Apparently this information has already been corrected by our product data team. As you correctly say, the clock speed is 1935 MHz according to the Gigabyte manufacturer's page: https://www.gigabyte.com/Graphics-Card/GV-N309TAORUSX-W-24GD/sp#sp
I don't think you will have the chance to buy one in the next 4 months. Because of the supply shortage.
Or if you are willing to spend a few grand, then you can buy one in about a month if you are lucky.