https://wccftech.com/samsung-begins-sampling-24-gbps-gddr6-memory-chips-for-next-gen-gpus/

Samsung has started sampling its fastest GDDR6 memory to date that operates at 24 Gbps & is designed for next-gen GPUs.

Currently, Samsung is mass producing its GDDR6 memory chips with up to 18 Gbps speeds but that's about to change. The DRAM manufacturer has started sampling faster GDDR6 chips to its partners that will be available with next-gen GPUs next year.