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

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Fjodor2001

Diamond Member
Feb 6, 2010
3,835
297
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How it works, what ODMs pay, is exactly the same situation as with Intel, Nvidia, any other company on the market.

You have confused two different markets, on which the retail has much higher markup, compared to OEM
You're suggesting AMD will price 9950X differently depending on what the company that buys it will do with it?

I.e. different price depending on whether the company that buys it will place it in a desktop PC and sell that PC to a customer, vs sell it as a separate CPU to a customer, vs throw it in the trash, or whatever?
 

Fjodor2001

Diamond Member
Feb 6, 2010
3,835
297
126
Strix Halo will never be sold via retail directly due to the 256b memory bus.

It will always have to go through ODMs. That's still treated as "sold through ODMs", not sold through retail. You're not making sense.
Never claimed Strix Halo will be sold directly to end customer. But end product (e.g. laptop) which contains that CPU will always be sold through retail. Unless the ODM will keep it for themselves. 🤣

Once again, you're correlating ODM prices with retail prices, whilst simultaneously saying the two aren't compatible. Make up your mind.

Unless you're living in some fantasy land where you think Strix Halo (a niche product) will be sold in AIOs or mini PCs (a highly niche market) at a low price. If that's the case, I can't help you.
No. It's you that are comparing the price that ODMs pay for Strix Halo when buying directly from AMD, to 9950X end customer retail price. Which is not fair and does not make sense at all.

Why don't you instead answer this question that you tried to avoid:

But you could of course argue that ODMs will pay less for Strix Halo than for 9950X when they buy those CPUs from AMD. Is that's what you're saying, and in that case why do you think that would be reasonable when Strix Halo has lots of extras compared to 9950X?
 
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uzzi38

Platinum Member
Oct 16, 2019
2,662
6,163
146
Never claimed Strix Halo will be sold directly to end customer. But end product (e.g. laptop) which contains that CPU will always be sold through retail. Unless the ODM will keep it for themselves. 🤣


No. It's you that are comparing the price that ODMs pay for Strix Halo when buying directly from AMD, to 9950X end customer retail price. Which is not fair and does not make sense at all.

Why don't you instead answer this question that you tried to avoid:

But you could of course argue that ODMs will pay less for Strix Halo than for 9950X when they buy those CPUs from AMD. Is that's what you're saying, and in that case why do you think that would be reasonable when Strix Halo has lots of extras compared to 9950X?
If the final retail price for a 9950X is $999, ODMs won't be paying anywhere near that much. You have no clue how large the disparity is between retail sold parts and the prices ODMs pay.

No, I don't think ODMs will be paying less for Strix Halo than they will for Fire Range. I just also don't think they'll be paying as much for a Fire Range as you seem to think they will.
 

Abwx

Lifer
Apr 2, 2011
11,041
3,690
136
Never claimed Strix Halo will be sold directly to end customer. But end product (e.g. laptop) which contains that CPU will always be sold through retail. Unless the ODM will keep it for themselves. 🤣


No. It's you that are comparing the price that ODMs pay for Strix Halo when buying directly from AMD, to 9950X end customer retail price. Which is not fair and does not make sense at all.

Why don't you instead answer this question that you tried to avoid:

But you could of course argue that ODMs will pay less for Strix Halo than for 9950X when they buy those CPUs from AMD. Is that's what you're saying, and in that case why do you think that would be reasonable when Strix Halo has lots of extras compared to 9950X?

Take a retail sold boxed CPU price and divide by say 2.6 and you ll get the price paid by OEMs in trail versions, so even a CPU sold at say 999$ in the retail market wont cost more than something like 380$ for an OEM, and even at this price that would be a bonanza for AMD.
 

FlameTail

Platinum Member
Dec 15, 2021
2,356
1,276
106
Why are you guys only talking about 16C Zen 5 + 40 CU RDNA3.5 for Strix Halo? That's only the top configuration. There will certainly be cut down parts.

If Strix Halo uses Zen 5 CCDs, it means there is a possibility to have only one CCD; 8C Zen5 + 40 CU RDNA3.5 SKU. Such an SKU would be perfect for a gaming laptop.
 

