DDR5 is the new standard for Intel 4th Gen Xeon and AMD EPYC 9004 servers. But DDR4 still dominates the installed base. This guide compares both for enterprise buyers.
Performance Comparison
| Feature | DDR4 | DDR5 |
|---|---|---|
| Max Speed | 3200 MT/s | 5600 MT/s |
| Max Module | 128GB | 256GB |
| Voltage | 1.2V | 1.1V |
| Channels per CPU | 6 (Intel) / 8 (AMD) | 8 (Intel) / 12 (AMD) |
| On-die ECC | No | Yes |
| Price per GB | $ (mature market) | $$ (declining) |
Which Servers Use Which?
- DDR4: Dell 13G-15G, HPE Gen8-Gen10+, Lenovo V1-V3
- DDR5: Dell 16G+, HPE Gen11+, Lenovo V4+