A console box with discrete GPU for a mass market box? Why would Valave do something that stupid?
RX 7600 would require additional 190W load on the PSU, you would need 300~400W PSU. You would also need PCIe x8 or x16 slot, the box will have to be much bigger to accommodate a discrete GPU and AFAIK there isn't a dual fan RX 7600 still sold, and if they rejig the whole thing's cooling rig, might as well screw the RX7600 and go with an APU...
In fact, doing a console that don't use an APU is, as cool kids would say, retarded. It saves on power usage, mobo complexity, RAM complexity etc..
So if Fremont is really aiming for RX 7600ish GPU power and 6 core Zen 4 or better, unless they want to wait for 2027 for RDNA 5 APUs, there is only one choice: Ryzen AI Max 385.
With 385 you get 8 core Zen 5 (crushes 6 core Zen 4), 32 CU RDNA 3.5 (even better than 32 CU RDNA 3 with faster GPU max clock) a shared LPDDR5X that would give you more RAM per dollar (32GB anyone?), comparable RAM bandwidth (256GB/s vs 288GB/s), all for more compact and cheaper box.
If you sell at cost,, it could be low as $500~600, and give you better than Series X/PS5 performance with much more modern GPU features.