Rumors are still circulating about the RDNA 4 architecture and the latest news is that AMD will not be replacing its RDNA 4 GPUs with high-end RDNA 3 GPUs.
It seems that AMD is planning to focus on the low- and mid-range graphics card market with this architecture, but the company has not confirmed this. Every new rumor about the next generation of GPUs seems to suggest that the RDNA 4 architecture won't make it to the high-end graphics market.
There is another rumor coming from Kepler account on the X platform, The company reinforces the idea that the company will not use GDDR7 memory in the RDNA 4 architecture, but rather will use the slower GDDR6 memory, with speeds of up to 18 Gb/s, which is currently found in some AMD GPUs.
Given the rumors, it makes sense to choose the cheaper GDDR6 memory over the more expensive GDDR7, as the $20 premium could influence the purchasing decision if AMD wants to target gamers using mid- to mid-range GPUs.
Buyers may not care much about what type of memory the GPU uses and just want good performance at a reasonable price. AMD could also make progress on unlimited cache in the GPU and thus increase bandwidth. So, in theory, next-gen graphics cards can do just fine without ultra-fast GDDR7 memory.