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Reports from May 10–11, 2026 detail a surge of sophisticated counterfeit DDR5 memory modules circulating in Asian secondary markets, particularly in Japan.
Scammers are mounting dummy plastic or fiberglass “chips” on DDR5 SO‑DIMM and desktop PCBs, relabeling modules with Samsung or SK Hynix stickers and listing them as “junk” or “untested” on platforms such as Yahoo Auctions and Mercari to avoid returns.
In some cases modules contain recycled or low‑grade chips under relabeled heatspreaders; in others the packages are hollow and nonfunctional, discovered only after buyers cut into the chips or experience boot failures and reduced capacity.
The wave of counterfeits is linked to a global DDR5 supply squeeze driven by AI demand, higher prices and widespread use of returns flows that can be exploited for bait‑and‑switch fraud.
Desktop modules with full heatspreaders are especially difficult to verify visually, raising the risk that fakes move into broader resale channels, including returns warehouses.
Vendors and some manufacturers have already updated packaging and anti‑tamper measures, but investigators warn buyers to exercise caution when purchasing from secondary markets.







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