | Corsair - CXM 550 W 80+ Bronze Certified Semi-modular ATX Power Supply | €63.99 @ Amazon Deutschland
| Prices include shipping, taxes, rebates, and discounts |
| Total | €1147.11
| \*Lowest price parts chosen from parametric criteria |
| Generated by PCPartPicker 2019-07-05 15:58 CEST+0200 |
That card is way too strong for the 2600. There will be some amount of limitation on some games. Explained over here...
https://forums.tomshardware.com/threads/will-ryzen-5-2600-bottleneck-rtx-2080.3461930/
It will only perform as good as the strongest card the cpu can support without limiting its potential. In short you are paying way more on a card, than the performance you can get proportionately."I would have no problems with pairing that graphics card with that CPU " A slight bottleneck will still outperform a lower tier GPU, and will result in overall better performance. So for the same price it's definitely worth.
Read the whole thread, everyone is saying it is fine, especially if you run at a higher resolution.