This is our first retail purchased Intel Core i7-7700K processor that we sourced through Amazon. This one makes four that we have had hands-on and three that we still have here in our possession. To my chagrin, it does not look like 5GHz/3600MHz is in the cards for this one when it comes to running stability tests. I have run the vCore up to an actual 1.38v, and I think I might call it there. That makes our 5GHz rate 25% so far.
The black marks are the IHS are in preparation for delidding.
Discussion
Source: [H]ardOCP – Retail 7700K Not Up to 5GHz – 3600MHz