Xeon Platinum 8581V vs E5-2666 V3
Primary details
Comparing Xeon E5-2666 V3 and Xeon Platinum 8581V 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 | Server |
| Power efficiency | 6.28 | no data |
| Architecture codename | Haswell-EP (2014−2015) | Emerald Rapids (2023) |
| Release date | 13 November 2014 (10 years ago) | 14 December 2023 (less than a year ago) |
| Launch price (MSRP) | no data | $7,568 |
Detailed specifications
Xeon E5-2666 V3 and Xeon Platinum 8581V 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) | 60 (Hexaconta-Core) |
| Threads | 20 | 120 |
| Base clock speed | 2.9 GHz | 2 GHz |
| Boost clock speed | 3.5 GHz | 3.9 GHz |
| L1 cache | 64K (per core) | 80 KB (per core) |
| L2 cache | 256K (per core) | 2 MB (per core) |
| L3 cache | 25 MB (shared) | 300 MB (shared) |
| Chip lithography | 22 nm | Intel 7 nm |
| Die size | 356 mm2 | 2x 763 mm2 |
| Maximum case temperature (TCase) | no data | 74 °C |
| Number of transistors | 2,600 million | no data |
| 64 bit support | + | + |
Compatibility
Information on Xeon E5-2666 V3 and Xeon Platinum 8581V 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 | FCLGA4677 |
| Power consumption (TDP) | 135 Watt | 270 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5-2666 V3 and Xeon Platinum 8581V. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | + |
| vPro | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | + | + |
| Deep Learning Boost | - | + |
Security technologies
Xeon E5-2666 V3 and Xeon Platinum 8581V technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | no data | + |
| SGX | no data | Yes with Intel® SPS |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5-2666 V3 and Xeon Platinum 8581V 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 Platinum 8581V. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3, DDR4 2133 MHz Quad-channel | DDR5 @ 4800 MT/s (1 DPC) |
| Maximum memory size | no data | 4 TB |
| Max memory channels | no data | 8 |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Xeon E5-2666 V3 and Xeon Platinum 8581V.
| PCIe version | 3.0 | 5.0 |
| PCI Express lanes | 40 | 80 |
Pros & cons summary
| Recency | 13 November 2014 | 14 December 2023 |
| Physical cores | 10 | 60 |
| Threads | 20 | 120 |
| Power consumption (TDP) | 135 Watt | 270 Watt |
Xeon E5-2666 V3 has 100% lower power consumption.
Xeon Platinum 8581V, on the other hand, has an age advantage of 9 years, and 500% more physical cores and 500% more threads.
We couldn't decide between Xeon E5-2666 V3 and Xeon Platinum 8581V. We've got no test results to judge.
Should you still have questions on choice between Xeon E5-2666 V3 and Xeon Platinum 8581V, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
