[SOLVED] Best budget cpu for high end tier gpus?

Solution
It depends on what you consider a budget CPU, and your location. The $85 R5 1600 AF is a great start, as it's nearly the same performance, as an R5 2600. The R5 3600/3600x is the current sweet spot, for price/performance.
The R5-3600 (6c/12T) and 3700X (8C/16T) are both pretty great values for levels of performance given their very reasonable price points....(Few would argue yet that the 3700X or above really help 'all that much' in gaming yet over the 3600, if gaming is a concern, but, if you are content creator, etc., perhaps the 3900X's 12 cores/24 threads might be of interest.)

If you even think you might again need (want?) a CPU upgrade in a years time, I'd probably look at an X570 mainboard, but, B450 with latest BIOS offers a great value currently, as PCI-e 4.0 does not affect/impact much currently, beyond some very impressive CrystalDiskMark sequential reads/writes scores...

No telling whether or not Intel's upcoming socket 1200 will last beyond the duration of 2020, as far as 'upgradeability' (although it would indeed be hard to imagine 'needing' some sort of upgrade very soon after getting a new 10700K/10900K)
 

Fusion1005

Commendable
Jan 15, 2020
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I also agree with the other guys the Ryzen 3600x is best the price/performance CPU..

If you're going to go Ryzen 5 3000 series then get the 3600, not the 3600x. The 3600x is $30 more and offers like 0.2 GHz more performance. It also comes with a slightly better cooler, but all together that def doesn't justify the extra spend. If you really want that extra 0.2 GHz then just OC the 3600. But if you find a 3600x on sale, pick it up.