Again I can only ASSUME , but I think it has a direct connection, and doesn’t use any lanes for its own. That means, any of those 24 lanes are extra and fully usable for anything else, chipset, NVME and 16x for the DGPU.I never claimed dGPU's had 4 lanes on older APU's; they have 8 lanes dedicated too.
I'm also not claiming there's aren't 16 lanes for graphics...i'm just wondering how it's giving 16 lanes to a dGPU and still feeding the iGPU. That's simple logic too.
It's a stupid thing to fuss over...someone with a 4000 or 5000 G processor and a dGPU might help clear it up.
that’s theory one.
theory two is, that if iGPU and DGPU are both in use, it will split up 8+8. Simply don’t use it then.