Phenom II X2 X640 BE vs Xeon E5645
Aggregate performance score
Xeon E5645 outperforms Phenom II X2 X640 BE by a whopping 215% based on our aggregate benchmark results.
Primary details
Comparing Xeon E5645 and Phenom II X2 X640 BE processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1605 | 2455 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.25 | no data |
| Market segment | Server | Laptop |
| Series | no data | 2x AMD Phenom II |
| Power efficiency | 3.76 | 2.12 |
| Architecture codename | Westmere-EP (2010−2011) | Champlain (2010−2011) |
| Release date | 16 March 2010 (14 years ago) | 12 May 2011 (13 years ago) |
| Launch price (MSRP) | $294 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Xeon E5645 and Phenom II X2 X640 BE 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) | 2 (Dual-core) |
| Threads | 12 | 2 |
| Base clock speed | 2.4 GHz | no data |
| Boost clock speed | 2.67 GHz | 3.2 GHz |
| Bus rate | no data | 3600 MHz |
| L1 cache | 64 KB (per core) | 256 KB |
| L2 cache | 256 KB (per core) | 2 MB |
| L3 cache | 12 MB (shared) | no data |
| Chip lithography | 32 nm | 45 nm |
| Die size | 239 mm2 | no data |
| Maximum core temperature | 76 °C | no data |
| Number of transistors | 1,170 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Xeon E5645 and Phenom II X2 X640 BE 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 | no data |
| Socket | FCLGA1366,LGA1366 | S1 |
| Power consumption (TDP) | 80 Watt | 45 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5645 and Phenom II X2 X640 BE. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | MMX, 3DNow!, SSE1-3A, AMD64, Enhanced Virus Protection, Virtualization |
| AES-NI | + | - |
| VirusProtect | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | 1.0 | no data |
| Hyper-Threading Technology | + | no data |
| Idle States | + | no data |
| Demand Based Switching | + | no data |
| PAE | 40 Bit | no data |
Security technologies
Xeon E5645 and Phenom II X2 X640 BE technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5645 and Phenom II X2 X640 BE are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Phenom II X2 X640 BE. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 288 GB | no data |
| Max memory channels | 3 | no data |
| Maximum memory bandwidth | 32 GB/s | no data |
| ECC memory support | + | - |
Peripherals
Specifications and connection of peripherals supported by Xeon E5645 and Phenom II X2 X640 BE.
| PCIe version | 2.0 | no data |
Pros & cons summary
| Performance score | 3.18 | 1.01 |
| Recency | 16 March 2010 | 12 May 2011 |
| Physical cores | 6 | 2 |
| Threads | 12 | 2 |
| Chip lithography | 32 nm | 45 nm |
| Power consumption (TDP) | 80 Watt | 45 Watt |
Xeon E5645 has a 214.9% higher aggregate performance score, 200% more physical cores and 500% more threads, and a 40.6% more advanced lithography process.
Phenom II X2 X640 BE, on the other hand, has an age advantage of 1 year, and 77.8% lower power consumption.
The Xeon E5645 is our recommended choice as it beats the Phenom II X2 X640 BE in performance tests.
Be aware that Xeon E5645 is a server/workstation processor while Phenom II X2 X640 BE is a notebook one.
Should you still have questions on choice between Xeon E5645 and Phenom II X2 X640 BE, ask them in Comments section, and we shall answer.
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