Discussion Zen 5 Speculation (EPYC Turin and Strix Point/Granite Ridge - Ryzen 9000)

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Panino Manino

Senior member
Jan 28, 2017
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All competitors are so wide compared to Zen 4, can't wait to see how BIG AMD dared to go with Zen 5.
And I hope, with Zen 6 AMD will also achieve the same increases if performance with achievement thus far only refining its base. But I'm not sure if this is still enough to stay ahead of Intel.

I'm coming here because this is not like certain other places that discuss hardware, and its disappointed to see so much focus on and good faith assumed for the worst clowns on YouTube (who have a history of lying). I'm probably in the minority and I presume this will come across as whining and unconstructive but I think the quality of the discussion would improve if we stopped acknowledging actors who have proven not to be serious. I'm actually OK with gossip and chatter and even the sites collecting those, just not the people we already know are dishonest and who earn money off of making up new lies it which messes up the incentives.

/rant
Its drug addiction.
 

Timmah!

Golden Member
Jul 24, 2010
1,430
660
136
Zen 5 standard would be N4 with 8 cores per CCD
Zen 5c N3 with 16 cores per CCD
Zen 6 standard N3 with 16 cores per CCD
Zen 6c N2 with 32 cores per CCD
If thats the case, my hopes are for a CPU with 2x Zen 6 16C dies, on AM5.
If AMD wont release such CPU and stick only to 16C, because "nobody needs more than 16C" on desktop, i will be mightily disappointed. Or if they release it, but new socket will be requirement, thus new mobo. No bueno. Only acceptable if 2x new dies housing 16C each would not physically fit AM5, or if the new socket will come with quad channel to feed up to 32cores.
 

randomhero

Member
Apr 28, 2020
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1.15x IPC would be a disappointment for many. But that's why I think the hype train must die.
Clock regression would kill it. But so far Zen teams have always avoided that (even if Zen 3 did have lower all core clocks).
I am of opinion that they will hit 1.2-1.25 on average.Clocks will stay sameish. What will change most is ppw. I think it will shoot through the roof ( at sane clock speeds ~ 4ghz).
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
25,641
14,630
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I'm coming here because this is not like certain other places that discuss hardware, and its disappointed to see so much focus on and good faith assumed for the worst clowns on YouTube (who have a history of lying). I'm probably in the minority and I presume this will come across as whining and unconstructive but I think the quality of the discussion would improve if we stopped acknowledging actors who have proven not to be serious. I'm actually OK with gossip and chatter and even the sites collecting those, just not the people we already know are dishonest and who earn money off of making up new lies it which messes up the incentives.

/rant
Speaking for myself.... Since I know AMDs reputation as of late (the last 6 years) of under promising, and overdelivering, and we have one poster that seems to have mostly correct information, I believe the hype.... to a point. I don't care what the reputation of these youtube clowns is, if they are close the what I think is true, then fine.
 

Glo.

Diamond Member
Apr 25, 2015
5,730
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Actually, he is not entirely wrong.
16CU RDNA3(3.5) at 2.2GHz would be on par with RTX 3050 mobile.
As you mentioned, the problem is the missing BW, which will cripple performance.

On the other hand, Strix halo with 24CU should compete with 4050 laptop, If 32MB Mall and 256-bit memory controller will not be cut-down significantly.

Half correct.

I've mistaken 20CU with 24 CU, but look at what he says in the description of Strix Point iGPU: 16 CUs, without Infinity Cache - trades blows with 3050 laptop GPUs.
While showing the slide in which 20CU, 128 bit but WITH Infinity Cache - 3050 perf/W class, presumably existing within that 55W TDP thermal envelope, in which Strix Halo should exist on the lower end side.

He has slides that say one thing, and he carries on to report something completely different.
 

adroc_thurston

Platinum Member
Jul 2, 2023
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but that does not say anything about ppw.
It kinda does, 25% socket power bump on the same platform is pretty major.
But the perf signs.
I have the feeling that AMD themselves purposely "leaked" this document in order to curtail the 30%+ IPC claims
Yeah Meta already did an oopsie that gave us SRF-AP.
 
