Solfaur:

Looks interesting (- the 7800X3D nerf) for someone like me who's still sitting on a 3900X. However, I'll wait for plenty of reviews and user feedback this time around before biting the bullet on a platform upgrade.

Same here. I'm curiously waiting on reviews (I hope @Hilbert Hagedoorn will get a review sample and the NDA ends close to release), especially to see if the 800 nerf is so big that one "has to" or better steps up to the 900 CPU. One thing I'm really curious, how compatability is, how RAM work, what settings you can tweak... At this point, I believe anything would be a good upgrade to my 2014 Intel 5930K :P

I was gonna get a 7800x3d, as i want a single ccx cpu... but when they nerfed it so hard... dunno... what c*nts...

finally the 5800X3D will get a real price cut :V

user1:

your assuming that the vcache cores will be slower, when there is no way to know yet, the frequency penalty on the 5800x3d had a very small effect on performance, very few applications are both lightly threaded and arent latency/cache sensitive, there is no reason to believe that these chips will be any different, nor any reason to believe that the max frequency will be capped at 5ghz on vcache ccds

of course they will be slower, you can see it on 7800X3D which tops at 5GHz, so you will have faster ccd with 32MB and slower ccd with 96MB cache, and for best performance, you will need to set affinity manually per app

Interested, subject to reviews. Wasn't going to upgrade this cycle, but with Meteor Lake getting postponed, I might as well go with an X3D, assuming performance justifies it.

When are these hitting the shelves, this month??? if so it looks like my trip back to the UK will no longer involve buying a new GPU but rather a new CPU/MOBO/RAM if the 7900X3D provides a big uplift over the 5800X3D.

Dragam1337:

I was gonna get a 7800x3d, as i want a single ccx cpu... but when they nerfed it so hard... dunno... what c*nts...

Yeah, same boat. Although I only care about game performance, so as long as it delivers in games, I'm good. Gonna upgrade from 5900X.

Cidious:

Yeah as said above. They want to push us into a crappier 7900X3D. 7900X3D will suffer the same latency penalties as the other dual CCD AMD parts do and have done in the past with gaming and some other scenarios. They prefer to sell us 1 broken 3 core CCD that can boost 5.6GHz and one broken 3 core CCD that's always the retard just like it was with 3900X, 5900X and 7900X.. And checking the slide against 5800X3D.. uphill battle still for the 7800X3D if they don't give it more clocks. on top of that seeing the price list. 7800X3D is going to cost $499 ($50 more than last gen). Pretty sure of it. Ah well. AMD doing AMD things. I will just wait it out with my 5800X3D until discounts come for AM4 X3D

The max clock speeds probably won't matter much. Those 3 CPUs have a max TDP of 120W. And probably have the same EDC, PPT, TDC. The 7950X3D and 7900X3D might be able to reach those max clocks in light threaded loads. But with higher threaded loads, they will hit a power limit much sooner than the 7800X3D and will end up clocking lower. The other issue is that the cache will reduce thermal dissipation a lot. So these 7950X3D and 7900X3D will hit thermal limits very soon. I don't expect that the 7950X3D and 7900X3D will be able to maintain such high clocks. PBO-30 might help a bit, but it can't do miracles. In this case, I don't think it's so much a matter of having nerfed the 7800X3D, but more of having the wrong expectation of that the 7950X3D and 7900X3D will be able to sustain those clocks. I have a 5800X3D, at default, running something heavily threaded, it soon reaches a thermal limit and starts to throttle. And this is with only 4.45Ghz on all cores and a TDP of 105W. Now imagine the 7950X3D and 7900X3D, with that thick HIS, and all those cores pumping heat and with less power available per core. EDIT: Another thing to consider. All these CPUs have only 64MB of extra cache. Even the 7950X3D and 7900X3D, despite having more cores. AMD claims 104MB L2+L3 for the 7800X3D. 8MB L2 + 32MB of L3 + 64 MB of L3V3D 7900X3D: 140MB L2+L3 12MB L2 + 64MB of L3 + 64MB of L3V3D 7950X3D: 144MB L2+L3 16MB L2 + 64MB L3 + 64MB of L3V3D So for the 7950X3D and 7900X3D, only one of the CCDs will have 3DV cache on top of it? I wonder if a game hits the CCD without 3DVcache, it will run run worse than if it hits the CCD with 3DV cache. And the CCD without 3DVcache, how will AMD fill the gap to the HIS. Will it use just some TIM. Or will it use some broken silicon part. How much does it affect thermal performance, compared to the CCD with 3DVcache? Or maybe, the 7950X3D and 7900X3D only have 32MB per CCD of 3DV cache. Considering this distribution of 3DVcache on the 7950X3D and 7900X3D, it might be that these are the ones that are kind of gimped.

