Core 2 Duo E6400 vs Xeon E5-2678 v3
Aggregate performance score
Xeon E5-2678 v3 outperforms Core 2 Duo E6400 by a whopping 1792% based on our aggregate benchmark results.
Primary details
Comparing Xeon E5-2678 v3 and Core 2 Duo E6400 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 827 | 2902 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Desktop processor |
| Series | Xeon | no data |
| Power efficiency | 7.31 | 0.71 |
| Architecture codename | Haswell (2013−2015) | Conroe (2006−2007) |
| Release date | 2015 (9 years ago) | July 2006 (18 years ago) |
Detailed specifications
Xeon E5-2678 v3 and Core 2 Duo E6400 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 | 12 (Dodeca-Core) | 2 (Dual-core) |
| Threads | 24 | 2 |
| Base clock speed | 2.5 GHz | 2.13 GHz |
| Boost clock speed | 3.3 GHz | 2.13 GHz |
| Bus rate | no data | 1066 MHz |
| L1 cache | 384 KB | 64 KB |
| L2 cache | 3072 KB | 2 MB |
| L3 cache | 30 MB | 0 KB |
| Chip lithography | 22 nm | 65 nm |
| Die size | 356 mm2 | 143 mm2 |
| Maximum core temperature | no data | 61 °C |
| Maximum case temperature (TCase) | 84 °C | no data |
| Number of transistors | 5,560 million | 291 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | no data | 0.85V-1.5V |
Compatibility
Information on Xeon E5-2678 v3 and Core 2 Duo E6400 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 | LGA2011-3 | LGA775,PLGA775 |
| Power consumption (TDP) | 120 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5-2678 v3 and Core 2 Duo E6400. You'll probably need this information if you require some particular technology.
| AES-NI | + | - |
| AVX | + | - |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | no data | - |
| TSX | + | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | no data | - |
| FSB parity | no data | - |
Security technologies
Xeon E5-2678 v3 and Core 2 Duo E6400 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5-2678 v3 and Core 2 Duo E6400 are enumerated here.
| VT-d | + | no data |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5-2678 v3 and Core 2 Duo E6400. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3, DDR4 | DDR1, DDR2, DDR3 |
Peripherals
Specifications and connection of peripherals supported by Xeon E5-2678 v3 and Core 2 Duo E6400.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 40 | no data |
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.
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.
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.
Pros & cons summary
| Performance score | 9.27 | 0.49 |
| Physical cores | 12 | 2 |
| Threads | 24 | 2 |
| Chip lithography | 22 nm | 65 nm |
| Power consumption (TDP) | 120 Watt | 65 Watt |
Xeon E5-2678 v3 has a 1791.8% higher aggregate performance score, 500% more physical cores and 1100% more threads, and a 195.5% more advanced lithography process.
Core 2 Duo E6400, on the other hand, has 84.6% lower power consumption.
The Xeon E5-2678 v3 is our recommended choice as it beats the Core 2 Duo E6400 in performance tests.
Be aware that Xeon E5-2678 v3 is a server/workstation processor while Core 2 Duo E6400 is a desktop one.
Should you still have questions on choice between Xeon E5-2678 v3 and Core 2 Duo E6400, ask them in Comments section, and we shall answer.
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