For the SV540 the GPU is going to be mounted similar to how the M1 mounts it - vertical in the slot - but instead of actually being "in the slot it" will be on a riser and moved to the opposite side of the motherboard.
Basically like BTX form factor via riser.
https://en.wikipedia.org/wiki/BTX_(form_factor)
This helps the cooling on this layout enormously as it eliminates the need to get air around the GPU as is the struggle in the M1.
GPU will just pull in air from the side same as the CPU cooler does, and both can then exhaust heat out the top / backside of the case.
At same time though I am not sure if I should make this a vertical case, or a standard layout case like the M1 is.
SV590 will be what is pictured less the black band around the bottom (dropping this takes $10 off the price) and adding some optional mounts for fans/SSD/HDDs on the GPU side. Will only be available in a new black that looks like anodized black, or a matte silver that looks like the clear anodize on a Macbook.
SV510 will basically be the same as the DSE Breathe with some rigidity improvements.