Joe NYC

Platinum Member
Jun 26, 2021
2,051
2,553
106
…akin to the Zen 4 CCD's readiness for MI300A packaging.


Expected by whom? To me, it seems as it would be an economically difficult venture to sideline this chip off of premium laptops to a product category such as x86 SFF PCs. (Does a category of "premium SFF PCs" even exist in x86 land? That's the land in which customers who require workstation PCs can actually buy workstation PCs, rather than having to make do with SFF PCs.)

Exactly. Apparently, only some of the metal layers were modified to make it possible to attach the CCD to Mi300a TSVs.

So, this may be similar plan for Zen 5 CCD, to modify the bottom metal layers so that it can be used with fanout / RDL type packaging for Strix Halo. Which is a small fraction of effort (and money) it would take to design and produce whole new 8 core Zen 5c CCD.
 

Ghostsonplanets

Senior member
Mar 1, 2024
386
658
96
Why are you guys only talking about 16C Zen 5 + 40 CU RDNA3.5 for Strix Halo? That's only the top configuration. There will certainly be cut down parts.

If Strix Halo uses Zen 5 CCDs, it means there is a possibility to have only one CCD; 8C Zen5 + 40 CU RDNA3.5 SKU. Such an SKU would be perfect for a gaming laptop.
There's probably only one GPU Chiplet (Although MLID had eons ago that Strix Halo would go as low as 6C + 20 CU). So the max I expect for a cutdown version would be 8C Z5D + 32/36 CU.
 

Joe NYC

Platinum Member
Jun 26, 2021
2,051
2,553
106
The analysis *really* depends on how AMD decides to construct the thing. Strix Point suggests the existence of an 8c Zen5c CCX (assuming its 4+8 config isn't all implemented on one big, shared CCX). It could be that for Strix Halo, there's, for example, an 8 core Zen5c CCX sharing the same die as the memory controller, in addition to a regular 8c Zen5 chiplet which then might not even need any kind of advanced packaging.

AMD probably has a block either 4c Zen 5c or 8c Zen 5c to be used as part of various mobile dies. Meaning, to be included on a die that provides the communication links to memory controllers on the same die. Which is different from having a standalone die.

Which brings up another question, if there is enough incentive for, or if AMD wants to experiment with a whole new Zen 5 die that ditches the silicon for GMI links alltogether and optimizes for RDL / fanout design.

That would be a bigger investment, but it would preparation for Zen 6 type designs. An optimized design of Zen 5 die could highlight new tradeoffs, new possibilities with new packaging.

But again, if they do it, they will do it for only one chiplet, not 2 different ones.

Mi300 uses unmodified Zen4 CCDs, so not necessarily. Although I'd be a bit surprised if STH went vertical.

Well, the silicon was apparently unmodified, most of the critical metal layers were not modified, and only the bottom layers were modified. So as a chip or a die or a CCD, it is a different CCD.

In case of Strix Halo, the connection will (according to all rumors) be horizontal - 2.5D rather than 3D.
 

Joe NYC

Platinum Member
Jun 26, 2021
2,051
2,553
106
Why are you guys only talking about 16C Zen 5 + 40 CU RDNA3.5 for Strix Halo? That's only the top configuration. There will certainly be cut down parts.

If Strix Halo uses Zen 5 CCDs, it means there is a possibility to have only one CCD; 8C Zen5 + 40 CU RDNA3.5 SKU. Such an SKU would be perfect for a gaming laptop.

You would think that AMD would introduce a version with a single Zen 5 CCD, and even more specifically, a single Zen 5 CCD with V-Cache to target gaming.

But that would make too much sense for AMD marketing...
 
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Gideon

Golden Member
Nov 27, 2007
1,665
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Would be awesome if all of this is true (and we know that many of the specs are accurate), but looking at all the data in unison, it looks like someones wet dream.

