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

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Joe NYC

Platinum Member
Jun 26, 2021
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It's not? Neither -H nor -U is 4+4+4 for the full product.

EDIT: oh you meant 4P + 4LP-E + 4Xe

Yes, I found the post in question I meant from by @Tigerick with both configurations.

So it seems Intel may have a chip to compete with AMD notebook chips (in 2025) but I don't see anything on the horizon for desktop from Intel. Maybe @adroc_thurston could be right and Intel is out of the competition on desktop until 2026
 

Ghostsonplanets

Senior member
Mar 1, 2024
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Even if only for laptops it seems underpowered to face Zen 5, even if Strix was to use Zen 4 cores it would still be challenging for Intel given that they seem to remove HT and also due to either the sheer amount of cores in Strix or the augmented IPC relatively to Zen 4 in Kraken.
A certain someone already said that Cougar isn't a big improvement/optimization over Lion. So indeed PTL won't compete with Strix/Kraken in ST and MT.

However, PTL is a much better fight than ARL-U or ARL-H. Honestly, I finally understood why Intel has been talking so much about it ahead of ARL and LNL. It's probably the sanest mobile design from Intel since TGL.

It reduces external dependency, bring RibbonFET and PowerVia efficiency for increased battery life and also finally brings back Intel Graphics to Intel Foundry.

It will fall short against Strix and Kraken and also AMD will have a year and half headstart over PTL. But PTL will be a decent product from what we know so far.

As I said, if I were Gelsinger, I would fast track PTL to come in Q3 25 at volume. Coming in volume at CES 26 will be a bad idea given it would have to fight against STX+1 and KRK+1.
 

Ghostsonplanets

Senior member
Mar 1, 2024
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That's called Medusa.
But yeah Intel client position is kinda tough, they bet on expensive underwhelming parts.
Wait...You mean Z6 will come to mobile first in 26? Huh, interesting to see AMD accelerating the cadence on mobile.

So Z6 Core IP + RDNA 5 GFX and XDNA 3 for STX/KRK + 1? That's quite scary (For the competition😁)
 

Mahboi

Senior member
Apr 4, 2024
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Wait...You mean Z6 will come to mobile first in 26? Huh, interesting to see AMD accelerating the cadence on mobile.
I'm pretty sure the point of Strix Halo is to beta test their advanced packaging and LP cores so they can dip their toes in the future of mobile.
Makes sense that they shoot for mobile first after that when Z6 comes out.
So Z6 Core IP + RDNA 5 GFX and XDNA 3 for STX/KRK + 1? That's quite scary (For the competition😁)
RDNA 5?
In APUs?
 
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Ghostsonplanets

Senior member
Mar 1, 2024
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Makes sense that they shoot for mobile first after that when Z6 comes out.
Oh, it does. I was just surprised that they'll go directly into Zen 6 in 2026. Was expecting a Zen 5 refresh. AMD is being very aggressive with their timelines (As they should be).
RDNA 5?
In APUs?
RDNA 4 will be a dGPU only generation*. So STX+1 at least should implement RDNA 5, no? Specially given Intel will go with Celestial in PTL.

* I actually wonder if Exynos Dream won't implement mRDNA 4. Or maybe they'll jump directly to mRDNA 5 (if the IP was ready for 2025, which is unlikely).
 

Mahboi

Senior member
Apr 4, 2024
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Oh, it does. I was just surprised that they'll go directly into Zen 6 in 2026. Was expecting a Zen 5 refresh. AMD is being very aggressive with their timelines (As they should be).
If memory serves the point of Z5 is to be the big Tock, while the point of Z6 is to take care of the uncore. Clearly between new packagings, LP cores mixins, whatever multiple packagings they will have for server, client and mobile, it makes sense to go for the full package and for Z6 core to be the tick directly.
RDNA 4 will be a dGPU only generation*. So STX+1 at least should implement RDNA 5, no? Specially given Intel will go with Celestial in PTL.
I guess...but the rumour was RDNA 3.5 until 2027. It is the new Vega, in every way. Little CUs all over the APUs.
I also haven't heard a single thing regarding RDNA 4.5 anymore. Feels like it went up in smoke, like tears in the rain.
 
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Ghostsonplanets

Senior member
Mar 1, 2024
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If memory serves the point of Z5 is to be the big Tock, while the point of Z6 is to take care of the uncore. Clearly between new packagings, LP cores mixins, whatever multiple packagings they will have for server, client and mobile, it makes sense to go for the full package and for Z6 core to be the tick directly.
Right, that make sense. Specially with the unification of DT and Mobile into Client.
I guess...but the rumour was RDNA 3.5 until 2027. It is the new Vega, in every way. Little CUs all over the APUs.
I also haven't heard a single thing regarding RDNA 4.5 anymore. Feels like it went up in smoke, like tears in the rain.
Was the rumor that AMD would use only RDNA 3.5 until 2027 or that 3.5 will keep appearing in the SKU line-up until 27? There's a important difference here.

