Review Zen4 3D review thread

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Hitman928

Diamond Member
Apr 15, 2012
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Thread to focus on Zen4 3D cache CPUs.

New gaming king (as most expected), though the 2 CCD 7950x3d does seem to have issues with some games, more than I would expect of it getting stuck on the "wrong" CCD. I imagine it will get cleared up with subsequent updates but we'll see. Simulated 7800X3D showed no such issues and overall has the gaming lead (real product might be slightly slower though depending on in game clocks).


Computerbase also has the 7950x3d as the gaming champ. They (and TPU) also show that efficiency while gaming is extremely good.







Just to toot my own horn a little, it landed spot on with my prediction of fastest gaming CPU but not significantly so over a 13900k on average, but with much higher efficiency.

Additional reviews, will add more later.

Gamers Nexus
 
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Kocicak

Golden Member
Jan 17, 2019
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7950X3D is out of stock about everywhere in Germany ...

The same in Czechia, it was for sale very shortly and then it disappeared everywhere. Availability of 7950X3D is written in multiple shops as "unknown", one shops states the end of march.

Perhaps the 7800X3D is not delayed compared to 7950X3D and 7900X3D, and those 7950X3D and 7900X3D which were/are in the shops are just "limited prelaunch".
 
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inf64

Diamond Member
Mar 11, 2011
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The same in Czechia, it was for sale very shortly and then it disappeared everywhere. Availability of 7950X3D is written in multiple shops as "unknown", one shops states the end of march.

Perhaps the 7800X3D is not delayed compared to 7950X3D and 7900X3D, and those 7950X3D and 7900X3D which were/are in the shops are just "limited prelaunch".
The demand is just too high for the amount of SKUs AMD prepared. I think they were a bit more conservative given the decline in sales for Q4 22. Hopefully they will increase the supply by the end of March.
 
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A lot of people are finally getting the taste of a modern CPU with the V-cache CPUs after several years of holding onto their old systems. What a taste it shall be for them!
 
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MrTeal

Diamond Member
Dec 7, 2003
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I wonder what the rationale is for the 7900X3D as a product, if the added cost of production and the cache die really are significant. Why incur that extra cost on a die that's already cut down?
 
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Joe NYC

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Jun 26, 2021
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I wonder what the rationale is for the 7900X3D as a product, if the added cost of production and the cache die really are significant. Why incur that extra cost on a die that's already cut down?

I think the costs have come way down. AMD is now selling 5800x3d for $299 at Micro Centers in the US, with all stores fully stocked.
 
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ondma

Diamond Member
Mar 18, 2018
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Twin Cities microcenter shows 7950x3D, 4 in stock, for 699.99. Regular 7950x is 588.
So is the x3D worth the extra hundred+ bucks?
TBH, the 7950x3d seems in a tough spot to me. For gaming, probably the 7800x3D will be better (and cheaper), while for heavy productivity it loses to the vanilla 7950x.
 
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Asterox

Golden Member
May 15, 2012
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Sitting on the shelves? or an allocation issue?

AMD finally punished Germans and especially Mindfactory. Mindfactory was selling too many AMD processors and creating a retail bottleneck. The punishment has arrived, 130 000 sold R5 3600 is proof of Mindfactory's insidious business policy.

R9 X3D duo is listed here in Croatia. But if you buy it, the delivery time is hm 3-5 days or maybe even longer.

 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
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Clearly somebody is not listening to the "don't buy" advice
If you are a high end gamer, no amount of money counts ! Look at 4090's ! And people buying the 13900k when it takes twice the power of the 7950x and beats it in games by just 2-5%. The new gaming champ is here and gamers will pay almost anything to get the best.
 

biostud

Lifer
Feb 27, 2003
19,499
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If you are a high end gamer, no amount of money counts ! Look at 4090's ! And people buying the 13900k when it takes twice the power of the 7950x and beats it in games by just 2-5%. The new gaming champ is here and gamers will pay almost anything to get the best.
And to me it is how it should be. As long as we have a functional and competitive market, we can buy what we want at prices it is possible to sell them at. I really hope something can shake up the video card market, but maybe it requires competition at foundry level...
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
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And to me it is how it should be. As long as we have a functional and competitive market, we can buy what we want at prices it is possible to sell them at. I really hope something can shake up the video card market, but maybe it requires competition at foundry level...
I just got a 4090 for $1730 delivered. $1650 MSRP. I'd say its about there.
 

Mopetar

Diamond Member
Jan 31, 2011
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I wonder what the rationale is for the 7900X3D as a product, if the added cost of production and the cache die really are significant. Why incur that extra cost on a die that's already cut down?

