Xeon E-2456 vs Atom Z520
Aggregate performance score
Xeon E-2456 outperforms Atom Z520 by a whopping 18600% based on our aggregate benchmark results.
Primary details
Comparing Atom Z520 and Xeon E-2456 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3387 | 469 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 93.22 |
| Market segment | Laptop | Server |
| Series | Intel Atom | no data |
| Power efficiency | 3.79 | 17.70 |
| Architecture codename | Silverthorne (2008−2010) | Raptor Lake-S (2023−2024) |
| Release date | 2 April 2008 (16 years ago) | 14 December 2023 (less than a year ago) |
| Launch price (MSRP) | $65 | $375 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Atom Z520 and Xeon E-2456 basic parameters such as 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 | 1 (Single-Core) | 6 (Hexa-Core) |
| Threads | 2 | 12 |
| Base clock speed | 1.33 GHz | 3.3 GHz |
| Boost clock speed | 0.03 GHz | 5.1 GHz |
| Bus type | FSB | no data |
| Bus rate | 533.33 MT/s | 16 GT/s |
| Multiplier | 10 | no data |
| L1 cache | 56 KB | 80 KB (per core) |
| L2 cache | 512 KB | 1.25 MB (per core) |
| L3 cache | 0 KB | 18 MB (shared) |
| Chip lithography | 45 nm | Intel 7 nm |
| Die size | 24.18 mm2 | 163 mm2 |
| Maximum core temperature | 90 °C | 100 °C |
| Number of transistors | 47 Million | no data |
| 64 bit support | - | + |
| Windows 11 compatibility | - | no data |
| VID voltage range | 0.75-1.1V | no data |
Compatibility
Information on Atom Z520 and Xeon E-2456 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 | 1 (Uniprocessor) | 1 |
| Socket | PBGA441 | FCLGA1700 |
| Power consumption (TDP) | 2 Watt | 80 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom Z520 and Xeon E-2456. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE2, Intel® SSE3, Intel® SSSE3 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | 2 |
| Hyper-Threading Technology | + | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | + | no data |
| Turbo Boost Max 3.0 | no data | - |
| FSB parity | - | no data |
Security technologies
Atom Z520 and Xeon E-2456 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom Z520 and Xeon E-2456 are enumerated here.
| VT-d | - | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom Z520 and Xeon E-2456. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5-4800 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 2 |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | N/A |
Peripherals
Specifications and connection of peripherals supported by Atom Z520 and Xeon E-2456.
| PCIe version | no data | 5 |
| PCI Express lanes | no data | 16 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 0.08 | 14.96 |
| Recency | 2 April 2008 | 14 December 2023 |
| Physical cores | 1 | 6 |
| Threads | 2 | 12 |
| Power consumption (TDP) | 2 Watt | 80 Watt |
Atom Z520 has 3900% lower power consumption.
Xeon E-2456, on the other hand, has a 18600% higher aggregate performance score, an age advantage of 15 years, and 500% more physical cores and 500% more threads.
The Xeon E-2456 is our recommended choice as it beats the Atom Z520 in performance tests.
Be aware that Atom Z520 is a notebook processor while Xeon E-2456 is a server/workstation one.
Should you still have questions on choice between Atom Z520 and Xeon E-2456, ask them in Comments section, and we shall answer.
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