Help identify logic board from 27" Late 2015 iMac

I did.....but it just gives me the three options for that model year. It also doesn't list the 3TB Fusion option. I'm 99% sure it ihas the i7 in there, just trying to figure out the GPU.

@Mark Valpreda - I was hoping😞

Sadly, Apple uses a common logic board across the series so making an ID on what CPU or GPU not possible. Apple does laser code the boards, but we don’t have a decoder ring to figure them out.

FYI - this series did offer a 3TB Fusion as a build to order. From EveryMac:

“At the time of purchase, Apple also offered a 3 TB "Fusion Drive" (which combines a 128 GB SSD and a 3 TB hard drive), a 256 GB SSD, a 512 GB SSD, or a 1 TB SSD as optional upgrades.”