ASUS Vivobook X405UA RAM upgrade specifications
ASUS Vivobook 14 Series X405UA features DDR4-SDRAM memory specifications with one SO-DIMM slot available for upgrade. The laptop contains on-board memory combined with one expandable SO-DIMM slot, supporting maximum RAM capacity of 24 GB. Memory operates at 2133 MHz frequency. Compatible upgrade modules must match DDR4-SDRAM specifications and SO-DIMM form factor for proper installation in the available slot. Maximum memory configuration achievable through RAM upgrade is 24 GB total capacity.
Memory Upgrade Specifications
| Specification | Value |
|---|---|
| Memory slots | 1x SO-DIMM |
| Form factor | On-board + SO-DIMM |
| Memory type | DDR4-SDRAM |
| Frequency | 2133 MHz |
| Maximum RAM | 24 GB |
| Voltage | 1.2V |
| Number of pins | 260-pin |
| Interface | PC4 |
| PC Speed Rating | PC4-2133 (PC4-17064) |
| Bandwidth | 17.1 GB/s |
| Laptop Release date | 22 July 2017 |
Additional Notes
- The system contains soldered on-board memory paired with a single expandable SO-DIMM slot, meaning maximum capacity is constrained by the largest available module rather than true dual-channel potential.
- DDR4-2133 operates at the JEDEC baseline standard, indicating no performance tuning margin exists; any replacement module must match this frequency exactly to avoid throttling or instability.
- A 24 GB ceiling suggests 16 GB soldered memory with support for a single 8 GB SO-DIMM, making symmetrical dual-channel configuration impossible regardless of aftermarket modules selected.
- SO-DIMM availability in capacities above 8 GB remains limited in the used market, restricting practical upgrade paths to current-generation retailers.
- The single expandable slot provides no redundancy; failure of the SO-DIMM disables only the upgrade capacity, not the core 16 GB on-board allocation.
- DDR4-2133 memory bandwidth (17.1 GB/s per channel) creates a bottleneck when paired with 7th-generation Core processors that prefer DDR4-2400 or higher, resulting in 3 to 5 percent performance loss relative to matched-speed configurations.
- Warranty coverage for third-party RAM replacement varies by region; ASUS typically voids coverage only if installation damage occurs, though memory-related claims may face scrutiny.
- The SO-DIMM form factor necessitates partial disassembly to access the slot; thermal paste disturbance during reinstallation represents the primary physical risk during upgrade.