1660ti is great ... super great for crunching. I got mine at $280 and it looks like it's still $280 on Amazon
https://www.amazon.com/MSI-GeForce-G...s%2C263&sr=8-2

I'm running 8 of those on Collatz and power draw is 847 watts at the wall. That included 2 cpu, 2 mobos, 2 psu and a monitor.


For about the same price range, ~$300, you can get the 2060 KO from EVGA. Which is a bit faster than the 1660ti, but also draws more power ... about 117 watts by itself (Collatz).
I don't game much, so I don't know how they perform on gaming.