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

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Saylick

Diamond Member
Sep 10, 2012
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gdansk

Platinum Member
Feb 8, 2011
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I don't really follow it; but in the other thread they are saying 'Lion Cove' which is in Arrow Lake which is to launch this fall has 20-25% IPC improvement. So things should be competitive if that's true. Why worry about price increase of Zen 5 then.
 

FlameTail

Diamond Member
Dec 15, 2021
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What will be the minimum TDP of Strix Halo?

The leaked 125W is the maximum configurable TDP I believe?

The issue with 125W is that it's too high to fit in some existing laptop designs (even ones with dGPUs) like the XPS 16 for instance, which tops out at just 80W device TDP.
 

adroc_thurston

Diamond Member
Jul 2, 2023
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The leaked 125W is the maximum configurable TDP I believe?
No it's stock.
The issue with 125W is that it's too high to fit in some existing laptop designs (even ones with dGPUs) like the XPS 16 for instance, which tops out at just 80W device TDP.
It's not made for existing laptops at all.
Shame that the IPC uplift is getting nullified by the clock regression
It clocks the same or slightly faster than MTL so not really a regression per se.
 

Saylick

Diamond Member
Sep 10, 2012
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It clocks the same or slightly faster than MTL so not really a regression per se.
Sure sure, but it’s a 20% regression relative to Raptor Lakes 6 GHz, thus ST performance isn’t much different than Raptor Lake overall. Power consumption ought to be better due to lower clocks and better process of course, but in the desktop space consumers are already conditioned to 170W TDP. The appeal of Raptor Lake performance in a 135W TDP pales in comparison to +30% at the same 170W.
 
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Saylick

Diamond Member
Sep 10, 2012
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It's not really 20% at all.
You're still getting your 1t wins, they're just not huge.

High single digits better.
Not good enough in this comp env but it is what it is.
I guess you're right in that Intel HAS to market some kind of advantage of ARL over RPL, otherwise what's the point?

Just sad that they could only muster a few % points improvement, but to be honest, I'm totally cool with AMD gaining more market share for a few generations only because I know that in the grand scheme of things, the Intel-AMD market share needle is still very far from 50-50, which is where I believe it needs to be for maximum consumer benefit from a competition point of view.
 
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adroc_thurston

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Jul 2, 2023
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I'm totally cool with AMD gaining more market share for a few generations only because I know that in the grand scheme of things
no you don't.
you don't...
the Intel-AMD market share needle is still very far from 50-50
You have to understand that Intel maintains their MSS by spending money in opex.
If AMD gets to 50% marketshare with their ever-increasing margin targets then Intel could as well be written off into history.
 

Gideon

Golden Member
Nov 27, 2007
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I'm all for Zen 5 being great, but honestly I'm a bit confused about the recent twitter hypetrain (not to mention adroc).

How exactly is it going to "instantly make everything older obsolete" or be "almost a Conroe level jump" ?

Let's look at what we know:
  • AFAIK Most of the hypers tend to agree that the leaked architecture slides from AMD are correct. Yet seem to think the actual gains are bigger than the 15% mentioned (some say 20% some ~30-35%).
  • Those changes essentially make it a bit wider and better executed Golden Cove. Now I know AMD has managed to extract way more out of a similar-width CPU than Intel, but nothing from that leaks is anywhere near a "Conroe level" upgrade:
    • There are also no packaging, uncore or major I/O changes. The same I/O die probably limited to the same bandwidth /latency numbers as Zen 4.
    • The FPU part looks beefed up, but that has very little relevance to the general user, outside of benchmarks.
  • And there will be a ~200 Mhz frequency drop.

So what is that "secret Conroe sauce" that causes people to hype it endlessly (provided there is any)?

If I had to bet, I'd wager it's some sort of architectural change not yet listed that will disproportionately affect some workflows:
  • A godly new branch predictor?
  • A radically different way to built the ROB buffer? That would allow a way bigger OoO windows in some scenarios (there have been some papers on that).

It better be something like that, or like a 40% IPC increase, otherwise the hype-train just seems .... stupid. Zen 4 also ended up roughly 30% faster and definitely didn't make older stuff useless (e.g. 5800 X3D). Yeah, i know it was mostly clocks, but the average Joe doesn't care.
 

SteinFG

Senior member
Dec 29, 2021
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@Gideon Agree that there is no basis for those people to be this hyped. I wouldn't be disappointed if I saw something similar to "Zen2->Zen3" ipc jump, and anything higher is a bonus. Also Uncore is changed, there's improvements in L3 cache / Ringbus.
 
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