Anyway, considering the release date, it will go against Arrow Lake and Nvidia 5xxx series. So I guess that would be the expected performance ballpark to be very-competitive
 

FlameTail

Platinum Member
Dec 15, 2021
2,356
1,276
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Why is AMD using 32-bit LPDDR packages?
Won't be more cost & space efficient to use 64-bit or even 128-bit packages?

Apple uses 4 memory packages for M3 Max, which is a 512 bit chip. That means each memory package is 128 bit.
 

Gideon

Golden Member
Nov 27, 2007
1,665
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Only 20-25% ipc uplift?
AFAIK even some sources that claimed 35+% in SPEC mentioned that Cinebench is ~20% uplift only.

Cinebench is really outliving its as a representative of a quick and decent MT benchmark for modern CPUs (similarily to CPU-Z long before it). It's a rather unique workflow that doesn't match as well to other CPU intensive tasks as it used to. Particularily now when actual renders in Cinema 4D are mostly done on GPUs.

Chips and Cheese has an excellent article about it:

Cinebench has been really popular for ages as it's free, runs relatively quickly and shows a pretty picture while successfully pegging your CPU to 100%. And i'ts been popular way longer than some claim. There is some odd consensus as it's rise to fame was only when AMD used it to demo Zen 1, when it was really widely used at least since the Athlon64 / Core 2 days.

A strong point of Cinebench is that it runs well on most PCs, be it Macos + ARM, Snapdragon + Windows or AMD / intel. I really wish we'd get something new in addition to it. Geekbench is fine, but it's ultra-light (as it's also needs to run on phones) and less useful for high core-count parts since version 6. I'd want something in addition to it. Something that would really stress PCs and melt phones
 
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SteinFG

Senior member
Dec 29, 2021
443
507
106
Why is AMD using 32-bit LPDDR packages?
Won't be more cost & space efficient to use 64-bit or even 128-bit packages?

Apple uses 4 memory packages for M3 Max, which is a 512 bit chip. That means each memory package is 128 bit.
What do you mean, "AMD"? They make processors, not memory. It's ODM that uses 32 bit wide memory packages (x32). Steam Deck OLED for example is using x64 chips. My main guess as to why most ODMs opt to use x32 is that lower pad count chips have lower PCB quality requirements. Apple goes around this by implementing memory directly on the soc package
 

Goop_reformed

Member
Sep 23, 2023
173
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76
AFAIK even some sources that claimed 35+% in SPEC mentioned that Cinebench is ~20% uplift only.

Cinebench is really outliving its as a representative of a quick and decent MT benchmark for modern CPUs (similarily to CPU-Z long before it). It's a rather unique workflow that doesn't match as well to other CPU intensive tasks as it used to. Particularily now when actual renders in Cinema 4D are mostly done on GPUs.

Chips and Cheese has an excellent article about it:

Cinebench has been really popular for ages as it's free, runs relatively quickly and shows a pretty picture while successfully pegging your CPU to 100%. And i'ts been popular way longer than some claim. There is some odd consensus as it's rise to fame was only when AMD used it to demo Zen 1, when it was really widely used at least since the Athlon64 / Core 2 days.

A strong point of Cinebench is that it runs well on most PCs, be it Macos + ARM, Snapdragon + Windows or AMD / intel. I really wish we'd get something new in addition to it. Geekbench is fine, but it's ultra-light (as it's also needs to run on phones) and less useful for high core-count parts since version 6. I'd want something in addition to it. Something that would really stress PCs and melt phones
Well tbh this doesn't seem good to me even though cb is at the lower end. I'll still settle for anything >30% though.
 

