RAM Upgrade
MSI Thin 15 B12UCX Max RAM & Upgrade
The short answer
The maximum supported RAM for the Thin 15 B12UCX is 64 GB. Yes — the Thin 15 B12UCX has 2 user-accessible DDR4-3200 slots.
Last verified 10/6/2026 · Sources: MSI, LaptopCompat (derived from processor and ports sources)
Specifications
- Memory type
- DDR4-3200
- Form factor
- SO-DIMM
- Total slots
- 2
- User-accessible slots
- 2
- Soldered memory
- 0 GB
- Maximum supported
- 64 GB
What to buy
Buy DDR4-3200 SO-DIMM modules; the laptop has 2 user-accessible slots.
Details
This maximum reflects 2 user-accessible DDR4-3200 slots, per manufacturer documentation.
Conditions
- Modules must match this laptop's DDR4-3200 form factor and generation.
Worth knowing before you buy
- A faster-rated module than this platform supports will still work, but will run at the laptop's supported speed rather than its advertised maximum.
- This is the manufacturer-documented maximum — some platforms have been community-tested beyond the officially configured maximum, but that isn't treated as verified here.
Also upgrading storage?
Frequently asked questions
Can you upgrade the RAM in the MSI Thin 15 B12UCX?
The maximum supported RAM for the Thin 15 B12UCX is 64 GB. Yes — the Thin 15 B12UCX has 2 user-accessible DDR4-3200 slots.
How much RAM does the MSI Thin 15 B12UCX support?
This maximum reflects 2 user-accessible DDR4-3200 slots, per manufacturer documentation.
Sources
- MSI — Thin 15 B12UCX-1428TH Specification Sheet — verified 8/20/2026
- LaptopCompat (derived from processor and ports sources) — Estimated external displays for thin-15-b12ucx — verified 10/6/2026
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