News AMD Says Zen 3 Consumer CPUs Will Launch This Year

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we've seen the Tiger Lake architecture now ... dual ring bus doubles data rate, lpddr5 support, pcie4 for ssd, 8k60 support, av1 decode, thunderbolt 4, wifi6, avx512, dlboost, big cache increases, new gpu, new Willow Cove cores, new SuperFin process, significant clock increases vs Ice Lake.

I haven't seen any linux leaks of new features in zen3. Only thing announced so far is a change in ccx cache architecture.