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AMD Ryzen CPU Core Scaling Performance
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I wonder if that shrewd new branch prediction thing inside Ryzen would make a big difference on mixed benchmarks (running two different benchmarks in parallel), this might be very interesting because it's a more typical workload (like playing a game and streaming video at the same time).
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Originally posted by juno View PostIt's not magic, basically all the mainboard vendors screwed up their BIOS/UEFIs.
Looks like they underestimated Zen for too long and when they realised that there is money to be made, they rushed and pushed out crap.
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Originally posted by indepe View PostThe Dota 2 Vulkan numbers are really strange. SMT aside, 4-0 is slower than 3-0 and 2-0. This doesn't seem to make sense. And all cores enabled is the slowest result of all? I'm not sure the explanation would be SMT, in this case.
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Originally posted by starshipeleven View PostThis is actually pretty normal, on average, default board firmware on any system barely works with Windows and is rushed as fuck. It isn't until around a year after product release that the board firmware reaches maturity.
Originally posted by artivision View PostWhen many cores are used the turbo goes down to the base frequency
Originally posted by indepe View PostI just understood it the way the article seemed to be suggesting, and your answers lacked the verbosity for me to understand exactly what you were saying. I don't think you can expect anyone here to be well informed regarding the Zen's inner architecture.
But yeah, it should be fixed in the article ASAP to prevent more confusion.Last edited by juno; 04 March 2017, 05:28 PM.
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If you look at the OpenBenchmarking results, you can clearly see:
Code:1 + 1 AMD Ryzen 7 1700 Eight-Core @ 3.00GHz (4 Cores) 2 + 0 AMD Ryzen 7 1700 Eight-Core @ 3.00GHz (4 Cores) 2 + 2 AMD Ryzen 7 1700 Eight-Core @ 3.00GHz (8 Cores) 3 + 0 AMD Ryzen 7 1700 Eight-Core @ 3.00GHz (6 Cores) 3 + 3 AMD Ryzen 7 1700 Eight-Core @ 3.00GHz (12 Cores) 4 + 0 AMD Ryzen 7 1700 Eight-Core @ 3.00GHz (8 Cores) All AMD Ryzen 7 1700 Eight-Core @ 3.00GHz (16 Cores)
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It seems strange to me that the 2+2 config is nearly across the board within margin of 4+0. Since we know Ryzen has 4 integer units per core the only way that would be possible is if it is bottlenecked at 2 instructions per cycle per thread. And that would most likely be at the instruction decoder. That would explain why it lags single threaded performance.
EDIT: Disregard, I totally misunderstood. After reading more of this thread I realized my mistake.Last edited by duby229; 04 March 2017, 05:57 PM.
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