ASUS shows CXMT DDR5 memory running up to 8400 MT/s on AM5 motherboards

ASUS has demonstrated Chinese CXMT based DDR5 memory running at speeds of up to 8400 MT/s on one of its AM5 motherboards, showing that domestic DRAM from China is becoming more capable for high speed desktop platforms.

The demonstration used ASUS’s B850M AYW Gaming OC WIFI7 W motherboard, a 2 DIMM AM5 board built for stronger memory tuning. ASUS tested DDR5 kits from Lexar and Kingbank, both using CXMT memory chips. The results show that CXMT based DDR5 modules can now move well beyond the 6000 MT/s range that was previously seen as a common limit.

This comes at a time when memory supply is under pressure globally. Samsung, Micron, and SK hynix are prioritizing high demand products such as HBM and LPDDR5X for AI customers, which has reduced attention on regular consumer DRAM supply. Because of that, Chinese brands such as Kingbank, Lexar and Gloway have started relying more heavily on CXMT chips for DDR5 memory kits.

ASUS follows MSI in improving support for Chinese DDR5 memory

MSI recently showed optimized BIOS support for CXMT based DDR5 modules on its AM5 boards, reaching up to 8200 MT/s. ASUS has now pushed that figure higher with an 8400 MT/s demo. This does not mean every CXMT kit will reach these speeds, but it shows that motherboard BIOS tuning is helping these modules perform better on AMD platforms.

ASUS used three different memory demonstrations. The first used a Lexar kit officially rated at 7200 MT/s, which was pushed to 8000 MT/s. The second Lexar kit, rated at 7600 MT/s, reached 8200 MT/s. The most impressive result came from a Kingbank 48GB kit with 24Gb CXMT memory ICs. That kit is officially rated at 6000 MT/s but was overclocked to 8400 MT/s.

The Kingbank result is especially notable because the kit moved from 6000 MT/s to 8400 MT/s, a large jump for a CXMT based DDR5 module. ASUS showed it running at a 4200 MHz DRAM frequency, which equals 8400 MT/s effective speed. The setup reportedly used CL42 timings at that speed.

These results also help show why motherboard support matters. Fast DDR5 operation depends on the memory chips, the PCB, the CPU memory controller, and the motherboard BIOS. CXMT modules may have improved, but companies such as ASUS and MSI are also doing important work by adding better compatibility and training support.

For China’s domestic PC market, this progress could be important. If CXMT based DDR5 kits can keep improving, local brands may have a stronger alternative to memory based on Samsung, Micron, or SK hynix chips. That could help reduce dependence on overseas DRAM suppliers, especially while global memory prices remain high.

For buyers, the practical point is more cautious. These are overclocking demonstrations, not guaranteed retail results. Still, ASUS showing 8400 MT/s on AM5 is a clear sign that CXMT DDR5 is maturing quickly. What once looked like a lower speed domestic option is now moving into performance territory, and future BIOS updates could make these kits even more useful for Ryzen builders.