I have Zotac GTX 1660 Ti AMP!, but using MSI GTX 1660 Ti Gaming X BIOS since it has higher Boost (1875) and has Fan-Stop feature (Zotac doesn't allow me to turn off the fan when the GPU is idling most of the times).
I'm able to push my card Core to 2.100MHz, VRAM to 7.500MHz (15GBps), UV 0.950V max. Tested with everything, OCCT/Furmark/Afterburner Test/Time Spy/Valley/A/B/C/D benchmarking/stress testing software, and even games like SotTR, Metro Exodus, ACO, FC5, heavily modded Skyrim SE, etc. They are all said my card OC is stable/normal until I load up Blender trying to render BMW scene using GPU, it's throwing CUDA Cores error, then I tried to lower the boost till 2025 and no more Blender CUDA Cores error.
Blender render test is now my #1 testing method for checking GPU OC stability.
ASRock B450M Steel Legend
Zotac GTX 1660 Ti AMP!
G.Skill Flare X F4-3200C16D-16GFX
Be Quiet! Pure Power 11
Thermalright True Spirit 120M BW Rev.A
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