We have already seen a lot of photos of reference and non-reference GeForce RTX 3080, including pictures of printed circuit boards. GeForce RTX 3090 is released on September 24th, so there are still only pictures and images of the cards themselves without details.
Today we have the opportunity for the first time to look at a printed circuit board of the unreferenced RTX 3090 in the Gigabyte version.
In this case, the Eagle cards are compared, and we see that the printed circuit boards are identical, and the only differences are additional memory chips and other components of the older model.
You can also see how the memory chips are placed on the back side of the board. Recall that RTX 3090 has 24 GB of memory, so it is impossible to place it all on one side.