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 | 6400 MT/s (MRDIMM up to 8800 MT/s) |
| Voltage | 1.2V | 1.1V |
| Channels per CPU | 6 (Intel) / 8 (AMD) | 8 (Xeon 4th/5th Gen) / 12 (Xeon 6900P, AMD) |
| On-die ECC | No | Yes |
| Price per GB | Lower (mature market) | Higher (declining) |
Which Servers Use Which?
- DDR4: Dell 13G-15G, HPE Gen9-Gen10+, Lenovo V1-V2
- DDR5: Dell 16G+, HPE Gen11+, Lenovo V3+