The Intel Core Ultra 200S (codenamed Arrow Lake) chip spec sheets note that their maximum JEDEC DRAM speed is DDR5-6400, allowing users to use faster memory speeds without overclocking. However, hardware leaker @harukaze5710 shared some documentation on X that showed that the chips supported the faster standard when using more expensive CUDIMM. Standard UDIMM sticks would be limited to DDR5-5600 unless you use XMP to overclock them.
CUDIMMs have onboard clock drivers that improve memory stability at higher frequencies. This allows systems to take advantage of high-speed RAM, allowing users to enjoy better performance without worrying about whether their processor can support the lightning-fast speeds.
