Winner
Intel Core2 Duo E8400
CPUBoss recommends the Intel Core2 Duo E8400 based on its .
See full details Intel Core2 Duo E8400 vs E7400 |
Released January, 2008
Intel Core2 Duo E8400
- 3 GHz
- Dual core
3.3 Out of 10
Reasons to buy the Intel Core2 Duo E8400
 | Higher clock speed 3 GHz | | Supports trusted computing Yes |
| | Much better overclocked clock speed (Air) 4.22 GHz |
VS
Released January, 2008
Intel Core2 Duo E7400
- 2.8 GHz
- Dual core
3 Out of 10
Reasons to buy the E7400
| | Higher Maximum operating temperature 74.1 °C | | Better overclocked clock speed (Water) 4.58 GHz |
CPUBoss Review Our evaluation of E8400 vs E7400 among desktop CPUs (45 to 75W)
Performance | |
Benchmark performance using all cores | |
| PCMark 8 Home 3.0 Accelerated, PassMark and 1 more | |
Single-core Performance | |
Individual core benchmark performance | |
| PassMark (Single Core), Geekbench 3 Single Core and 1 more | |
Integrated Graphics | |
Integrated GPU performance for graphics | |
| Fire Strike | |
Integrated Graphics (OpenCL) | |
Integrated GPU performance for parallel computing | |
| CompuBench 1.5 Bitcoin mining and 4 more | |
Performance per Watt | |
How efficiently does the processor use electricity? | |
| Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more | |
Value | |
Are you paying a premium for performance? | |
| Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more | |
| 3.3 | CPUBoss Score |
Combination of all six facets | |
 | Winner |
Cast your vote Do you agree or disagree with CPUBoss?
VS
Differences What are the advantages of each
| |||||||
| Higher clock speed | 3 GHz | vs | 2.8 GHz | More than 5% higher clock speed | |||
|---|---|---|---|---|---|---|---|
| Supports trusted computing | Yes | vs | No | Somewhat common; Allows for safer, more reliable computing | |||
| Much better overclocked clock speed (Air) | 4.22 GHz | vs | 3.91 GHz | Around 10% better overclocked clock speed (Air) | |||
| |||||||
| Higher Maximum operating temperature | 74.1 °C | vs | 72.4 °C | Almost the same | |||
| Better overclocked clock speed (Water) | 4.58 GHz | vs | 4.23 GHz | Around 10% better overclocked clock speed (Water) | |||
Report a correction
Benchmarks Real world tests of Core2 Duo E8400 vs E7400
CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench
GeekBench 3 (Multi-core) Data courtesy Primate Labs
GeekBench 3 (Single core) Data courtesy Primate Labs
GeekBench 3 (AES single core) Data courtesy Primate Labs
GeekBench (32-bit) Data courtesy Primate Labs
GeekBench (64-bit) Data courtesy Primate Labs
PassMark Data courtesy Passmark
PassMark (Single Core)
Specifications Full list of technical specs
summary | Core2 Duo E8400 | vs | E7400 |
|---|---|---|---|
| Clock speed | 3 GHz | 2.8 GHz | |
| Cores | Dual core | Dual core | |
| Socket type | |||
| LGA 775 | |||
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | Yes | No | |
| Has virtualization support | Yes | Yes | |
| Instruction set extensions | |||
| SSE2 | |||
| MMX | |||
| SSE3 | |||
| SSE | |||
| SSE4.1 | |||
| Supplemental SSE3 | |||
| Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
| TDP | 65W | 65W | |
| Annual home energy cost | 15.66 $/year | 15.66 $/year | |
| Annual commercial energy cost | 56.94 $/year | 56.94 $/year | |
| Performance per watt | 1.83 pt/W | 1.52 pt/W | |
| Typical power consumption | 52.81W | 52.81W | |
bus | |||
| Architecture | FSB | FSB | |
| Number of links | 1 | 1 | |
| Clock speed | 1,333 MHz | 1,066 MHz | |
details | Core2 Duo E8400 | vs | E7400 |
|---|---|---|---|
| Architecture | x86-64 | x86-64 | |
| Threads | 2 | 2 | |
| L2 cache | 6 MB | 3 MB | |
| L2 cache per core | 3 MB/core | 1.5 MB/core | |
| Manufacture process | 45 nm | 45 nm | |
| Transistor count | 410,000,000 | 228,000,000 | |
| Max CPUs | 1 | 1 | |
| Clock multiplier | 9 | 10 | |
| Voltage range | 0.85 - 1.36V | 0.85 - 1.36V | |
| Operating temperature | Unknown - 72.4°C | Unknown - 74.1°C | |
overclocking | |||
| Overclocked clock speed | 4.22 GHz | 3.91 GHz | |
| Overclocked clock speed (Water) | 4.23 GHz | 4.58 GHz | |
| Overclocked clock speed (Air) | 4.22 GHz | 3.91 GHz | |
integrated graphics | |||
| GPU | None | None | |
| Label | N/A | N/A | |
| Latest DirectX | N/A | N/A | |
| Number of displays supported | N/A | N/A | |
| GPU clock speed | N/A | N/A | |
| Turbo clock speed | N/A | N/A | |
| 3DMark06 | N/A | N/A | |
 Intel Core2 Duo E8400  Report a correction |  Intel Core2 Duo E7400 Report a correction |
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