[Update - 12/26/2025] - Taiwanese outlet, CNA, has received a statement from ASUS regarding the DRAM rumor and stated that it currently has no plans to invest in a memory wafer fab.
https://wccftech.com/asus-enter-dram-market-next-year-to-tackle-memory-shortages-rumor/



I know this is said in hindsight, but the way the first paragraph is written sets off alarm bells of weird reporting, and I imagine probably was what triggered you to look into it further.
While I get that Asus naturally would want to be competitive, why would they (from an economic standpoint) care about ‘easing the rising costs’ of their products. They would have actual motives like trying to be independent of these major memory manufacturers.
2026 is in less than 5 days. If this instead said “by the end of 2026” or longer I’d have a better time believing that claim.