Intel Pentium G840 vs Core2 Duo E8400 |
Released April, 2011
Intel Pentium G840
- 2.8 GHz
- Dual core
Reasons to buy the Intel Pentium G840
 | Has a built-in GPU Yes | | Much newer manufacturing process 32 nm |
| | Newer Apr, 2011 |
VS
Released January, 2008
Intel Core2 Duo E8400
- 3 GHz
- Dual core
Reasons to buy the Core2 Duo E8400
| | Much more l2 cache 6 MB | | Much better overclocked clock speed (Air) 4.22 GHz |
| | Higher clock speed 3 GHz | | Supports trusted computing Yes |
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Differences What are the advantages of each
| |||||||
| Has a built-in GPU | Yes | vs | No | Somewhat common; A separate graphics adapter is not required | |||
|---|---|---|---|---|---|---|---|
| Much newer manufacturing process | 32 nm | vs | 45 nm | A newer manufacturing process allows for a more powerful, yet cooler running processor | |||
| Newer | Apr, 2011 | vs | Jan, 2008 | Release date over 3 years later | |||
| |||||||
| Much more l2 cache | 6 MB | vs | 1 MB | 6x more l2 cache; more data can be stored in the l2 cache for quick access later | |||
| Much better overclocked clock speed (Air) | 4.22 GHz | vs | 2.93 GHz | Around 45% better overclocked clock speed (Air) | |||
| 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 more l2 cache per core | 3 MB/core | vs | 0.5 MB/core | 6x more l2 cache per core | |||
| Significantly lower typical power consumption | 52.81W | vs | 71.53W | More than 25% lower typical power consumption | |||
| Significantly higher Maximum operating temperature | 72.4 °C | vs | 69.1 °C | Around 5% higher Maximum operating temperature | |||
| Much better overclocked clock speed (Water) | 4.23 GHz | vs | 2.8 GHz | More than 50% better overclocked clock speed (Water) | |||
| Much lower annual home energy cost | 15.66 $/year | vs | 27.42 $/year | Around 45% lower annual home energy cost | |||
| Lower annual commercial energy cost | 56.94 $/year | vs | 68.24 $/year | More than 15% lower annual commercial energy cost | |||
Report a correction
Benchmarks Real world tests of Pentium G840 vs Core2 Duo E8400
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
GeekBench
PassMark Data courtesy Passmark
PassMark (Single Core)
Specifications Full list of technical specs
summary | Pentium G840 | vs | Core2 Duo E8400 |
|---|---|---|---|
| Clock speed | 2.8 GHz | 3 GHz | |
| Cores | Dual core | Dual core | |
| Socket type | |||
| LGA 1155 | |||
| LGA 775 | |||
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | No | Yes | |
| Has virtualization support | Yes | Yes | |
| Instruction set extensions | |||
| SSE2 | |||
| MMX | |||
| SSE4 | |||
| SSE3 | |||
| SSE | |||
| SSE4.1 | |||
| SSE4.2 | |||
| Supplemental SSE3 | |||
| Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
| TDP | 65W | 65W | |
| Annual home energy cost | 27.42 $/year | 15.66 $/year | |
| Annual commercial energy cost | 68.24 $/year | 56.94 $/year | |
| Performance per watt | 1.93 pt/W | 1.83 pt/W | |
| Typical power consumption | 71.53W | 52.81W | |
details | Pentium G840 | vs | Core2 Duo E8400 |
|---|---|---|---|
| Architecture | x86-64 | x86-64 | |
| Threads | 2 | 2 | |
| L2 cache | 1 MB | 6 MB | |
| L2 cache per core | 0.5 MB/core | 3 MB/core | |
| Manufacture process | 32 nm | 45 nm | |
| Max CPUs | 1 | 1 | |
| Clock multiplier | 28 | 9 | |
| Operating temperature | Unknown - 69.1°C | Unknown - 72.4°C | |
overclocking | |||
| Overclocked clock speed | 2.93 GHz | 4.22 GHz | |
| Overclocked clock speed (Water) | 2.8 GHz | 4.23 GHz | |
| Overclocked clock speed (Air) | 2.93 GHz | 4.22 GHz | |
integrated graphics | |||
| GPU | GPU | None | |
| Label | Intel® HD Graphics | N/A | |
| Number of displays supported | 2 | N/A | |
| GPU clock speed | 850 MHz | N/A | |
| Turbo clock speed | 1,100 MHz | N/A | |
bus | |||
| Architecture | DMI | FSB | |
| Number of links | 1 | 1 | |
 Intel Pentium G840  Report a correction |  Intel Core2 Duo E8400 Report a correction |
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