Even if Intel's upcoming hybrid CPUs of the Alder Lake-S type officially support a maximum of DDR5-4800 RAM in dual channel, Intel XMP 3.0 is already available with the help of the in-house RAM optimizer Standards like the DDR5-6400 and higher, which is already in the test flight, are expected in the near future.
DDR4-6400 already in testing
The Twitter user “@ harukaze5719” published a partially illegible excerpt from a screenshot from the AIDA64 suite's storage benchmark, which presented an engineering sample of an Alder Lake in A0 stepping with a total of 10 cores, which is presumably a core i5-12600K acts.
A little later, “@ GoFlying8” published the full screenshot showing the RAM DDR5-6400 alias PC-51200 with 400 MHz real and 6,400 MHz effective memory clock, which works on an OEM mainboard from Dell.
& mdash;夕 惕 若 厉 (@ GoFlying8) September 13, 2021
Still very high memory latencies
A relatively high memory latency of more than 92 ns can also be observed due to the comparatively high CAS latency of 40 clock cycles and the very lazy timing of CL40-40-40-85. Current Intel CPUs are a maximum of half.
DDR5 was officially specified by JEDEC with up to 8,400 MT/s, i.e. up to DDR5-8400, and will be corresponding Frequencies are expected to be able to deploy via Intel XMP 3.0 in the near future. Zen 4 on the AM5 socket and the enterprise solutions AMD Genoa and Intel Sapphire Rapids will also rely on DDR5.
In particular from Samsung, SK Hynix and Micron, their fastest memory chips in the future than 1α-DRAM in the new and more efficient 1-alpha (1α) manufacturing process, corresponding memory ICs are expected that will later enable OC modules with DDR5-9600, DDR5-10200 and more for overclocking and players .