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JEMC said:

Well, the gap between AMD's 7600 and the 770XT GPUs is big enough to fit the 7600XT and bring some fight to Nvidia's 4060, but I don't see where they'll be able to fit something like the 7800.

The hypothetical 7700 would depend on how well the 7600XT performs.

I think the 7600XT will be an overclocked 7600, similar to the 6650XT over the 6600XT, but with twice the VRAM. Since the chip is already using the full amount of CU and the next one is much bigger, I doubt AMD will use a cut-down Navi 32 for this one and stay with the Navi 33.

The 7700 meanwhile should probably be the same chip as the 7700XT, but with more CU deactivated and lower TBP. I'm thinking something like 48CU and a TBP of 200W. The bigger question for me is if they stay at 12GB VRAM or go down to 10 like the 6700 non-XT did.

The 7800 could be something along the line of a "green" 7800XT, so same amount of CU, but with lowered clock speeds and TBP.

Alternative: New chips with Navi 3.5. But outside of the 7600XT (and 7500-7400 low-end GPUs), I don't see the point.