- Mar 3, 2017
- 1,684
- 6,227
- 136
From engineering standing point of view - companies can do whatever they want.Since AMD creates the SOC for both Playstation and Xbox, they could probably do something similar for PC if there were a marketing for it (which I doubt)
I'd hoped that Valve might test those waters for AMD by ordering a semi custom console scale chip to follow Steam Deck's Van Gogh.From engineering standing point of view - companies can do whatever they want.
The problem is - the market. Its customers and what they want to pay money for, or rather - are used to pay money for.
What if Zen 5, being much wider and deeper than Zen 4, gets similarly greater SMT uplift to the tune of ~40%? If the core has an average ST IPC uplift of say ~28% and SMT uplift of ~40%, then it would be roughly 33% more performant in MT workloads / clock versus Zen 4 (what adroc claims)
Oh I must have missed that post, do you have a link to it? Interesting indeed. AMD's Zen 4 slides seems to suggest that the wider and deeper the core, it should get the bigger SMT uplift.Adroc claims Zen 5 SMT uplift is something like one third of Zen 4's.
But that's not what he said , he said 32%1t not ntOh I must have missed that post, do you have a link to it? Interesting indeed. AMD's Zen 4 slides seems to suggest that the wider and deeper the core, it should get the bigger SMT uplift.
Edit:
I just did the napkin math and it doesn't really add up. To get 32% higher MT IPC in nT workloads, with ~11% SMT uplift (versus 34% for Zen 4), you would need some insane ST IPC for the Zen 5 core:
1.6 x 1.11 / 1.34 ~= 1.33
60% is never going to happen.
I was under impression he said the IPC uplift refers to the slide he saw, which was a reference to the nT Turin MT performance. Maybe @adroc_thurston can clarify?But that's not what he said , he said 32%1t not nt
Oh I must have missed that post, do you have a link to it?
Turin-D SMT on is just a 10% socket-level perf bump over SMT off.
Adroc claims Zen 5 SMT uplift is something like one third of Zen 4's.
I would not bet anything against his claims. Or for them for that matter. But my gut tells to believe they are closer to the truth than many others.I'll be glad when he is proven wrong and just spewing verbal diarrhea. Unless of course he is right and I will have egg on my face. Fun times ahead!
IMHO no one but a VIP has the numbers that he is spitting out. And someone that important isn't going to leak those numbers. Plus claiming a price already? Yeah, not likely.
I think the other thing that can't be over looked is fabric bandwidth for dense , it's alot of very wide probably very aggressive prefetching cores for 1 ifop link. So fabric could be a limiting factor which then is addressed in zen6@HurleyBird
Yeah but that is not an IPC claim, but throughput per socket claim (which means that clocks can be different once SMT is enabled). Plus, it's about Turin Dense, not vanilla Zen 5 version.
@HurleyBird
Yeah but that is not an IPC claim, but throughput per socket claim (which means that clocks can be different once SMT is enabled). Plus, it's about Turin Dense, not vanilla Zen 5 version.
Well this is SIR, about as SMT-friendly as it gets really.
Genoa SMT benefit is ~30%-ish there.
Power tooI think the other thing that can't be over looked is fabric bandwidth for dense , it's alot of very wide probably very aggressive prefetching cores for 1 ifop link. So fabric could be a limiting factor which then is addressed in zen6
The price is just his speculation based on the performance he thinks Granite Ridge will have.I'll be glad when he is proven wrong and just spewing verbal diarrhea. Unless of course he is right and I will have egg on my face. Fun times ahead!
IMHO no one but a VIP has the numbers that he is spitting out. And someone that important isn't going to leak those numbers. Plus claiming a price already? Yeah, not likely.
But that's not what he said , he said 32%1t not nt
If true it will be probably only a teaser, not a launch, with some performance preview.AMD fights Meteors with paper at Ryzen 8000 launch
It looks like AMD is fighting paper with paper for the launch of the new Ryzen 8000 series.semiaccurate.com
Ryzen 8000 Paper Launch in December?!
Ryzen 8020, 8030, 8035, 8040, 8045 incoming?
(same as 7000 but with the first digit changed)
Plus claiming a price already? Yeah, not likely.
AMD fights Meteors with paper at Ryzen 8000 launch
It looks like AMD is fighting paper with paper for the launch of the new Ryzen 8000 series.semiaccurate.com
Ryzen 8000 Paper Launch in December?!