Xeon E7-8891 v2 vs E5-2666 V3
Primary details
Comparing Xeon E5-2666 V3 and Xeon E7-8891 v2 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 847 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Power efficiency | 6.30 | no data |
| Architecture codename | Haswell-EP (2014−2015) | no data |
| Release date | 13 November 2014 (9 years ago) | 1 January 2014 (10 years ago) |
Detailed specifications
Xeon E5-2666 V3 and Xeon E7-8891 v2 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) | 10 (Deca-Core) |
| Threads | 20 | 20 |
| Base clock speed | 2.9 GHz | 3.2 GHz |
| Boost clock speed | 3.5 GHz | 3.7 GHz |
| Bus rate | no data | 8 GT/s |
| L1 cache | 64K (per core) | no data |
| L2 cache | 256K (per core) | no data |
| L3 cache | 25 MB (shared) | 37.5 MB |
| Chip lithography | 22 nm | 22 nm |
| Die size | 356 mm2 | no data |
| Maximum core temperature | no data | 77 °C |
| Number of transistors | 2,600 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | - |
Compatibility
Information on Xeon E5-2666 V3 and Xeon E7-8891 v2 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 | 8 |
| Socket | 2011-3 | FCLGA2011 |
| Power consumption (TDP) | 135 Watt | 155 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5-2666 V3 and Xeon E7-8891 v2. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® AVX |
| AES-NI | + | + |
| AVX | + | - |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | + | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| PAE | no data | 46 Bit |
Security technologies
Xeon E5-2666 V3 and Xeon E7-8891 v2 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | no data | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5-2666 V3 and Xeon E7-8891 v2 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5-2666 V3 and Xeon E7-8891 v2. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3, DDR4 2133 MHz Quad-channel | DDR3-1066, DDR3-1333, DDR3-1600 |
| Maximum memory size | no data | 1.5 TB |
| Max memory channels | no data | 4 |
| Maximum memory bandwidth | no data | 85 GB/s |
| ECC memory support | - | + |
Peripherals
Specifications and connection of peripherals supported by Xeon E5-2666 V3 and Xeon E7-8891 v2.
| PCIe version | 3.0 | 3.0 |
| PCI Express lanes | 40 | 32 |
Pros & cons summary
| Recency | 13 November 2014 | 1 January 2014 |
| Power consumption (TDP) | 135 Watt | 155 Watt |
Xeon E5-2666 V3 has an age advantage of 10 months, and 14.8% lower power consumption.
We couldn't decide between Xeon E5-2666 V3 and Xeon E7-8891 v2. We've got no test results to judge.
Should you still have questions on choice between Xeon E5-2666 V3 and Xeon E7-8891 v2, ask them in Comments section, and we shall answer.
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