Performance per price, higher is better.
Xeon E5645 vs E3-1220 v2
Aggregated performance score
Xeon E3-1220 v2
2012
4 cores / 4 threads
3.05
E5645 outperforms E3-1220 v2 by 8% based on our aggregated benchmark results.
General info
Comparing Xeon E3-1220 v2 and Xeon E5645 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 1517 | 1474 |
| Place by popularity | not in top-100 | not in top-100 |
| Value for money | 7.12 | 0.99 |
| Market segment | Server | Server |
| Architecture codename | Ivy Bridge (2012−2013) | Westmere-EP (2010−2011) |
| Release date | 14 May 2012 (11 years old) | 16 March 2010 (14 years old) |
| Launch price (MSRP) | $220 | $294 |
| Current price | $50 (0.2x MSRP) | $250 (0.9x MSRP) |
Value for money
Xeon E3-1220 v2 has 619% better value for money than Xeon E5645.
Technical specs
Xeon E3-1220 v2 and Xeon E5645 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 | 4 (Quad-Core) | 6 (Hexa-Core) |
| Threads | 4 | 12 |
| Base clock speed | 3.1 GHz | 2.4 GHz |
| Boost clock speed | 3.5 GHz | 2.67 GHz |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 256 KB (per core) | 256 KB (per core) |
| L3 cache | 8 MB (shared) | 12 MB (shared) |
| Chip lithography | 22 nm | 32 nm |
| Die size | 160 mm2 | 239 mm2 |
| Maximum core temperature | no data | 76 °C |
| Number of transistors | 1,400 million | 1,170 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
Compatibility
Information on Xeon E3-1220 v2 and Xeon E5645 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 | 2 |
| Socket | FCLGA1155 | FCLGA1366,LGA1366 |
| Power consumption (TDP) | 69 Watt | 80 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E3-1220 v2 and Xeon E5645. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX | Intel® SSE4.2 |
| AES-NI | + | + |
| AVX | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 2.0 | 1.0 |
| Hyper-Threading Technology | - | + |
| TSX | - | no data |
| Idle States | + | + |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
| Demand Based Switching | + | + |
| PAE | no data | 40 Bit |
| Fast Memory Access | + | no data |
| Status | Discontinued | Discontinued |
Security technologies
Xeon E3-1220 v2 and Xeon E5645 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| Identity Protection | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E3-1220 v2 and Xeon E5645 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E3-1220 v2 and Xeon E5645. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 32.77 GB | 288 GB |
| Max memory channels | 2 | 3 |
| Maximum memory bandwidth | 25.6 GB/s | 32 GB/s |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by Xeon E3-1220 v2 and Xeon E5645.
| PCIe version | 3.0 | 2.0 |
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.
E5645 outperforms E3-1220 v2 by 8% based on our aggregated benchmark results.
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.
Benchmark coverage: 68%
E5645 outperforms E3-1220 v2 by 8% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
E3-1220 v2 outperforms E5645 by 68% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
E3-1220 v2 outperforms E5645 by 11% in GeekBench 5 Multi-Core.
Advantages and disadvantages
| Performance score | 3.05 | 3.29 |
| Recency | 14 May 2012 | 16 March 2010 |
| Physical cores | 4 | 6 |
| Threads | 4 | 12 |
| Cost | $220 | $294 |
| Chip lithography | 22 nm | 32 nm |
| Power consumption (TDP) | 69 Watt | 80 Watt |
We couldn't decide between Xeon E3-1220 v2 and Xeon E5645. The differences in performance seem too small.
Should you still have questions on choice between Xeon E3-1220 v2 and Xeon E5645, 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.
