No, you need i5 12400/R5 5600 IMO. So new CPU, mobo & RAM.
If you plan to upgrade the PC soon, say in next 6 months or so, then no harm in buying 3060Ti or even better 6750XT now. Then save & upgrade other parts later.
Sww how the old R5 2600 struggles in gaming fps beyond RX5700. 6750XT is close to 2080Ti like performance, 3060Ti is 10% behind or so. The difference in fps between R5 2600 & i9 9900K is too huge with 2080Ti, can expect similar big gains moving from i5 6600 + 6750XT to R5 5600 + 6750XT.
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