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Poll: Ryzen 7950X3D, 7900X3D, 7800X3D

Will you be purchasing the 7800X3D on the 6th?

  • Total voters
    191
  • Poll closed .
harderthanfire said:
I'm really curious as to why AMD went the route of parking the 2nd CCD instead of doing what people have been doing for a while with multi-CCD chips and pinning the game process to one CCD using a similar method to process lasso. I'd like to think AMD have some special insight but given how their software dev seems to usually happen it's more likely it was just easier this way for them xD
Click to expand...

What causes the latency issue in the performance bottleneck is not running games on multiple CCD's, its moving workload between CCD's, Windows loves to do that, i cannot just recognise that work is being done on a core and just leave it be, it loves to move it, and then move it again... and again.......

With Zen 3 AMD added something that stops windows doing that, Windows wants to move something from core 2 to core 12 and whatever AMD did stops it.

This is different again because now a game needs to run in just one CCD, the one with the 3D Cache, they added something to the drivers to make that happen, tho its not perfect, there are instances where it will run on the CCD without the 3D cache, tho its rare, the only instance i can find of it is the screenshot below, the only way around it is to turn the CCD without the 3D cache off, you can see that in the slide (7800X3D simulated vs 7950X3D) and the difference its made.

MC2d7z2.png
 
Poneros said:
cyberpunk-2077-rt-1280-720.png
Click to expand...
is that 720p ?

who the hell games at 720p these days ?
 
Poneros said:
The difference isn't 9%. That's what I'm saying. And in the worst spots the 7600X chokes hard and you go even below 60 fps. THAT'S the issue, and why you can't just look at reviews and take them at face value. You need experience with the game & scenes. (See @Dave2150 's results in the post linked below the article link)

x4sfmgY.jpg

cyberpunk-2077-rt-1280-720.png


www.techpowerup.com

AMD Ryzen 9 7950X3D Review - Best of Both Worlds

The Ryzen 9 7950X3D is the spearhead of the AMD Zen 4 X3D lineup. In our performance review we test AMD's new 16-core flagship with dozens of applications and 14 games at up to 4K, to see whether AMD can take the performance crown from Intel, how power consumption is affected, and what can be...
www.techpowerup.com www.techpowerup.com

Ryzen 7950X3D, 7900X3D, 7800X3D

You do me a favor? Can you test Cyberpunk 2077 in the tom's dinner area? It's the heaviest area in the game, I wanna see how zen 4 holds up. I know the 3d crumbles. If you want directions how to get there, just ask My R5 7600 is close to 100% all around this area, poor thing! Tried the same...
forums.overclockers.co.uk forums.overclockers.co.uk


Cyberpunk in particular isn't a GPU centric title, it's an everything centric title, because it can use more of whatever you have to feed it and spit out more fps, better image quality, faster loading, more & better AI (esp. with mods) etc.
The 7600X isn't within a few fps of the 7950X3D, in fact in games that most demand more CPU power it's very far from it (see above, but there's plenty of other examples like Forspoken, Hogwarts, Factorio, Borderlands 3, Far Cry 6, Age of Empires 4 etc. the list is huge).

Btw I don't understand this focus on the cost of the 7950X3D, if you only care about the gaming performance then obviously wait for the 7800X3D. You get a 16 core beast because you need/want that many cores, not because it's the best bang for your buck.
Click to expand...

We were talking about 4k Resolution though. Look here. Difference between 7700x and a 7050x3D is 1 fps. I have a 7600x and notice no significant drops. It's ok to just want the best of the best in absolute terms but it's also true to admit objectively for 4k gaming is terrible value for money, much more so than comparable high end graphics cards (say the 4090, that offers a real performance improvement for the money).

 
Last edited:
humbug said:
What causes the latency issue in the performance bottleneck is not running games on multiple CCD's, its moving workload between CCD's, Windows loves to do that, i cannot just recognise that work is being done on a core and just leave it be, it loves to move it, and then move it again... and again.......

With Zen 3 AMD added something that stops windows doing that, Windows wants to move something from core 2 to core 12 and whatever AMD did stops it.

