Or at least they are according to Nvidia's reference specification, which third party manufacturers often tweak and tune to their liking to try and eek out a bit of extra performance from them.
Whereas the Ti's GPU has a base speed of 1500MHz and a boost of 1770MHz, the regular GTX 1660 is clocked at 1530MHz and 1785MHz respectively. However, the one area where the GTX 1660 trumps its Ti sibling is its GPU's base and boost clock speeds. The GTX 1660 also has fewer CUDA cores than its Ti sibling ( 1408 vs 1536), which are a bit like the cores you get in your CPU, but for graphics calculations.
Indeed, whereas the GTX 1660 has a memory bandwidth of 192GB/s, the Ti's is a whopping 288GB/s. While both cards have the same Turing TU116 GPU sitting at the heart of them, the Ti's 6GB of faster GDDR6 memory means it can chew through game data a lot faster than the non-Ti version's 6GB of GDDR5 memory. In terms of overall specs, the big difference between these two cards is the type of memory they come with.
