Was it sealed?
Which store did you buy it from.
Contact EVGA and ask directly.
EVGA won't get mad at you for heatsink removal, they are one of the only AIB's which allow it.
If you didn't have thermal pads, they will probably send you a set over the mail.
Tell them the GPU was reporting high temps on GPU-Z which lead you to take the heatsink off for inspection.
But im fairly sure the 1660ti should have thermal pads.
All my 1660 Supers had thermal pads on the Ram, and im sure the Ti versions use the same heat sink.
Did you watch the video above...
It clearly shows Thermal Pads.
Please don't confuse the OP more then he is.
Incase you missed it, here it is again.
@Zoozuu Get in contact with EVGA support.
Let them know your issue.
They will MAIL you a set if you really didn't get thermal pads if you got the card from an authorized vendor.
If you got it on EBAY or a non authorized, its not NEW then i bet.
It was probably mined on, they cleaned it up as best as they could, and discarded the pads.
Eitherway EVGA also sells thermal pad replacements, if they wont just give them to you.
or you can ask them what size you need to buy on amazon, and they will disclose it for you.
Or watch the video Skorpio linked. Im sure Steve took thickness measurements.
You can get thermalpads on Amazon.
You want a 12 W/mk range pad, as those are the most ideal.
Try to stay close to that number... the lower is less performance... higher is like paste material, not good to work with.