It is not much to go with, but a Ryzen 3 3300X Single thread/core Cinebench 15 score leaked onto the web by a Redditor with a fairly awesome nickname.  

AMD this week announced the Ryzen 3 3300X, a quad-core / 8-thread processor priced at 120 USD. Basically a nice value processor for some simple work and gaming at the latest Ryzen 3000 infrastructure. The only thing that was posted was a single thread score, 199 points. And that places the product in Core i7 7700K territory. We cannot of course vouch for the validity of this test result, you'll have to wait for our review.

Likely the score will flat out be beaten in multi-threaded performance., But time will tell, the indications are good though. You can expect Ryzen 3 3100 / 3300X reviews in roughly a week or three. 

AMD Ryzen 3 3300X Single Core Cinebench 15 Score Leaks