Horus-Anhur:

I have a 5800X3D, at default, running something heavily threaded, it soon reaches a thermal limit and starts to throttle. And this is with only 4.45Ghz on all cores and a TDP of 105W. .

Do you have it UVed, i have run -50 and -30 but settled on -30 as overall performance was best. The max temp ive seen was 70c but thats very rare was was when it was warmer. My PC gaming room is around 16C so i doubt it would hit 70c now on something like CB.

pegasus1:

Do you have it UVed, i have run -50 and -30 but settled on -30 as overall performance was best. The max temp ive seen was 70c but thats very rare was was when it was warmer. My PC gaming room is around 16C so i doubt it would hit 70c now on something like CB.

PBO only goes at-30. Any value bellow that is not accepted. And yes, I have it at -30. With this, the CPU won't throttle, even when running something as heavy as a y-cruncher.

Horus-Anhur:

PBO only goes at-30. Any value bellow that is not accepted. And yes, I have it at -30. With this, the CPU won't throttle, even when running something as heavy as a y-cruncher.

Ive set mine to -50 and it ran but the CB scored decreased slightly. For me the 5800X3D is up there with the best CPUs ive owned including a Mobile Barton core and my 2700k that ran all day at 5ghz. Hoping the 7*** series X3D are as good.

The 7800x3d is ideal for a gamer like me but it's going to be expensive, so I'm more interested in the plain 7800, so I can have more money for a better GPU.

pegasus1:

Ive set mine to -50 and it ran but the CB scored decreased slightly. For me the 5800X3D is up there with the best CPUs ive owned including a Mobile Barton core and my 2700k that ran all day at 5ghz. Hoping the 7*** series X3D are as good.

That's probably because the CPU refused the value and set it to default.

My guess is that all 7000x3d series the 3Dcache CCD will max boost to 5.0 ghz so they are all nerfed in terms of clock speed hence the lower TDP. But if the cache has lower latency and it is implemented better the gains will be enough to justify the clock drop. All Core it could maybe drop to 4.8Ghz i guess which for anything outside of gaming that does not use this mega cache will be a significant nerf. I am curious about the thermals. Not going to upgrade as my 7600x provides more than enough for my gaming needs, it is a beast of an efficient gaming CPU.

Yosif Videlov:

My guess is that all 7000x3d series the 3Dcache CCD will max boost to 5.0 ghz so they are all nerfed in terms of clock speed hence the lower TDP. But if the cache has lower latency and it is implemented better the gains will be enough to justify the clock drop. All Core it could maybe drop to 4.8Ghz i guess which for anything outside of gaming that does not use this mega cache will be a significant nerf. I am curious about the thermals. Not going to upgrade as my 7600x provides more than enough for my gaming needs, it is a beast of an efficient gaming CPU.

I think the same. The high boost clocks in the 7900X3D and 7950X3D are probably at the expense of the non 3DCache CCD. Since the 7800X3D don't have one, max boost appears to be nerfed.

haste:

Yes, that is most likely the case. One CCD will have max boost limited to 5.0GHz while the other one without 3D cache will have the advertised 5.7GHz boost. It would be interesting to know if the CCD without 3D cache will be able to access 3D cache data from the other CCD if the requested data are already fetched there. That way both CCDs would benefit from it.

Yes, cores in one CCD can fetch data from a core in another CCD. But the cost is as high as going to memory, at 75-80ns. https://images.anandtech.com/doci/17585/AMD%20Ryzen%209%207950X%20Core%20to%20Core%20Latency%20Final.jpg

Actually WHEN is the embargo going to lifted? I just need to plan out my budget for this build.

Horus-Anhur:

That's probably because the CPU refused the value and set it to default.

Didnt look that way bud, voltages dropped below -30 levels but were constant throughout the tests.

FranciscoCL:

I think the same. The high boost clocks in the 7900X3D and 7950X3D are probably at the expense of the non 3DCache CCD. Since the 7800X3D don't have one, max boost appears to be nerfed.

Frame Rates are all that will count, and should be the reason these sell or dont, if they are fast then numbers on a page matter little.

pegasus1:

Didnt look that way bud, voltages dropped below -30 levels but were constant throughout the tests.

All guides I saw stated that PBO -30 is the limit. never saw anyone trying to push lower than that.