The GTX 1660 Mining Settings will generally work for all models, but most of the time you will have some tweaking to do due to your GPU Silicon. Never mine with Stock settings as they will overheat your GPU! You can learn more in our Overclocking For Miners Guide.
GTX 1660 Mining Overclocks
Absolute Values are most commonly used in Linux-based Mining OS and they usually give more effeciency, while Offset is more common for Windows. N/A or 0 = leave blank.
GTX 1660 ETChash Mining Overclocks
lolminer improved Zelhash performance for specific GPU Architectures by 15-20%. The Architectures that benefit from this are NVIDIA Turing and Ampere, and AMD Navi and 5000 Series. This has also been adobted by other Miners such as MiniZ Miner... and yes, the GTX 1660 benefits from this too.