You are thermal throttling. The TJMax of the R7 7800x3D is lower than the normal R7 7800 (89°C vs 95°C). Kinda weird with the 120W TDP of the CPU, so I would check if your AIO is running at a Silent Mode and if that isn't the case make sure there is no toasty plastic between your AIO and the CPU. I've seen people cool 250W TDP CPUs with your AIO and not hit 89° so this sounds quite likely to me.
nixterboy, you are probably not throttling due to Tjmax but we can't tell since you did not post relative information. Please run Cinebench (2024.1) again and post a screenshot of Ryzen Master (RM). You Cinebench score tells me that you are running an older version of Cinebench. Please go to their website and DL the latest (2024.1). Thanks and enjoy, John.
Is there something I’m doing wrong if my 7800 x3d cinebench bench multi core score is 1068?
Yes, Baldaust88. Post the screenshot of RM I requested. John.
7800 x3d only scores around on par with a 12700k