Improperly-configured memory can result in significant performance reductions. For example, a misconfiguration on the latest Intel Xeon CPUs with 6-channel memory controllers can result in a 65% reduction in memory throughput. This can result in an application running at half the anticipated speed. As you’re considering a new system deployment, please work with our experts to ensure success.
The correct configuration depends upon several factors, including the type of CPUs, the product generation, and the design of the system motherboard. To use the tables below, first select which type and generation of system CPUs will be in use. Then look to the rows which show the optimal memory capacities.
Intel Xeon Scalable 'Skylake-SP' CPUs
Memory Capacity | 1-socket Xeon Scalable | 2-socket Xeon Scalable | 4-socket Xeon Scalable |
---|---|---|---|
24GB | ✔ | ||
32GB | |||
48GB | ✔ | ✔ | |
64GB | |||
96GB | ✔ | ✔ | ✔ |
128GB | |||
192GB | ✔ | ✔ | ✔ |
256GB | |||
384GB | ✔ | ✔ | ✔ |
512GB | |||
768GB | ⓬ | ✔ | ✔ |
1TB | |||
1.5TB | ⓬ | ✔ | |
2TB | |||
3TB | ⓬ |
✔ supported in all standard platforms (these provide at least 6 DIMM slots per CPU socket)
⓬ only supported in platforms with 12 DIMM slots per CPU socket
Intel Xeon E5-series 'Broadwell' CPUs
Memory Capacity | 1-socket Xeon E5-2600v4 | 2-socket Xeon E5-2600v4 | 4-socket Xeon E5-4600v4 |
---|---|---|---|
24GB | |||
32GB | ✔ | ✔ | |
48GB | |||
64GB | ✔ | ✔ | ✔ |
96GB | |||
128GB | ✔ | ✔ | ✔ |
192GB | |||
256GB | ✔ | ✔ | ✔ |
384GB | |||
512GB | ✔ | ✔ | ✔ |
768GB | ⓬ | ||
1TB | ✔ | ✔ | |
1.5TB | ⓬ | ||
2TB | ✔ | ||
3TB | ⓬ |
✔ supported in all standard platforms (these provide at least 8 DIMM slots per CPU socket)
⓬ only supported in platforms with 12 DIMM slots per CPU socket
AMD EPYC 7000-series 'Zen' CPUs
Memory Capacity | 1-socket EPYC 7000-series | 2-socket EPYC 7000-series |
---|---|---|
24GB | ||
32GB | ||
48GB | ||
64GB | ✔ | |
96GB | ||
128GB | ✔ | ✔ |
192GB | ||
256GB | ✔ | ✔ |
384GB | ||
512GB | ✔ | ✔ |
768GB | ||
1TB | ⓰ | ✔ |
1.5TB | ||
2TB | ⓰ | |
3TB |
✔ supported in all standard platforms (these provide at least 8 DIMM slots per CPU socket)
⓰ only supported in platforms with 16 DIMM slots per CPU socket
It should be noted that we consider a 64GB DIMM to be the largest available capacity in a single memory slot. Although 128GB and 256GB DIMMs are available, their extreme price and limited availability have made them impractical for most customer use cases.