DDR4 is the fourth generation of double data rate synchronous dynamic random-access memory (SDRAM), standardised by JEDEC and widely used in desktop, industrial and embedded computers. If you are searching for a "PC DDR4", you are looking for a computer that accepts DDR4 memory modules rather than the older DDR3 or the newer DDR5 generation. DDR4 runs at a nominal 1.2 V (down from DDR3's 1.5 V), uses 288-pin DIMMs in desktop and industrial form factors or 260-pin SO-DIMMs in compact and mini PCs, and supports data rates from 1600 MT/s up to 3200 MT/s in mainstream grades.
Key Technical Details of DDR4
| Attribute | DDR3 | DDR4 | DDR5 |
|---|---|---|---|
| Voltage | 1.5 V | 1.2 V | 1.1 V |
| Typical data rates | 800–2133 MT/s | 1600–3200 MT/s | 4800–6400+ MT/s |
| Module pins (UDIMM) | 240 | 288 | 288 (different keying) |
| SO-DIMM pins | 204 | 260 | 262 |
| Module capacity (common) | 2–8 GB | 4–32 GB | 16–64 GB |
| Power management | Board-level | Board-level | On-module PMIC |
| Availability & ecosystem | Legacy | Broad and mature | Growing |
Because DDR4 modules and controllers are manufactured in very high volumes, DDR4 platforms remain cost-effective, easy to source and extremely well validated. Industrial and embedded systems in particular favour DDR4 for long-lifecycle designs, where