Gideon

Golden Member
Nov 27, 2007
1,665
3,779
136
now also on Videocardz:


Overall a pretty impressive chip. Here it is compared to the RX 7700 XT , RX 6800 and RX 6850 XT

Strix HaloRX 7700 XTRX 6800RX 6750 XTRX 7600 XT
ArchRDNA 3.5RDNA 3RDNA 2RDNA2RDNA 3
CUs (Compute Units)4054604032
Boost Clock~3 Ghz2.54 GHz2.1 GHz2.6 GHz2.75 Ghz
LLC (Last Level Cache)32 MB48 MB128 MB (half the BW)96 MB (half BW)32 MB
Memory bandwidth273GB/s432.0 GB/s512.0 GB/s432 GB/s288.0 GB/s
TDP140W (without memory but shared with CPU)245 W250 W250 W190 W

If the specs hold up, it has:
  • 13% less (theoretical) compute resources vs the desktop RX 7700 XT
  • 47% less memory bandwidth than the desktop 7700 XT
  • 33% less LLC tham the desktop RX 7700 XT
Considering the RX 6750 XT is about 13% slower than the RX 7700 XT. At best case, Strix Halo should perform in the ballpark at @ 1080p. If the clocks are accurate it should at least beat desktop RX 7600 XT accross the board (more compute similar memory BW).

I also do hope that RDNA 3.5 has some RT improvements vs RDNA 3 (as seems to be the case for the PS5 Pro GPU at least)

EDIT:
Corrected bandwidth figures (and conclusions based on that)
 
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Abwx

Lifer
Apr 2, 2011
11,041
3,690
136
Well tbh this doesn't seem good to me even though cb is at the lower end. I'll still settle for anything >30% though.
If that s real numbers and not speculations then the perf improvement, not IPC, would be 26% in ST and 28% in MT for CB R23, if they targeted a bigger push in INT that would make sense because servers rely mainly on this kind of code.
 

Timorous

Golden Member
Oct 27, 2008
1,668
2,935
136
now also on Videocardz:


Overall a pretty impressive chip. Here it is compared to the RX 7700 XT , RX 6800 and RX 6850 XT

Strix HaloRX 7700 XTRX 6800RX 6750 XT
ArchRDNA 3.5RDNA 3RDNA 2RDNA2
CUs (Compute Units)40546040
Boost Clock~3 Ghz2.54 GHz2.1 GHz2.6 GHz
LLC (Last Level Cache)32 MB48 MB128 MB (half the BW)96 MB (half BW)
Memory bandwidth~500 GB/s432.0 GB/s512.0 GB/s432 GB/s
TDP140W (without memory but shared with CPU)245 W250 W250 W

If the specs hold up, it has:
  • 13% less (theoretical) compute resources vs the desktop RX 7700 XT
  • 15% more memory bandwidth than the desktop 7700 XT
  • 33% less LLC tham the desktop RX 7700 XT
Considering the RX 6750 XT is about 13% slower than the RX 7700 XT I'd guess Strix Halo would perform overall similarily . Perhaps a few percent faster @ 1080p and slightly slower @ 440p (due to smaller cache).

I'm particularly impressed by the memory bandwith. Thats the same that may desktop Radeon 6800 gets with a 256 bit GDDR6 bus (though at conservative clocks). And the performance won't be that far off. quite an achievement indeed.

If RDNA 3.5 has some RT improvements vs RDNA 3 (as seems to be the case for the PS5 Pro GPU at least) it could even rival it in some modern titles.

I presume that bandwidth figure is effective bandwidth like on the 7600XT rather than pure memory bandwidth.

EDIT: The maths works out to 8533 RAM on a 256 bit bus would be around 273GB/s of bandwidth so a bit more than the 7600XT.
 

leoneazzurro

Senior member
Jul 26, 2016
944
1,503
136
If that s real numbers and not speculations then the perf improvement, not IPC, would be 26% in ST and 28% in MT for CB R23, if they targeted a bigger push in INT that would make sense because servers rely mainly on this kind of code.
One should also see how limited is the single core clock in a mobile (premium) chip compared to the desktop version. I suspect not much, but not negligible. Again, if these numbers are real and not speculation.
 

Gideon

Golden Member
Nov 27, 2007
1,665
3,779
136
I presume that bandwidth figure is effective bandwidth like on the 7600XT rather than pure memory bandwidth.

EDIT: The maths works out to 8533 RAM on a 256 bit bus would be around 273GB/s of bandwidth so a bit more than the 7600XT.
Makes much more sense , I'll fix that in my table
 
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