This is actually decent PSU. Mediocre quality and would do fine with GTX 1660 Ti.
For 2nd opinion about that PSU, look at PSU tier list,
link:
https://forums.tomshardware.com/thr...er-list-rev-14-8-final-update-jul-21.3624094/
Pure Power 11 is in Tier B. While Tier A PSU would be better. Still, given that there are FAR worse PSUs out there, Pure Power 11 will do.
Also, GTX 1660 Ti doesn't have high transient power spikes, which would otherwise trip the PSU (that's this specific PSU issue, mostly plagued by higher capacity units, when using beefier GPUs, especially RTX 30-series).
GTX 1660 Ti is 120W GPU, add the rest of the system to it at ~200W and on max load, PC consumes ~320W, making 500W PSU enough (even have some CPU/GPU OC headroom).