I don't know what their production process is, but if they're bonding the v-cache to the base dies in some bulk fashion, they would likely need to bin some of those to hit performance targets.

Another possibility is they've added a dummy product that they only produce is low quantities to make the $700 7950X3D look a lot more attractive by comparison.
 

biostud

Lifer
Feb 27, 2003
19,499
6,558
136
I just got a 4090 for $1730 delivered. $1650 MSRP. I'd say its about there.
I wouldn’t, because AMD has no product that can compete. So the 4090 is a top monopoly. For a market to work there has to be competition and an abundance of produce from different vendors. It is when we see prices from the 4080 and the 7900xtx start dropping below msrp, that the market is working.
 

Joe NYC

Diamond Member
Jun 26, 2021
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I wouldn’t, because AMD has no product that can compete. So the 4090 is a top monopoly. For a market to work there has to be competition and an abundance of produce from different vendors. It is when we see prices from the 4080 and the 7900xtx start dropping below msrp, that the market is working.

I just saw someone posting that 7900 XT is drifting down $100 from MSRP to $799. Which I think is a more natural price for it, between 6950 XT and 7900 XTX.
 
Jul 27, 2020
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I just saw someone posting that 7900 XT is drifting down $100 from MSRP to $799. Which I think is a more natural price for it, between 6950 XT and 7900 XTX.
Or 6950XT stocks are running low. It would look bad to investors if the 7900 XT goes from $899 to $699 suddenly. So they are trying to sell as many 7900 XT above $699 as they can.
 

maddie

Diamond Member
Jul 18, 2010
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I wonder what the rationale is for the 7900X3D as a product, if the added cost of production and the cache die really are significant. Why incur that extra cost on a die that's already cut down?
I think you're answering yourself. The assumptions of the argument can be assumed (that word again) to be wrong.

The added cost is low.

The die cost is already lower than an equivalent area CPU die due to simplified litho (less steps), and the mating process should be quite low cost, once the equipment is properly setup. Thin, align, heat, press. These are mechanical steps which allow fairly easy scaling and high throughput.
 
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MrTeal

Diamond Member
Dec 7, 2003
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I think you're answering yourself. The assumptions of the argument can be assumed (that word again) to be wrong.

The added cost is low.

The die cost is already lower than an equivalent area CPU die due to simplified litho (less steps), and the mating process should be quite low cost, once the equipment is properly setup. Thin, align, heat, press. These are mechanical steps which allow fairly easy scaling and high throughput.
Well, significant is relative I guess. It's still a decent sized piece of silicon on a pretty modern process and a decent cost adder. There also must be some kind of bottlenecking in production, otherwise it's hard to imagine why they wouldn't sell a 7950X3DX2 XTX with cache dies on both CCDs at a halo price point especially given all the effort they needed to spend on core parking during gaming.

The 7900X makes sense as a cut down part, it's obviously worse than a 7950X but outside of a few niche cases it's better in every way than a 7800X. That's not going to be the case going forward, as a gaming CPU the 7900X3D is functionally a 6 core chip and will likely be outperformed by the 7800X3D in some games where you have 8 cores on the single cached CCD.
Why sell fully enabled dies in the 7800X without the 3D cache, but then add cache to cut down dies for the 7900X3D. It's just weird positioning and I'm not sure who the market is for it. If you're primarily gaming, you can get a 7800X3D with probably better performance and save $150. If you can actually use all those cores an extra $100 will step you up to the 7950X3D.
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
26,999
15,952
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Well, significant is relative I guess. It's still a decent sized piece of silicon on a pretty modern process and a decent cost adder. There also must be some kind of bottlenecking in production, otherwise it's hard to imagine why they wouldn't sell a 7950X3DX2 XTX with cache dies on both CCDs at a halo price point especially given all the effort they needed to spend on core parking during gaming.

The 7900X makes sense as a cut down part, it's obviously worse than a 7950X but outside of a few niche cases it's better in every way than a 7800X. That's not going to be the case going forward, as a gaming CPU the 7900X3D is functionally a 6 core chip and will likely be outperformed by the 7800X3D in some games where you have 8 cores on the single cached CCD.
Why sell fully enabled dies in the 7800X without the 3D cache, but then add cache to cut down dies for the 7900X3D. It's just weird positioning and I'm not sure who the market is for it. If you're primarily gaming, you can get a 7800X3D with probably better performance and save $150. If you can actually use all those cores an extra $100 will step you up to the 7950X3D.
My take on it. The whole v-cache thing is to make AMD the gaming king for desktop, for server it has another use. So for desktop, they are now the king. Why spend extra money when it will not change this status ?
 
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