Originally posted by entropy
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AMD Is Aiming For Radeon RX 5700 "Navi" Support In Linux 5.3 + Mesa 19.2
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Originally posted by debianxfce View Post
You do not need to buy anything if you have a fullhd monitor as the 7950 card suggest. It has a RX 560 performance. I have an academic interest for cheaper NAVI 5000 models after the 5700 model and the performance per dollar value must be good before I buy anything. My RX 570 is enough fast for 2K and 4K gaming. Freesync and LFC are great features.
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Originally posted by Veto View PostExcept that Ryzen is not really x86, but AMD64 + lots of extensions (e.g. AVX), which is arguably a quite different ISA as well...
You are right about AMD64 changing the programming model though (more and wider architectural registers) - I should have worded that differently.
The point I was trying to make though was that even the changes from x86 to AMD64 were small in comparison to the massive changes in micro-architecture that have provided ongoing performance improvements. It's not a perfect analogy because GPUs are SIMD/SIMT behind the scenes while CPUs are superscalar, but it's close.
Originally posted by Veto View PostI always found the commitment to the GCN ISA interesting, and wonder how long you are going to stick to it. With the history of rapidly changing GPU architectures and ISAs, it is impressive if you manage to pull of some sort of standardization at GPU ISA level that is both efficient and sustainable (with extensions of course)! I would guess RT will require some additions
The main difference in programming model IIRC is that we include scalar instructions/registers alongside vector (SIMD/SIMT) instructions/registers while some other vendors do not. Anything past that gets down into what you might call extensions (operations, addressing modes etc..), and they change regularly between generations.Last edited by bridgman; 01 June 2019, 07:00 PM.Test signature
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Originally posted by bridgman View PostAFAICS most GPU vendor ISAs have largely converged already, and most of the changes now are in the underlying implementations rather than the programming models themselves.
The main difference in programming model IIRC is that we include scalar instructions/registers alongside vector (SIMD/SIMT) instructions/registers while some other vendors do not. Anything past that gets down into what you might call extensions (operations, addressing modes etc..), and they change regularly between generations.
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Originally posted by entropy View PostI was about to replace my Phenom II and Radeon 7950 with Zen 2 and Navi.
What do you think should I at least wait for the new Navis in 2020 instead?
It's said they'll feature ray tracing HW and a significantly different architecture. (?)
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