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Joe NYC

Platinum Member
Jun 26, 2021
2,073
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It kinda does, 25% socket power bump on the same platform is pretty major.
But the perf signs.

Yeah Meta already did an oopsie that gave us SRF-AP.

What about the regular SRF? Regular 144 core SRF seems quite hopeless even against Bergamo, not to mention Turin Dense - lower than full core-count models.
 

TESKATLIPOKA

Platinum Member
May 1, 2020
2,373
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View attachment 86483
Half correct.

I've mistaken 20CU with 24 CU, but look at what he says in the description of Strix Point iGPU: 16 CUs, without Infinity Cache - trades blows with 3050 laptop GPUs.
While showing the slide in which 20CU, 128 bit but WITH Infinity Cache - 3050 perf/W class, presumably existing within that 55W TDP thermal envelope, in which Strix Halo should exist on the lower end side.

He has slides that say one thing, and he carries on to report something completely different.
There is discrepancy, true, but look what TDP that RTX 3050 has. Only 35W!

35W RTX 3050 has only 713MHz base and 1058MHz turbo, that's very very low.
Strix Point IGP needs 20-30% higher clocks to match It, that's only 1270-1375Mhz.

For comparison: RX 6550M(RDNA2) has 16CU and 2560MHz boost, 16MB IC and 144GB/s.
With basically ~1/2 clockspeed 102-136.5GB/s(6.4-8.53gbps) should be enough to feed both IGP and CPU in Strix Point.

P.S. If Strix Point had enough BW, then at 2.6GHz It could go even against RTX 4050 35W.
 
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CakeMonster

Golden Member
Nov 22, 2012
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Speaking for myself.... Since I know AMDs reputation as of late (the last 6 years) of under promising, and overdelivering, and we have one poster that seems to have mostly correct information, I believe the hype.... to a point. I don't care what the reputation of these youtube clowns is, if they are close the what I think is true, then fine.

Absolutely, I don't think various rumors about Z5/Z6 are unreasonable expectations necessarily, AMD seem to be on a very good track.

Its more about calling out certain dishonest actors, as you will get the same idea about rumored performance without them as 'sources' anyway. I don't mind some spicy takes from people who has not proved to have bad character and are not asking for money.
 

CakeMonster

Golden Member
Nov 22, 2012
1,394
503
136
Remembering Ian's interview with Mike Clark back in 2021, he hinted that they were working on Z8 already. I wonder how set in stone those designs are with regards to core count, CCX layout, and b.L setup, because surely the market demands might change in that time period.
 

inf64

Diamond Member
Mar 11, 2011
3,706
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I have the feeling that AMD themselves purposely "leaked" this document in order to curtail the 30%+ IPC claims. 10-15% seems reasonable with the listed changes.
They might have leaked this on purpose, but 10-15% does not seem reasonable according to the listed changes. Zen 4 was a tweak of Zen 3 and got the upper bound of that range. Zen 2 got that range and core itself was not updated with even half of what Zen 5 brings. Zen 5 changes are stratospheric in many aspects and 10-15% is really not what you would expect from such radical bump.
 

HurleyBird

Platinum Member
Apr 22, 2003
2,697
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Assuming that both the "30%+ IPC" and "no way it's going to be 30% IPC" camps are valid, there's an easy explanation:

SMT uplift exceeds ST uplift.

Building a wide core and feeding a wide core are two different matters. But to the extent that Zen5 has difficulty utilizing its wider structures in ST, it should have an easier time utilizing those structures via SMT.
 

TESKATLIPOKA

Platinum Member
May 1, 2020
2,373
2,868
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Assuming that both the "30%+ IPC" and "no way it's going to be 30% IPC" camps are valid, there's an easy explanation:

SMT uplift exceeds ST uplift.

Building a wide core and feeding a wide core are two different matters. But to the extent that Zen5 has difficulty utilizing its wider structures in ST, it should have an easier time utilizing those structures via SMT.
I agree. Core is wider, so enabling SMT should provide a bigger gain in performance.
In that case, IPC gain per core could be higher with enabled SMT than when It is disabled compared to Zen4.
 
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