A UserBenchmark listing of an upcoming HP EliteDesk 805 G8 has surfaced. The listing indicates the mini PC running an AMD processor but only the OPN code is shown. It is likely that this OPN code refers to the AMD Ryzen 7 Pro 5750G APU. The benchmark does not reveal any dGPU, which was offered optionally with the EliteDesk 805 G6 (GTX 1660 Ti).
https://www.notebookcheck.net/Upcoming-HP-EliteDesk-805-G8-gets-listed-early-on-UserBenchmark-AMD-OPN-code-likely-points-to-a-Cezanne-Ryzen-7-Pro-5750G-APU.528652.0.html