According to the report from Videocardz.com, the GTX 1630 is based on the GTX 1650 design with the same 12nm Turing TU117 GPU, but the cut down TU117-150 GPU packs 512 CUDA cores and 4GB of 12Gbps GDDR6 memory on a 64-bit memory bus.
Although the CUDA core count and the memory interface have been cut down from 896 and 128-bit, the GTX 1630 gets higher clock speeds, reaching a boost of up to 1800MHz. The TDP is set 75W, same as the GTX 1650.
As noted, the launch date is set for May 31st, and Nvidia could announce the card at the Computex keynote next week.
Unfortunately, there are no details on pricing, but currently, GTX 1650 is selling at around $210.