LENOVO ThinkPad E490s RAM upgrade specifications
The Lenovo ThinkPad E490s features DDR4-SDRAM memory upgrade specifications with 2x SO-DIMM slots supporting maximum RAM capacity of 32 GB. Compatible memory operates at 2400 MHz frequency with SO-DIMM form factor. Upgrade options allow expansion from factory-configured memory to the maximum supported specifications for enhanced system performance and multitasking capability.
Memory Upgrade Specifications
| Specification | Value |
|---|---|
| Memory slots | 2x SO-DIMM |
| Form factor | SO-DIMM |
| Memory type | DDR4-SDRAM |
| Frequency | 2400 MHz |
| Maximum RAM | 32 GB |
| Voltage | 1.2V |
| Number of pins | 260-pin |
| Interface | PC4 |
| PC Speed Rating | PC4-2400 (PC4-19200) |
| Bandwidth | 19.2 GB/s |
| Laptop Release date | 20 March 2019 |
Additional Notes
- The Lenovo ThinkPad E490s supports dual-channel memory architecture, enabling 64-bit data transfer per clock cycle; single-slot population will forfeit bandwidth efficiency and reduce system responsiveness in multithreaded workloads.
- Memory modules must adhere to SO-DIMM form factor (260-pin), which is mechanistically incompatible with standard UDIMM desktop memory; sourcing incorrect form factors will result in physical obstruction.
- DDR4-2400 frequency represents the baseline certified speed; higher-frequency modules (3200 MHz or above) will downclock to 2400 MHz due to BIOS constraints, resulting in wasted investment on premium memory specifications.
- Maximum capacity of 32 GB creates a hard ceiling; workloads exceeding this threshold cannot be resolved through memory expansion and will require consideration of alternative hardware platforms.
- The 2-slot configuration permits upgrade pathways only to 16 GB per module; replacing lower-capacity pairs with higher-capacity modules is the sole upgrade method available, as slot density cannot be increased.
- DDR4-2400 operates at 1.2 V standard voltage; low-power variants (1.35 V LPDDR4) are structurally and electrically incompatible and will not function in this platform.
- Warranty coverage typically remains valid during memory module installation if performed according to manufacturer guidelines; however, improper seating or static discharge during installation voids manufacturer liability.