When AMD was preparing the Ryzen 9 79x0X3D, it also experimented with a variant that would carry V-cache on both processor chiplets (CCD). However, she came across two facts that made such an option disadvantageous. The first was that the impact on performance (compared to V-cache on only one CCD) was completely negligible, and the use of two made the processor more expensive than it brought any major advantage. The second meant that the processor cores would have to run at a significantly lower clock frequency in order to dissipate heat well from both processor chiplets covered by V-cache.
| Ryzen | cores train. |
rate / boost | L3 | TDP | cooler Wraith |
cena | |
|---|---|---|---|---|---|---|---|
| R9 | 7950X3D | 16/32 | 4,2 / 5,7 GHz | 128MB | 120W | – | $699 |
| 7950X | 16/32 | 4,5 / 5,7 GHz | 64MB | 170W | – | $699 | |
| 5950X | 16/32 | 3,4 / 4,9 GHz | 64MB | 105W | – | $799 | |
| 7900X3D | 12/24 | 4,4 / 5,6 GHz | 128MB | 120W | – | $599 | |
| 7900X | 12/24 | 4,7 / 5,6 GHz | 64MB | 170W | – | $549 | |
| 5900X | 12/24 | 3,7 / 4,8 GHz | 64MB | 105W | – | $549 | |
| 7900 | 12/24 | 3,7 / 5,4 GHz | 64MB | 65W | Prism RGB | $429 | |
| 5900 | 12/24 | 3,0 / 4,7 GHz | 64MB | 65W | – | OEM | |
| R7 | 7800X3D | 8 / 16 | 4,2 / 5,0 GHz | 96MB | 120W | – | $449 |
| 5800X3D | 8 / 16 | 3,4 / 4,5 GHz | 96MB | 105W | – | $449 | |
| 5800X | 8 / 16 | 3,8 / 4,7 GHz | 32MB | 105W | – | $449 | |
| 5800 | 8 / 16 | 3,4 / 4,6 GHz | 32MB | 65W | – | OEM | |
| 7700X | 8 / 16 | 4,5 / 5,4 GHz | 32MB | 105W | – | $399 | |
| 5700X | 8 / 16 | 3,4 / 4,6 GHz | 32MB | 65W | – | $299 | |
| 7700 | 8 / 16 | 3,8 / 5,3 GHz | 32MB | 65W | Prism RGB | $329 | |
| 5700G | 8 / 16 | 3,8 / 4,6 GHz | 16MB |
65W | Stealth | $359 | |
| 5700GE | 8 / 16 | 3,2 / 4,6 GHz | 16MB | 35W | – | OEM | |
| R5 | 7600X | 6 / 12 | 4,7 / 5,3 GHz | 32MB | 105W | – | $299 |
| 5600X | 6 / 12 | 3,7 / 4,6 GHz | 32MB | 65W | Stealth | $299 | |
| 7600 | 6 / 12 | 3,8 / 5,1 GHz | 32MB | 65W | Stealth | $229 | |
| 5600G | 6 / 12 | 3,9 / 4,4 GHz | 16MB |
65W | Stealth | $259 | |
| 5600 | 6 / 12 | 3,5 / 4,4 GHz | 32MB | 65W | Stealth | $199 | |
| 5600GE | 6 / 12 | 3,4 / 4,4 GHz | 16MB | 35W | – | OEM | |
| 5500 | 6 / 12 | 3,6 / 4,2 GHz | 16MB | 65W | Stealth | $159 | |
| R3 | 5300G | 4 / 8 | 4,0 / 4,2 GHz | 8MB | 65W | – | OEM |
| 5300GE | 4 / 8 | 3,6 / 4,2 GHz | 8MB | 35W | – | OEM | |
Therefore, the decision was made to install V-cache on only one chiplet (CCD) and leave the other in the classic configuration supporting high clock frequencies. This would increase the game performance, at the same time the single-core performance would not be degraded and the overall application performance would be higher than the variant with a pair of CCDs. In order for such a maximally balanced game-application solution that minimizes compromise to work, it was necessary to somehow ensure that games primarily use a chiplet with V-cache (X3D CCD) and applications primarily a high-clocked chiplet (5.7GHz CCD).
As the screenshots posted by leaker HXL show, AMD solves this with algorithm sets in the BIOS. These have (at least in beta-version) very extensive setting options, under which conditions to prefer X3D CCD and when 5.7GHz CCD.
Reviews of the Ryzen 9 7950X3D and Ryzen 9 7900X3D processors are expected on Monday, February 27, and sales will begin on Tuesday, February 28. The Ryzen 7 7800X3D will be available in April.
