Here is a link to my original build: https://pcpartpicker.com/b/BhQZxr
I began messing with overclocking my 1660ti and quickly realized heat was going to be an issue, reaching 80+ degrees consistently while gaming and with an aggressive fan curve the stock gpu fans were deafening.
So i found a low profile cpu cooler and cut out an attachment plate out of some sheet aluminum. The cooler came with a fan but I swapped it out for a scythe one to match the aesthetic and because having these fans mounted to my CPU cooler I knew they were very quiet.
Seriously, people be sleeping on scythe but these are comparable to Noctua and Be Quiet for noise and performance.
Some may say this is a waste of money on a 1660ti but this has helped me drop about 8-10 degrees and allow me to run a 2025 mhz core clock allowing me to put up 1070 ti and even 1080 numbers.
Afterburner screenshot is from playing Greedfall on high settings at 1080p for 30 min with no pauses, with fan set to a fixed 1200rpm.