Atom Z2520 vs Xeon E5-2666 V3
Primary details
Comparing Xeon E5-2666 V3 and Atom Z2520 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 854 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Laptop |
| Power efficiency | 6.28 | no data |
| Architecture codename | Haswell-EP (2014−2015) | Clovertrail (2013) |
| Release date | 13 November 2014 (10 years ago) | 27 February 2013 (11 years ago) |
Detailed specifications
Xeon E5-2666 V3 and Atom Z2520 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 | 10 (Deca-Core) | 2 (Dual-core) |
| Threads | 20 | 4 |
| Base clock speed | 2.9 GHz | 1.2 GHz |
| Boost clock speed | 3.5 GHz | 1.2 GHz |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 256K (per core) | 512 KB (per core) |
| L3 cache | 25 MB (shared) | 0 KB |
| Chip lithography | 22 nm | 32 nm |
| Die size | 356 mm2 | 65 mm2 |
| Maximum core temperature | no data | 90 °C |
| Number of transistors | 2,600 million | 140 million |
| 64 bit support | + | - |
| Windows 11 compatibility | no data | - |
Compatibility
Information on Xeon E5-2666 V3 and Atom Z2520 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 | 2011-3 | FC-MB4760 |
| Power consumption (TDP) | 135 Watt | 3 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5-2666 V3 and Atom Z2520. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE2, Intel® SSE3, Intel® SSSE3 |
| AES-NI | + | - |
| AVX | + | - |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Hyper-Threading Technology | no data | + |
| TSX | + | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| PAE | no data | 32 Bit |
| Smart Idle | no data | + |
Security technologies
Xeon E5-2666 V3 and Atom Z2520 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5-2666 V3 and Atom Z2520 are enumerated here.
| VT-d | + | no data |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5-2666 V3 and Atom Z2520. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3, DDR4 2133 MHz Quad-channel | DDR2 |
| Maximum memory size | no data | 2 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 8.5 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | SGX 544MP2 |
Graphics interfaces
Available interfaces and connections of Xeon E5-2666 V3 and Atom Z2520 integrated GPUs.
| Number of displays supported | no data | 2 |
Peripherals
Specifications and connection of peripherals supported by Xeon E5-2666 V3 and Atom Z2520.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 40 | no data |
| USB revision | no data | 2.0 OTG, USB-SPH 2.0 |
| Number of USB ports | no data | 2 |
| UART | no data | 3 |
Pros & cons summary
| Recency | 13 November 2014 | 27 February 2013 |
| Physical cores | 10 | 2 |
| Threads | 20 | 4 |
| Chip lithography | 22 nm | 32 nm |
| Power consumption (TDP) | 135 Watt | 3 Watt |
Xeon E5-2666 V3 has an age advantage of 1 year, 400% more physical cores and 400% more threads, and a 45.5% more advanced lithography process.
Atom Z2520, on the other hand, has 4400% lower power consumption.
We couldn't decide between Xeon E5-2666 V3 and Atom Z2520. We've got no test results to judge.
Be aware that Xeon E5-2666 V3 is a server/workstation processor while Atom Z2520 is a notebook one.
Should you still have questions on choice between Xeon E5-2666 V3 and Atom Z2520, ask them in Comments section, and we shall answer.
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