Lenovo lists AMD Ryzen 9 7900 and Ryzen 7 7700 (non-X) as prebuilt options.

The Ryzen 9 7900 and Ryzen 7 7700 processors are now available as options for Lenovo’s prebuilt desktops, confirming that they would initially be available only via OEMs. However, OEM-only components from AMD have in the past managed to find their way to retailers, who bought them in trays and sold them separately as combinations with motherboards and CPU coolers. This does not necessarily indicate that these chips won’t make it to the retail channel. The 7900 is a 12-core/24-thread component, just as its 7900X sister for the retail market. As with the 7700X, the 7700 is an 8-core/16-thread component. Apart from the fact that these chips have a base frequency of just 3.60 GHz, not much else is known about them (compared to 4.70 GHz for the 7900X, and 4.50 GHz for the 7700X). Both chips are anticipated to have a reduced TDP, with the 7700 drawing only 65 W (compared to the 7700X’s 105 W) and the 7900 possibly drawing 65 W or 105 W. (down from 170 W for the 7900X).