AMD's AM5 platform will debut this year alongside Zen 7000-based Ryzen 4 series processors. There aren't many details about it, and there have been some leaks that AMD might drop out. memory in DDR4 format to focus squarely on DDR5, without a generation or two transition for users.
With AM5, the socket is designed to be a fresh start for AMD, and a new platform to build on to support future Ryzen processors and products. Therefore, it seems that AMD does not intend to support DDR4 memory in AM5.
AMD wants to get rid of DDR4
According to Tom's Hardware, AMD's planned X670 and B650 motherboards will use a chipset-based design. The B650 will use a single chipset while the X670 will have two chipsets. This approach increases the scalability of AMD's high-end chipset and simplifies manufacturing by using a single chipset design for two motherboard lines.
AMD CPU socket AM5 will support PCIe 5.0 and DDR5 memory from the start to have a solid foundation for future Ryzen series processors. Like AM4, AM5 will be a platform that will receive strong long-term support from AMD. All this would make AMD does not want to support memory in DDR4 format in AM5, because it would mean having to support it on the rest of the platform plates for years.
AMD does not plan to abandon its socket AM5 and backward/forward compatibility after two product generations. On the contrary, Intel is comfortable bringing a platform every two years, so it does not bother them that in a year or two they support a support that already has a successor, because they can quickly abandon it permanently.
Part of this decision is the advantages that DDR5 offers over DDR4 on a technical level. It can achieve higher frequencies, consumes less power, can transfer more data with each clock cycle, and offers much more bandwidth than DDR4. But DDR5 memory has a drawback, compounded by the current shortage of components, and that is that it is hard to find and expensive as it is cutting-edge technology for consumers, but as time goes on, it will become more accessible. It is clear that both Intel and AMD intend to drop support for DDR4 on their platforms, and if these rumors are confirmed, AMD would be the first to do so when AM5 comes out and is only compatible with DDR5.
Source: Overclok3d