For example,Vega GFX IP is still part of AMD "current" line-up with Barcelo-R (7730, 7530, etc). But AMD introduced newer GFX IPs in the meantime. I would be very surprised if AMD stand still.

But if it's the case that Medusa keeps 3.5 IP, it won't be the end of the world. 3.5 will still be a class leading IP and with adoption of LPDDR6/LPDDR5X 10700, AMD could certainly afford to go wider to counteract newer competitor GFX IP. Wouldn’t be surprised if Medusa brings a 20 CU RDNA (Whatever the IP version is) iGFX.
 

Mahboi

Senior member
Apr 4, 2024
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Right, that make sense. Specially with the unification of DT and Mobile into Client.

Was the rumor that AMD would use only RDNA 3.5 until 2027 or that 3.5 will keep appearing in the SKU line-up until 27? There's a important difference here.
It was a brief tweet in Korean, little details. But there is no reason to think that it will be ONLY RDNA 3.5 indeed.
I suspect that KRK and all lower cost SKUs will use it extensively. I have no opinion on whether it'll be replaced in APUs by RDNA 5, it's totally possible.
The real question to me is more about whether it's a worthwhile investment to do so for AMD. APUs may be far and wide touted as cool, we divided CPU and GPU for a reason and that reason was bandwidth (and arch and power and tons of things, but let's stick to bandwidth).

Assuming that RDNA 3.5 doesn't have a serious lack of bandwidth with Strix Halo, so 40 CUs, you have to question what's the point where RDNA 5 is really worthwhile for APUs.
Would that be with an APU with more than 40 CUs? As many or nearby CU count, but with RDNA 5 offering more performance?

When do we reach the limits of compute being blown out of proportion without dedicated fast local memory?
If somehow Halo still has some elbow room with LPDDR5x (if that's even the RAM they'll use), I wonder when do we reach a point where you're better off using the faster RDNA 5 over cheap & smol RDNA 3. If you never reach the limit sure, go wild, but I wonder if we're not going to reach it pretty soon.
For example,Vega GFX IP is still part of AMD "current" line-up with Barcelo-R (7730, 7530, etc). But AMD introduced newer GFX IPs in the meantime. I would be very surprised if AMD stand still.

But if it's the case that Medusa keeps 3.5 IP, it won't be the end of the world. 3.5 will still be a class leading IP and with adoption of LPDDR6/LPDDR5X 10700, AMD could certainly afford to go wider to counteract newer competitor GFX IP. Wouldn’t be surprised if Medusa brings a 20 CU RDNA (Whatever the IP version is) iGFX.
If they get faster RAM, it could easily justify dropping the older uarch.
Then there's the second question, which is branding. You don't want to have an unreadable mishmash of product lines. See Intel and their Xe Iris vs UHD Graphics.
I can easily envision a "Strix-Next" be RDNA 5 with special packaging and a big Gamer™ name for consumers. But if you start having "Ryzen 3-5 is RDNA 3, Ryzen 7-9 is RDNA 5", someone at marketing might moan.
Nothing impossible of course, but it's a thing to consider. We already don't know why RDNA 4.5 was fully canceled for mobile, so I wouldn't be surprised if they wanted to simplify branding too.
 

carancho

Member
Feb 24, 2013
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What should we expect the difference in ST integer and floating point performance to be between Strix Point and Halo? Would its cache and extra bandwidth also help those kinds of operations, besides NPU and GPU workloads?
 

itsmydamnation

Platinum Member
Feb 6, 2011
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What should we expect the difference in ST integer and floating point performance to be between Strix Point and Halo? Would its cache and extra bandwidth also help those kinds of operations, besides NPU and GPU workloads?
IF we are just talking CPU ignoring GPU its super workload specific , generally expect 0-5% more ipc. there will be outliers , gaming or specific games / engines being one of those.
 

carancho

Member
Feb 24, 2013
26
12
81
IF we are just talking CPU ignoring GPU its super workload specific , generally expect 0-5% more ipc. there will be outliers , gaming or specific games / engines being one of those.
So besides the larger RAM, there would not be much point in choosing Halo over Strix Point for professional applications. Thanks!
 

itsmydamnation

Platinum Member
Feb 6, 2011
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So besides the larger RAM, there would not be much point in choosing Halo over Strix Point for professional applications. Thanks!
Depends , if the working set is large it can have a big impact. Like if your a guy who when you go CTL alt f9 in excel your waiting for minutes then it probably will make a noticeable difference.
 

carancho

Member
Feb 24, 2013
26
12
81
Depends , if the working set is large it can have a big impact. Like if your a guy who when you go CTL alt f9 in excel your waiting for minutes then it probably will make a noticeable difference.
Why, though? Excel is never RAM-bound even in the most obscene workbook. It is easily and often compute-limited. Why would Halo make a difference in that scenario?
 
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