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OcUK Ryzen 7000X3D series review thread

Caporegime
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Ryzen 9 7950X3D


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Seems there are scheduling problems with Windows 11!

Nb5J3hU.png
JsQZNEq.png
nImVuJl.png

 
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5CqwSV3.png
 
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Seems there are scheduling problems with Windows 11!

Nb5J3hU.png
JsQZNEq.png
nImVuJl.png

Need to use Xbox game bar and set the windows power profile to balanced. The 7950X3D is faster than the 7800X3D so not going to see it at the top.
 
Need to use Xbox game bar and set the windows power profile to balanced. The 7950X3D is faster than the 7800X3D so not going to see it at the top.

It's the wrong CCD being used. Instead of Windows using the one with the 3D V-Cache,its putting the load onto the other CCD. It's quite obvious looking at the Factorio and SOTTR results. The Ryzen 7 5800X3D was significantly faster than the Ryzen 7 5800X in these titles despite lower clockspeeds:
 
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It's the wrong CCD being used. Instead of Windows using the one with the 3D V-Cache,its putting the load onto the other CCD. It's quite obvious looking at the Factorio and SOTTR results. The Ryzen 7 5800X3D was significantly faster than the Ryzen 7 5800X in these titles despite lower clockspeeds:
Correct. Use the game bar and the right power setting and it will switch off the high frequency CCD during gaming. Otherwise they sit there active taking processes.
 
Why do you need to use the gamebar? Just out of interest as I don’t know.

Isn’t it just an overlay / capture program ?
 
As expected, the perf/watt of Zen4 3D is far far better than Intel's brute force P4-style approach:
1MqQw9l.png

Since gaming doesn't generally max out the whole CPU that is a very impressive result.


TPU also perf/watt charts:
tbCYsUh.png
The charts on their next page are actually more interesting: ETs5LLe.png

but W1zzard didn't do a perf/watt per app so it would take a lot more work to do that.

CB did go a bit into memory tuning:
vxdFcAT.png
Looks like untuned vs tunes they only got 4% which isn't huge. But then I suspect that the 13900KS can be tuned better but I admire Zen 3D for its plug-and-play simplicity.
 
Why do you need to use the gamebar? Just out of interest as I don’t know.

Isn’t it just an overlay / capture program ?
Game bar is used as part of Windows' Game mode application detection and manual overriding via Win+G

 
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Interesting, thanks I never knew that.

It never used to be this complicated I’m sure of it…!
 
Interesting, thanks I never knew that.

It never used to be this complicated I’m sure of it…!

It's a bit like the Intel Thread Director, in that it tried to ensure the correct threads go to the correct cores.

In the case of AMD though, they have piggybacked onto Microsoft's existing game mode for this, to ensure that games/threads that benefit from the extra 3D Cache get scheduled to those cores, whereas games/threads that don't benefit from extra cache, get scheduled to the none 3D Cache cores, and are able to use a little extra frequency.

Personally I don't like the idea of any extra software to do this (as there's always the possibility it will make a wrong decision), but at least AMD's solution looks to be tweakable (i.e. you can manually chose between prefer cache/prefer frequency, as well as leaving it as "auto").

In an ideal world, all cores would be equal (same cache, IPC, features) rather than the current trend for Heterogeneous architectures, but power, die space and cost are all factors in play now more than ever
 
Game bar is used as part of Windows' Game mode application detection and manual overriding via Win+G


Interesting, there's a checkbox to flag a program as "a game" so whatever the known game list you can update it with whatever you have.
 
It's a bit like the Intel Thread Director, in that it tried to ensure the correct threads go to the correct cores.

In the case of AMD though, they have piggybacked onto Microsoft's existing game mode for this, to ensure that games/threads that benefit from the extra 3D Cache get scheduled to those cores, whereas games/threads that don't benefit from extra cache, get scheduled to the none 3D Cache cores, and are able to use a little extra frequency.

Personally I don't like the idea of any extra software to do this (as there's always the possibility it will make a wrong decision), but at least AMD's solution looks to be tweakable (i.e. you can manually chose between prefer cache/prefer frequency, as well as leaving it as "auto").

In an ideal world, all cores would be equal (same cache, IPC, features) rather than the current trend for Heterogeneous architectures, but power, die space and cost are all factors in play now more than ever

It’s odd, having to rely on another piece of software and not even AMD’s own. I deffo think I will wait for the 7800. For purely playing games it should be ‘the best’ and none of this stuff to worry about.
 
So had a play around with the TPU power and benchmark numbers:
jB4GeFV.png

Well, you know how the media like to use terms like decimated, slaughtered and so on?

Well ignore Zen4 3D's gaming prowess, in application loads the perf/watt loss is staggering.

For servers Intel would be loosing even more marketshare if corporate buyers weren't so conservative, but they still have over 3/4 of the market:
63rev9c.png
 
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