this post was submitted on 26 Dec 2024
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AMD Ryzen 9 9950X3D CPU-Z specs leak: max 5.65 GHz clock, 170W TDP and single 3D V-Cache CCD (videocardz.com)
submitted 3 weeks ago by [email protected] to c/hardware
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[–] [email protected] 2 points 3 weeks ago (1 children)

Will have to check this out. From my understanding 3D cache on a single CCD in a X2 CCD CPU setup does not work well.

[–] Cort 2 points 3 weeks ago (1 children)

I seem to remember it being mentioned during a factory tour or interview with one of the head honchos. I don't think they got into specifics, but my bet was that thermals were holding it back since the cache was on top of the ccd. Now that they're below, I bet we see one next generation after they reduce the cost of putting it below the ccd.

[–] [email protected] 1 points 3 weeks ago (1 children)

There’s another thing to look out for: cost

Dual 3D v cache won’t help gaming since most games stay on one CCD. Having the “gaming” ccd and the “everything else” CCD is really the best of both worlds as long as windows can get their scheduler shit together. If you could run just the game on one CCD and everything else on the other then that’d be perfect for multi taskers like me.

[–] [email protected] 1 points 3 weeks ago (1 children)

Dual 3D v cache won’t help gaming since most games stay on one CCD. Having the “gaming” ccd and the “everything else” CCD is really the best of both worlds as long as windows can get their scheduler shit together. If you could run just the game on one CCD and everything else on the other then that’d be perfect for multi taskers like me.

This does seem like optimal solution. But from what I read about a year ago, in practice it does not work this way (on Windows at least, no idea about Linux). Things may have changed since then.

[–] [email protected] 2 points 3 weeks ago

Linux I think has made some improvements, but windows is largely still too dumb to figure it out. You can manually try to fix it by setting the affinity of your game to only run on one CCD, but if as bad as the hybrid CPU situation then it will just ignore it.

But this is a solveable. Linux mostly figured it out the other day if I remember right, and it’s just software. Plus there’s zero benefit to having dual 3D vcache for games since they can’t properly take advantage of 2CCDs without a big performance hit.