Intel Atom P5721 vs Intel Atom P5921B: comparison
Comparison of Intel Atom P5721 and Intel Atom P5921B: key differences and a full specification table.
Key differences
Intel Atom P5721 has a higher maximum memory size (256 GB vs 64 GB) and more memory channels (2 vs 1).
Both processors match on: core count (8), thread count (8), base clock (2.2 GHz), process node (10 nm), PCIe version (3).
These are specification values: they show differences between the models but do not determine a performance winner. For a specific workload, rely on independent benchmarks.
Key specifications
| Parameter | Intel Atom P5721 | Intel Atom P5921B |
|---|---|---|
| Cores / threads | 8 / 8 | 8 / 8 |
| TDP | 48 W | — |
| Process | 10 nm | 10 nm |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | Intel Atom P5721 | Intel Atom P5921B |
|---|---|---|
| General | ||
| Model | P5721 | P5921B |
| Codename | Snow Ridge | Snow Ridge |
| Segment | Server | Server |
| Product line | Процессоры Intel Atom серии P | Процессоры Intel Atom серии P |
| Process | 10 nm | 10 nm |
| Launch date | Q2 2022 | Q1 2020 |
| Status | Launched | Discontinued |
| Embedded options available | No | Yes |
| Use conditions | Communications Extended Temp | Base Transceiver Station |
| CPU | ||
| Cores | 8 | 8 |
| Threads | 8 | 8 |
| Multithreading (SMT/HT) | No | No |
| Efficient cores | 8 | — |
| Base clock | 2.2 GHz | 2.2 GHz |
| L2 cache | — | 9 MB |
| Cache (level unspecified) | 9 MB | — |
| TDP | 48 W | — |
| 64-bit support | Yes | Yes |
| Instruction set width | 64 bit | 64 bit |
| Instruction set extensions | SSE4.2 | SSE4.2 |
| QPI links | 0 | 0 |
| UPI links | 0 | 0 |
| Memory | ||
| Max memory size | 256 GB | 64 GB |
| Memory types | DDR4 | DDR4 |
| Memory channels | 2 | 1 |
| Max memory speed | 2.933 GHz | 2.933 GHz |
| ECC memory supported | Yes | Yes |
| Optane Persistent Memory Supported | — | No |
| I/O and interfaces | ||
| PCI Express revision | 3 | 3 |
| Chipset PCIe revision | 3 | — |
| PCI Express lanes | 32 | 32 |
| PCI Express configurations | x4,x8,x16 | x4, x8, x16 |
| Scalability | 1S Only | 1S Only |
| USB revision | 3 | 3 |
| USB ports | 8 | 8 |
| SATA ports | 16 | 16 |
| Integrated LAN | Yes | Yes |
| UART | 3 | 3 |
| General purpose I/O | Yes | Yes |
| Integrated IDE | No | No |
| PCI support | — | 16x PCIe 3.0, 16x PCIe 2.0 |
| Package and thermal | ||
| Sockets supported | FCBGA2106 | — |
| Max CPU configuration | 1 | 1 |
| Package size | 47.5mm x 47.5mm | 47.5mm x 47.5mm |
| Min operating temperature | — | -40 °C |
| Max operating temperature | — | 85 °C |
| Operating temperature range | — | -40°C to 85°C |
| Security and virtualization | ||
| Virtualization (VT-x / AMD-V) | Yes | Yes |
| Virtualization for Directed I/O (VT-d) | Yes | Yes |
| Extended Page Tables (EPT) | — | Yes |
| AES-NI | Yes | Yes |
| Execute Disable Bit | Yes | Yes |
| Intel Trusted Execution Technology | Yes | Yes |
| Secure Key | Yes | Yes |
| Intel Boot Guard | Yes | Yes |
| Intel Software Guard Extensions | No | No |
| Technologies | ||
| Enhanced SpeedStep | Yes | — |
| Idle States | Yes | Yes |
| Volume Management Device | No | No |
| Turbo Boost Max 3.0 | No | No |
| Thermal Velocity Boost | No | No |
| Optane Memory Supported | No | No |
| Resource Director Technology | Yes | Yes |