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AMD To Release Ryzen 7000 Desktop Processors Late 2022, laptop CPUs in 2023
Raphael-based desktop CPUs from AMD will be available before the end of the year. Two new mobile Ryzen 7000 CPUs will be offered beginning in 2023: Dragon Range and Phoenix. All of them are Zen 4 CPUs.
The Ryzen 7000 desktop CPUs (Raphael) are set to launch in the fourth quarter of this year with TDPs starting at 65W; however, AMD has not set a release date. In 2023, AMD will also release two Ryzen 7000 CPUs for laptops. These processors are from the Dragon Range and Phoenix lines. The Dragon Range CPUs are designed for "extreme gaming laptops," whilst the Phoenix CPUs are designed for thin and light laptops. There are no release dates for these new items. The TSMC's 5nm technology ZEN4 based CPUs come along the introduction of socket AM5. DDR5 and PCI Express 5.0.
AMD has already teased a small glimpse of Ryzen 7000 (Raphael), indicating that the processors will be available before the end of the year to replace the Ryzen 5000 (Vermeer) stack, we may see a late September debut. Raphael, in a nutshell, introduces Zen 4 to the consumer market by leveraging TSMC's 5nm production node and the new AM5 platform. Unfortunately, the AM5 platform may be too expensive for customers, as many sources reveal that Raphael will only support DDR5 memory, which is already available at a significant price.
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DDR5 is faster in terms of bandwidth, latency is about the same or slightly worse isn't it ?
Random accesses will be no better off on DDR5, this is what the cache helps massively with. When you're processing large chunks of data, the memory is prefetched ahead of the CPU using it, so size of cache doesn't really help there. Bandwidth helps in those situations.
The issue with missing the CPU's cache is not so much to do with bandwidth, but to do latency.
If a fetch hits the L3 cache, it has to deal with a latency of around 10-15ns. But if it hits the memory, it will have a latency of 60-80ns, depending on the memory.
DDR5 cycle rates are similar to DDR4. Slightly higher, but not much. So DDR5 won't help when there is a cache miss.
Sorry for not being 100% clear.
The statement was that all CPUes should have 3D cache from now on.
There are Workloads that benefit from DDR5 even though the latency is higher (Render, compression and a few games), so that performance boost might eat into the cache boost benefit.
The price difference between 5800x and 5800 3D is 120 € where I live.
There are workloads that do not benefit from 3D cache on the 5800x, this will probably not change much for the 6000-7000 series, so in some cases the money is better spend on 2-4 cores extra, instead of paying the same money for 3D cache.
It may also not be possible to use 3D cache on CPUes with 105W TDP or higher, unless they change from 2 to 4 chiplets on normal desktop, to spread the heat out.