How to Read a RAM Label: Samsung, Hynix, Micron Part Numbers Decoded

By The Founder · Reviewed July 7, 2026 · About the author

Samsung: M393A4K40CB2-CVF

M393 = DDR4 RDIMM family (M386 = LRDIMM, M391 = ECC UDIMM, M471 = SODIMM). A4K40 encodes 32GB dual-rank ×4; the suffix letter pair is speed — CTD 2666, CVF 2933, CWE 3200. So M393A4K40CB2-CVF reads: 32GB DDR4-2933 RDIMM.

SK Hynix: HMA84GR7CJR4N-WM

HMA = DDR4 (HMC = DDR5); 84G = 32GB, 8G = 8GB, AA8G = 64GB; R7 = registered (S6 = SODIMM); the tail encodes speed — VK 2666, WM 2933, XN 3200.

Micron: MTA36ASF4G72PZ-2G9E1

MTA36 = 36-chip ECC registered; ASF4G72 = 32GB; the tail is speed — 2G3 2400, 2G6 2666, 2G9 2933, 3G2 3200.

Kingston and third-party

KSM29RD4/64HAR: KSM = server line, 29 = 2933, RD4 = registered dual-rank ×4, 64 = capacity. Crucial CT-codes put capacity first: CT32G4DFD832A = 32GB DDR4 3200.

Just paste it

Every sell page lists the part numbers we match — 16GB, 64GB, the whole catalog on the Payout Index — and the quote form fuzzy-matches anything you paste, dashes or no dashes.