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Trumpstyle said:
drkohler said:

Why would you use a 320bit bus for 16GByte ram??? There is no reason at all to use such an awkward solution, every additional bus interface adds unnecessary problems to your design.

That's pretty obvious, they wanna push the TF number so high as they can, cutting back Vram makes sense. It looks like they are indeed gonna be using FLEX MODE. 10GB fast Vram and 3GB Slow Vram for games, total 13GB.

You are not making any sense. To get to 16G on a 320bit bus, You'd install:

6 2G chips on 3 controllers, 4 1G chips on 2 controllers.

This means you'd spend a lot of money on 5 instead of only 4 controllers on the die (unlike 8 2G chips like on the PS5), you preorder a "small" mixture of 2G and 1G chips instead of a single, large order of 2G chips (again adding costs, and bureaucracy on top of it). If the XSX has indeed a 320 bit bus (which is not out of possibility, as people seem to see 10 ram chips on the dev unit), it would be 10 2G chips for a total of 20GBytes. Then if you wished you could work your ways into splitting the system into a partially divided cpu/gpu memory access structure but I highly doubt this would make any sense.

And lastly, high TFlop numbers always mean high memory bandwidth, so you'd want as wide a bus as possible (particularly since ray tracing is a serious burden on the bus).