Atom P5921B vs Xeon 6503P
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Designer | Intel | Intel |
| Manufacturer | Intel | Intel |
| Architecture codename | Granite Rapids (2024−2026) | Snow Ridge (2020−2022) |
| Release date | 31 May 2026 (less than a year ago) | 24 February 2020 (6 years ago) |
| Launch price (MSRP) | $676 | no data |
Detailed specifications
Basic parameters of Xeon 6503P and Atom P5921B: number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 8 (Octa-Core) | 8 (Octa-Core) |
| Threads | 16 | 8 |
| Base clock speed | 2.8 GHz | 2.2 GHz |
| Boost clock speed | 4.3 GHz | 2.2 GHz |
| L1 cache | 112 KB (per core) | 64 KB (per core) |
| L2 cache | 2 MB (per core) | 4.5 MB (per module) |
| L3 cache | 48 MB (shared) | 9 MB L2 Cache |
| Chip lithography | Intel 3 nm | 10 nm |
| Maximum case temperature (TCase) | 78 °C | no data |
| 64 bit support | + | + |
Compatibility
Information on Xeon 6503P and Atom P5921B compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 2 | 1 |
| Socket | FCLGA4710 | Intel BGA 2106 |
| Power consumption (TDP) | 135 Watt | no data |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon 6503P and Atom P5921B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 | Intel® SSE4.2 |
| AES-NI | + | + |
| AVX | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| QuickAssist | no data | + |
| Speed Shift | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | - |
| TSX | + | - |
| Idle States | no data | + |
| GPIO | no data | + |
| Turbo Boost Max 3.0 | no data | - |
| Deep Learning Boost | + | - |
Security technologies
Xeon 6503P and Atom P5921B technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| Secure Boot | no data | + |
| SGX | + | - |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon 6503P and Atom P5921B are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon 6503P and Atom P5921B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5(6400MT/s) | DDR4 |
| Maximum memory size | 4 TB | 64 GB |
| Max memory channels | 8 | 1 |
| ECC memory support | + | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | N/A |
Peripherals
Specifications and connection of peripherals supported by Xeon 6503P and Atom P5921B.
| PCIe version | 5.0 | 3.0 |
| PCI Express lanes | 88 | 32 |
| PCI support | no data | 16x PCIe 3.0, 16x PCIe 2.0 |
| USB revision | no data | 2.0, 3.0 |
| Total number of SATA ports | no data | 16 |
| Integrated IDE | no data | - |
| Number of USB ports | no data | 8 |
| Integrated LAN | no data | + |
| UART | no data | 3 |
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