What’s 3D V-cache?
AMD’s 3D V-cache is a expertise that enables AMD to position further cache straight onto the CPU die. You possibly can consider this as an additional little bit of ultra-fast reminiscence that the CPU can entry sooner than the system reminiscence. In consequence, computational processes that profit from fast reminiscence entry, equivalent to integer math, are vastly expedited.
| Mannequin | Ryzen 9 7900X3D | Ryzen 9 7900x | Ryzen 7 7800X3D | Ryzen 7 7700x |
| Era | Zen 4 | Zen 4 | Zen 4 | Zen 4 |
| Cores / Threads | 12/24 | 12/24 | 8/16 | 8/16 |
| Base clock / increase clock | 4.4GHz / 5.6GHz | 4.7Ghz /5.6Ghz | 4.4GHz / 5GHz | 4.5Ghz / 5.4Ghz |
| Cache L3 | 128MB | 76MB | 96MB | 32MB |
| TDP | 128W | 170W | 120W | 105w |
Professionals and cons of AMD’s 3D V-Cache expertise and what it means for future CPU designs?
These CPUs will not be with out their caveats, although. One catch is that because of the presence of V-Cache, the CPU cores will run at a decrease velocity than the non-cached counterparts by 3-400mhz (this isn’t mirrored within the official scores for the 7900x3D and 7950x3D as non-cached cores are current). So, in cases the place the cache just isn’t netting advantages, a efficiency loss could be noticed.
One other factor to be conscious of with the design of those CPUs is that the 7900x3D and 7950x3D choices would not have V-cache straight hooked up to all cores. As a substitute, the cache is positioned over a single CCD of 8 cores; past that, there’s a latency penalty in closely multithreaded duties the place one CCD has to speak to the opposite.
Cinebench AMD Ryzen 9 7900x3D vs 7900x vs AMD Ryzen 7 7800x3D vs 7700x Benchmarks
As demonstrated by Cinebench, when coping with advanced rendering calculations, the cache doesn’t make up for the dearth of clock velocity because the system reminiscence must be accessed for many of the work, so the decrease clock speeds on the 3D counterparts are readily observable within the scores.
Metro Exodus Benchmarks AMD Ryzen 9 7900x3D vs 7900x vs AMD Ryzen 7 7800x3D vs 7700x
Nevertheless, for many who use their techniques primarily for gaming or easy repetitive calculations, you will note the profit proven on this Metro Exodus benchmark. There’s a penalty to the 12-core fashions as the sport is best optimized for 8 cores. That is additionally the case in lots of titles, so selecting a mannequin with v-cache above the 7800x3d is a tradeoff to having extra cores.
The significance of contemplating your particular utilization wants when selecting between V-Cache and non-V-Cache CPUs
AMD is within the early phases of this expertise, so there are numerous give-and-take eventualities. For individuals who unique sport on their gaming PCs, the 7800x3D is the most effective CPU out there available on the market. For different blended eventualities, equivalent to gaming and streaming or workstation PC use-cases, it’s going to rely extra on what you need to see out of your PC.
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