Monday, January 23rd 2023
AMD Product Pages Say Upcoming 7950X3D and 7800X3D "Unlocked for Overclocking"
The product pages of the upcoming AMD Ryzen 9 7950X3D and Ryzen 7 7800X3D "Zen 4" processors went online, which say that the two chips are unlocked for overclocking. This normally implies that the processor has an unlocked base-clock multiplier, which makes it easy to overclock. The previous-generation Ryzen 7 5800X3D processors came with locked base-clock multipliers, making them complicated to overclock. Both the 16-core/32-thread 7950X3D and the 8-core/16-thread 7800X3D come with a TDP rating of 120 W, which for the 7950X3D is significantly lower than the 170 W that the 7950X is rated at. It's also worth noting that the T-junction max (TJmax) value is lower, at just 89°C, compared to 95°C of the 7950X and 7700X.
Slated for a February 2023 market release, the two chips introduce stacked 3D vertical cache technology (3DV cache). The 7800X3D comes with 64 MB of 3DV cache stacked on top of the 32 MB of on-die L3 cache, taking its L3 cache size to 96 MB, and total cache (L2+L3) to 104 MB. On the other hand, the 7950X3D and the 12-core/24-thread 7900X3D only come with the 3DV cache memory on one of the two "Zen 4" CCDs. The first CCD has 96 MB of L3 cache (including the 3DV cache), while the second CCD is a standard "Zen 4" CCD with just 32 MB of on-die L3 cache. For these chips, the L3 cache adds up to 128 MB, and total cache to 140 MB for the 7900X3D, and 144 MB for the 7950X3D.
Update Jan 24th: AMD updated their product pages to remove this field altogether. It looks like we'll have to wait a bit for AMD to finalize its specs.
Source:
HXL (Twitter)
Slated for a February 2023 market release, the two chips introduce stacked 3D vertical cache technology (3DV cache). The 7800X3D comes with 64 MB of 3DV cache stacked on top of the 32 MB of on-die L3 cache, taking its L3 cache size to 96 MB, and total cache (L2+L3) to 104 MB. On the other hand, the 7950X3D and the 12-core/24-thread 7900X3D only come with the 3DV cache memory on one of the two "Zen 4" CCDs. The first CCD has 96 MB of L3 cache (including the 3DV cache), while the second CCD is a standard "Zen 4" CCD with just 32 MB of on-die L3 cache. For these chips, the L3 cache adds up to 128 MB, and total cache to 140 MB for the 7900X3D, and 144 MB for the 7950X3D.
65 Comments on AMD Product Pages Say Upcoming 7950X3D and 7800X3D "Unlocked for Overclocking"
On Zen 3, the main problem they had as far as i recall is they were not able to send enough power or voltage to the cache die or at least they had issue controlling it. It supposed to be resolved with Zen 4. So we will see.
Can't wait to see the results. If the scheduler do it's job correctly (And that is a big IF lol), there is a possibility of big gain with this gen. L3 cache is a victim cache and if the whole CCD with the extra cache is allocated only to a game, it will means there will be less cache pollution from other thread. This could lead to some additional performance gain for the 3d stacked cache (and indeed, only on 2 CCD setups,).
I really think that Zen 4 X3D will be a killer for anyone who don't want to mess with memory Overclocking. (and i am one of those, For me, that is a big pain in the ass to do that and it take way too long. I have game to play and work to be done).
It should be noted that i'm mad in the head and start to worry when temperatures in my computer comes close to 50 degree C, maybe i should just sit outside with my computer, i live in a place where it rarely gets above 5 degree C between October and May. Maybe my worry about global warming comes from the possibility that i need to stop using computers completely, not sure that its really possible to run a computer at 50 C with room temperatur at 50c.
Its a gimmick with a few percent.... if you know what you do.
I'm definitely waiting for reviews. I'm an odd duck as I'm interested in the 7900X3D the most. I want extra cores for productivity reasons, but not the expense of the 7950X. Still if reviews show the 7950X3D is more better choice in performance per dollar, maybe I'll be tempted.
www.amd.com/en/products/apu/amd-ryzen-7-7800x3d
Aren't these the official pages? Something is wrong.
And something else:
Consumer Use
7800X3D: Yes
7950X3D: No
www.amd.com/en/product/12741
Most Ryzen "overclocks" are also usually hurting boost performance and single core / low core speed, and are actually decreasing gaming capability of CPU - so exactly the oposite you'd want from a gaming / low core focused CPU.
I just want to see the 3dcache performance with the 7000 chip. Maybe I will consider jumping on it but that depends. I still have some good years in my rig. If the performance is outstanding then maybe I will pull the trigger on that one.I think the OC is over and the chips have features to utilize as much as possible from the CPU. undervolt is the way to go since all are power or heat constrained or OC memory. The CPU oc is slowly dying I think in a way we used to know it.
The extra cache doesn't come free of limitations and besides gaming it seems to have more of them than benefits.
I seriously hope they don't gimp 7800X3D too much in terms of clockspeed
However I think the listed (higher clockspeed) on 7900X3D and 7950X3D is ONLY for workloads when 3D cache cores is not in use, as they only have 3D cache on 1 CCD.
"Up to" Boost clocks.
If they allow OC tho, why gimp the clockspeeds compared to regular versions?
So at same w consumption at full load you will need better cooling to avoid throttling.
But those 3dv cpu's come with lower TDP of 120w instead of 170w (or baselin w) and lower MHz so it might end up equivalent when it come to cooling requirements.
We will see.The blanket is too small with the 3dv.
You can't have it all.
For gaming you don't really need "all" and as those are pure gaming CPU everything is fine really.
www.amd.com/en/products/apu/amd-ryzen-7-7800x3d
www.amd.com/en/products/apu/amd-ryzen-9-7900x3d
www.amd.com/en/products/apu/amd-ryzen-9-7950x3d
If they come with lower TDP that is even better I would say. Sure we will see.