Hello,
There is a discussion in the “SER Series Driver and BIOS download” post. It seems SER5 Max 6800U max TDP becomes 15W instead of 28W when GPU is at 100%
I did a test with FFXIV at maximum settings fps unlocked and Cinebench, with my EQR6. I was told I have the same issue, that CPU + GPU should be 28W, but it is not the case.
This is my BIOS.