![]() ![]() While Ryzen 7000 can drive a 2 DPC/4 DIMM setup, you’re going to lose 31% of your memory bandwidth if you go that route. So as was the case with Intel’s Alder Lake platform, system builders are going to need to put a lot more thought into how they go about adding memory, and how they’re going to handle future memory expansion, if at all. But, like all other DDR5 products we’ve seen thus far, 2 DPC comes with a significant penalty in that case the maximum JEDEC speed is reduced to just DDR5-3600. For AMD’s Ryzen 7000 desktop processors, which are based on the Zen 4 Raphael design, these chips offer support for official (JEDEC) speeds at up to DDR5-5200 for a 1 DIMM Per Channel (DPC) configuration. So why implement DDR4 support if it’s only going to be necessary for a short period of time?Īs for memory speeds and capacities supported, while AM5 enforces the use of DDR5, ultimately it’s the individual memory controllers that determine the rest. Ultimately, with AMD starting the DDR5 transition roughly a year after Intel, the company’s expectations are that DDR5 prices are going to continue falling fast enough that they’re going to reach parity with DDR4 before too long. There will be no such thing as a DDR4 AM5 motherboard, and AMD needs not bake DDR4 support into any of the Ryzen memory controllers. But at the same time, it simplifies things over the long run of the platform, especially since AMD is planning on supporting it through 2025. ![]() In the short term, this is going to drive up the total cost of an AM5 system relative to a theoretical AM5 system with DDR4 memory DDR5 simply costs more right now. Like other engineering decisions, this marks a trade-off being made by AMD. This is a true platform limitation, and there is no going back. Unlike rival Intel, who opted to support both DDR4 and DDR5 memory with their Alder Lake (12 th Gen Core) CPUs, AMD is only supporting DDR5 on the AM5 platform. In fact, socket AM5 only brings DDR5 support. Like AM4, which was introduced alongside AMD’s shift over from DDR3 to DDR4, socket AM5 is being rolled out to bring support for DDR5 for the platform. The final major feature being introduced with the AM5 platform is DDR5 memory support. DDR5 & AMD EXPO Memory: Memory Overclocking, AMD's Way ![]()
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