AMD has gone official with its Zen 4 3D V-Cache lineup which includes the Ryzen 9 7950X3D, Ryzen 9 7900X3D & Ryzen 7 7800X3D.
AMD Ryzen 7000 3D V-Cache Official: Ryzen 9 7950X3D 16-Core & 144 MB, Ryzen 9 7900X3D 12-Core & 140 MB, Ryzen 7 7800X3D 8-Core & 104 MB, Set For February Launch
The AMD Ryzen 7000 3D V-Cache CPUs are the 2nd generation consumer V-Cache parts featuring stacked cache. While the Zen 3 lineup featured just one 3D V-Cache SKU, the Zen 4 lineup is getting three SKUs at vastly different prices.
AMD Ryzen 9 7950X3D - 16 Cores With 144 MB Cache
Starting at the top, we have the AMD Ryzen 9 7950X3D which will be the flagship and the first 16-core CPU to feature 3D V-Cache technology. The chip will incorporate a total of 32 threads, a total of 144 MB cache (64 MB CCD, 64 MB V-Cache + 16 MB L2), and a TDP of 120W. As for the clocks, the chip is rated at a base clock of 4.2 GHz which is 300 MHz slower than the standard 7950X but boost clocks are rated at the same 5.7 GHz. This should give us a hint at why the TDP is 50W lower versus the Non-3D part.
The way AMD is arranging the 3D V-Cache structuring on the Ryzen 9 X3D parts is by putting the SRAM cache on a single CCD instead of both CCDs. This way, AMD can maximize the performance in gaming through a single CCD while retaining the secondary die to benefit from the higher clock speeds (1T). This means that there should be a balance of single-threaded gaming performance & multi-threaded applications without sacrificing overall clock speeds like the previous gen. This is first and foremost a gaming chip so the cache die is the more important aspect to optimize. It'll be rather interesting to see how things pan out in the final retail units and just how far AMD enables tuning on the new parts.
AMD Ryzen 9 7900X3D - 12 Cores With 140 MB Cache
The second chip is the AMD Ryzen 9 7900X3D which will feature 12 cores and 24 threads. This is also a 2 CCD configuration with one CCD configured with the V-Cache and the second without it. The chip features a total of 140 MB cache (64 MB CCD, 64 MB V-Cache + 12 MB L2). The clocks are rated at a 4.4 GHz base which is 200 MHz slower than the Non-3D SKU & the boost clock remains the same at 5.6 GHz. The CPU is also rated at a TDP of 120W.
AMD Ryzen 7 7800X3D - Replacing The 5800X3D As The New Gaming Champ!
Lastly, we have the successor to the Ryzen 7 5800X3D, and the Ryzen 7 7800X3D. This CPU is going to be the ideal choice for gamers with 8 cores, 16 threads, and the same 104 MB of cache (32 MB CCD, 64 MB V-Cache + 8 MB L2). The CPU comes with a base clock of around 4 GHz which could end up at least 500 MHz slower than the Ryzen 7 7700X and a boost clock of 5.0 GHz which is 400 MHz slower than the Ryzen 7 7700X.
AMD Ryzen 7000 Raphael Desktop CPU Specs:
| CPU Name | Architecture | Process Node | Cores / Threads | Base Clock | Boost Clock (SC Max) | Cache | TDP | Prices (Updated 7/18/23) |
|---|---|---|---|---|---|---|---|---|
| AMD Ryzen 9 7950X3D | Zen 4 3D V-Cache | 5nm | 16/32 | 4.2 GHz | 5.7 GHz | 144 MB (64+64+16) | 120W | $627 US |
| AMD Ryzen 9 7950X | Zen 4 | 5nm | 16/32 | 4.5 GHz | 5.7 GHz | 80 MB (64+16) | 170W | $548 US |
| AMD Ryzen 9 7900X3D | Zen 4 3D V-Cache | 5nm | 12/24 | 4.4 GHz | 5.6 GHz | 144 MB (64+64+12) | 120W | $459 US |
| AMD Ryzen 9 7900X | Zen 4 | 5nm | 12/24 | 4.7 GHz | 5.6 GHz | 76 MB (64+12) | 170W | $413 US |
| AMD Ryzen 9 7900 | Zen 4 | 5nm | 12/24 | 3.6 GHz | 5.4 GHz | 76 MB (64+12) | 65W | $399 US |
| AMD Ryzen 7 7800X3D | Zen 4 3D V-Cache | 5nm | 8/16 | 4.0 GHz | 5.0 GHz | 104 MB (32+64+8) | 120W | $419 US |
| AMD Ryzen 7 7700X | Zen 4 | 5nm | 8/16 | 4.5 GHz | 5.4 GHz | 40 MB (32+8) | 105W | $319 US |
| AMD Ryzen 7 7700 | Zen 4 | 5nm | 8/16 | 3.6 GHz | 5.3 GHz | 40 MB (32+8) | 65W | $289 US |
| AMD Ryzen 5 7600X | Zen 4 | 5nm | 6/12 | 4.7 GHz | 5.3 GHz | 38 MB (32+6) | 105W | $199 US |
| AMD Ryzen 5 7600 | Zen 4 | 5nm | 6/12 | 3.8 GHz | 5.1 GHz | 38 MB (32+6) | 65W | $209 US |
| AMD Ryzen 5 7500F | Zen 4 | 5nm | 6/12 | 3.7 GHz | 5.0 GHz | 38 MB (32+6) | 65W | $179 US |
Here, we see that our prediction of how AMD is managing the cache die and the clocks are playing here. The 120W TDP is retained despite the Ryzen 7 7800X3D running at lower clocks than AMD's Ryzen 7 7700X which has a TDP of 105W. This means that the cache requires that extra TDP limit & AMD is optimizing those base/boost clocks heavily on the Ryzen 9 parts to meet the 120W target. It will be interesting to see those clock variations across the dual Ryzen 9 CCD SKUs in further tests.
As for the performance, AMD is touting a huge 30% performance improvement for the Ryzen 7 7800X3D over the Ryzen 7 5800X3D. The titles used are cherry-picked and AMD isn't sharing any details such as the test settings or configurations that were used here but if these results are legit, then we can see the Ryzen 7 7800X3D become just as popular as the Ryzen 7 5800X3D in the retail segment. The AMD Ryzen 7000 3D V-Cache CPUs are going to hit retail shelves next month in 2023 February.