This is different again because now a game needs to run in just one CCD, the one with the 3D Cache, they added something to the drivers to make that happen, tho its not perfect, there are instances where it will run on the CCD without the 3D cache, tho its rare, the only instance i can find of it is the screenshot below, the only way around it is to turn the CCD without the 3D cache off, you can see that in the slide (7800X3D simulated vs 7950X3D) and the difference its made.

MC2d7z2.png
Click to expand...
Factorio situation is due to Xbox game bar not recognising it as a game workload. That potentially can be fixed by telling Xbox game bar that Factorio is a game in options ;)
 
humbug said:
What causes the latency issue in the performance bottleneck is not running games on multiple CCD's, its moving workload between CCD's, Windows loves to do that, i cannot just recognise that work is being done on a core and just leave it be, it loves to move it, and then move it again... and again.......

With Zen 3 AMD added something that stops windows doing that, Windows wants to move something from core 2 to core 12 and whatever AMD did stops it.

This is different again because now a game needs to run in just one CCD, the one with the 3D Cache, they added something to the drivers to make that happen, tho its not perfect, there are instances where it will run on the CCD without the 3D cache, tho its rare, the only instance i can find of it is the screenshot below, the only way around it is to turn the CCD without the 3D cache off, you can see that in the slide (7800X3D simulated vs 7950X3D) and the difference its made.

MC2d7z2.png
Click to expand...
Pretty sure for this benchmark they forgot/didn't tell Xbox game bar that Factorio is a game so it was running on the wrong CCD. You can also just use process lasso to stop this kind of unwanted windows behaviour, I do it for some games on my 5950X as the swapping between CCDs makes things painful in some games. Also according to level1tech it's much easier/more hassle free on linux, no installing 400 things and needing to keep xbox game bar installed etc.
 
harderthanfire said:
Pretty sure for this benchmark they forgot/didn't tell Xbox game bar that Factorio is a game so it was running on the wrong CCD. You can also just use process lasso to stop this kind of unwanted windows behaviour, I do it for some games on my 5950X as the swapping between CCDs makes things painful in some games. Also according to level1tech it's much easier/more hassle free on linux, no installing 400 things and needing to keep xbox game bar installed etc.
Click to expand...

Again good point on the game bar thing.

Its not difficult or a choir to install XBox Game Bar, its not a bad tool, if you have XBox Game Pass or even just an XBox controller its quite useful.
 
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harderthanfire said:
Freq max is 5.25ghz on the v cache CCD on the 7950X - multiple outlets have reported this. Whilst the 7800X3D according to AMD's own page has a max of 5.0ghz.

There is no way a chip of the same architecture with the same amount of V cache but lower clocks is going to out perform a chip of the same but with higher clocks.
Click to expand...

I don't agree at all.

A source for 5.25GHz: https://videocardz.com/newz/amd-ryzen-9-7950x3d-has-been-overclocked-to-5-9-ghz-and-delidded?

tmp.jpg


And there's HWUB testing the cached chiplet.

tmp.png


I look at what the cached chiplet max is hitting and it's showing a guarantee of 5GHz just like the 7800X3D.

One core hitting 5.25Ghz does not make it a 5.25GHz chiplet.
 
Hotwired said:
I don't agree at all.

A source for 5.25GHz: https://videocardz.com/newz/amd-ryzen-9-7950x3d-has-been-overclocked-to-5-9-ghz-and-delidded?

tmp.jpg


And there's HWUB testing the cached chiplet.

tmp.png


I look at what the cached chiplet max is hitting and it's showing a guarantee of 5GHz just like the 7800X3D.

One core hitting 5.25Ghz does not make it a 5.25GHz chiplet.
Click to expand...
Tech power up have all cores at over 5ghz up until you load 30 threads or so here: https://www.techpowerup.com/review/amd-ryzen-9-7950x3d/27.html

The 5.25ghz on the v cache CCD is the freq max set by AMD, not all chips will hit that. It's gonna depend on cooling, motherboard/vrm etc just like any other chips. But saying it is limited to 5ghz is just wrong, that's not what the freq max is set to.
 
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