Xeon E5440 vs X6550
Aggregate performance score
Xeon E5440 outperforms Xeon X6550 by a significant 23% based on our aggregate benchmark results.
Primary details
Comparing Xeon X6550 and Xeon E5440 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2323 | 2143 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Power efficiency | 0.89 | 1.77 |
| Release date | 1 January 2010 (14 years ago) | 1 January 2008 (16 years ago) |
Detailed specifications
Xeon X6550 and Xeon E5440 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 | 8 (Octa-Core) | no data |
| Threads | 16 | no data |
| Base clock speed | 2 GHz | 2.83 GHz |
| Boost clock speed | 2.4 GHz | no data |
| L3 cache | 18 MB L3 Cache | 12 MB L2 Cache |
| Chip lithography | 45 nm | 45 nm |
| Maximum core temperature | 69 °C | 67 °C |
| 64 bit support | - | + |
| Windows 11 compatibility | - | - |
| VID voltage range | no data | 0.85V-1.35V |
Compatibility
Information on Xeon X6550 and Xeon E5440 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.
| Socket | FCLGA1567 | LGA771 |
| Power consumption (TDP) | 130 Watt | 80 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon X6550 and Xeon E5440. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 1.0 | - |
| Hyper-Threading Technology | + | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | no data | + |
| FSB parity | no data | + |
Security technologies
Xeon X6550 and Xeon E5440 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon X6550 and Xeon E5440 are enumerated here.
| VT-x | + | + |
| EPT | + | - |
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.
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.
Pros & cons summary
| Performance score | 1.22 | 1.50 |
| Recency | 1 January 2010 | 1 January 2008 |
| Power consumption (TDP) | 130 Watt | 80 Watt |
Xeon X6550 has an age advantage of 2 years.
Xeon E5440, on the other hand, has a 23% higher aggregate performance score, and 62.5% lower power consumption.
The Xeon E5440 is our recommended choice as it beats the Xeon X6550 in performance tests.
Should you still have questions on choice between Xeon X6550 and Xeon E5440, ask them in Comments section, and we shall answer.
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