Your 1660ti should give you 30-32MH not 27MH, that's the type of hashrate you should get from a normal 1660 non ti and non Super, it's because you aren't using the right configuration or OC combinations. Use Trex miner and lock the core clock to 1300 using Hive OS and meme clock 1600-1900.
I didn't realize that! I was using Nicehash miner. Is there any possibility that Nicehash is stealing some of the powers from the hardware? I will try the Trex miner and the configuration you've shared here if I decide to go back to mining again. As of now, I have completely stopped mining as I use my laptop for other activities like gaming and graphics design. Also I believe, if I start mining full time, it will ruin the hardware over a period of time as laptops are not really that well built to handle a huge amount of heat for a longer period of time. Thanks for the tip though!