If past is any indication, I don't think Nintendo is really going for high-end specs (and sticking to 45nm and the small case confirm that).
Also, I don't think using rv7xx like gpus makes a lot of sense for a next year console - I'd suggest something closer to Turks (which has more than twice the shader power of Xenos after all).
The confirmation of edram on the cpu suggests to me it's an all-integrated cpu/gpu chip - I just can't see why they'd need a friggin big L3 edram cache otherwise.
If they opt for rather a lot of edram (32MB) they could in turn probably save on main memory bandwidth (64bit ddr3?), though 32MB edram on IBM's 45nm process takes up about 60mm² which might be too much (with 32MB edram you can fit both z buffer and color back buffer at 2xAA at 1920x1080 into it). If that's less edram (16MB?) it'll probably really need more main memory bandwidth (64bit gddr5?).
I think a chip integrating 16MB edram, with 4 Power derived cores, and Turks-like graphics (but different ROPs, handling AA like Xenos) should be quite doable on IBM's 45nm process (around 200-250mm² maybe?).
Also, I don't think using rv7xx like gpus makes a lot of sense for a next year console - I'd suggest something closer to Turks (which has more than twice the shader power of Xenos after all).
The confirmation of edram on the cpu suggests to me it's an all-integrated cpu/gpu chip - I just can't see why they'd need a friggin big L3 edram cache otherwise.
If they opt for rather a lot of edram (32MB) they could in turn probably save on main memory bandwidth (64bit ddr3?), though 32MB edram on IBM's 45nm process takes up about 60mm² which might be too much (with 32MB edram you can fit both z buffer and color back buffer at 2xAA at 1920x1080 into it). If that's less edram (16MB?) it'll probably really need more main memory bandwidth (64bit gddr5?).
I think a chip integrating 16MB edram, with 4 Power derived cores, and Turks-like graphics (but different ROPs, handling AA like Xenos) should be quite doable on IBM's 45nm process (around 200-250mm² maybe?).