Xeon Platinum 8156 vs E5645
Primary details
Comparing Xeon E5645 and Xeon Platinum 8156 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1600 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.28 | no data |
| Market segment | Server | Server |
| Series | no data | Intel Xeon Platinum |
| Power efficiency | 3.76 | no data |
| Architecture codename | Westmere-EP (2010−2011) | Skylake (server) (2017−2019) |
| Release date | 16 March 2010 (14 years ago) | 25 April 2017 (7 years ago) |
| Launch price (MSRP) | $294 | $7,007 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Xeon E5645 and Xeon Platinum 8156 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 | 6 (Hexa-Core) | 4 (Quad-Core) |
| Threads | 12 | 8 |
| Base clock speed | 2.4 GHz | 3.6 GHz |
| Boost clock speed | 2.67 GHz | 3.7 GHz |
| Multiplier | no data | 36 |
| L1 cache | 64 KB (per core) | 256 KB |
| L2 cache | 256 KB (per core) | 4 MB |
| L3 cache | 12 MB (shared) | 16.5 MB |
| Chip lithography | 32 nm | 14 nm |
| Die size | 239 mm2 | no data |
| Maximum core temperature | 76 °C | 71 °C |
| Number of transistors | 1,170 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
Compatibility
Information on Xeon E5645 and Xeon Platinum 8156 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 (Multiprocessor) |
| Socket | FCLGA1366,LGA1366 | FCLGA3647 |
| Power consumption (TDP) | 80 Watt | 105 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5645 and Xeon Platinum 8156. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | 1.0 | 2.0 |
| Hyper-Threading Technology | + | + |
| TSX | - | + |
| Idle States | + | no data |
| Demand Based Switching | + | no data |
| PAE | 40 Bit | no data |
| Turbo Boost Max 3.0 | no data | - |
Security technologies
Xeon E5645 and Xeon Platinum 8156 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5645 and Xeon Platinum 8156 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Xeon Platinum 8156. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4-2666 |
| Maximum memory size | 288 GB | 768 GB |
| Max memory channels | 3 | 6 |
| Maximum memory bandwidth | 32 GB/s | 128.001 GB/s |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by Xeon E5645 and Xeon Platinum 8156.
| PCIe version | 2.0 | 3.0 |
| PCI Express lanes | no data | 48 |
Pros & cons summary
| Recency | 16 March 2010 | 25 April 2017 |
| Physical cores | 6 | 4 |
| Threads | 12 | 8 |
| Chip lithography | 32 nm | 14 nm |
| Power consumption (TDP) | 80 Watt | 105 Watt |
Xeon E5645 has 50% more physical cores and 50% more threads, and 31.3% lower power consumption.
Xeon Platinum 8156, on the other hand, has an age advantage of 7 years, and a 128.6% more advanced lithography process.
We couldn't decide between Xeon E5645 and Xeon Platinum 8156. We've got no test results to judge.
Should you still have questions on choice between Xeon E5645 and Xeon Platinum 8156, 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.
