IdealPC

Try another graphics card to see if the situation remains

I guess since it's a 1660 it's highly unlikely it is under warranty. The good news is that the worst moment for that to happen has already passed. Now there are actually some good value GPUs out there.

It's dead

Set the clock to 2666 manually in BIOS

It's too easy find evidence......what's going wrong with you? you see things by your own imagination? or you have a bad memory?
https://gpu.userbenchmark.com/Compare/Nvidia-GTX-1660S-Super-vs-Nvidia-GTX-1660/4056vs4038
I d

Agreed...he must get himself confused with 1660S and 1660TI, 1660TI is the worst choice considering cost performance...1660S is the best card for 1080P, only around 200USD

You won't regret buying a 1660s, only 2-3% slower than 1660ti but 50$ cheaper.

Maybe you're confusing something because the cheapest dual fan 1660 Super is $230 on PCPP and the cheapest 1660 Ti is $280. Also the performance difference seems to be around 5% at best. If anything the 1660 Ti is the overpriced one.
 
On topic: I personally would recommend the 5600XT Sapphire Pulse or the Gigabyte Gaming OC(the model names are links to the respective PCPP pages) if the intention is to stay between $250 and $300.

of course 2080S, $20 for around 15% higher performance....

🤣I was kinda thinking I went back to 90's until I double checked the time of the post...

warmer than a oven🤣