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| 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 |
Benchmarks Real world tests of Pentium G840 vs Core2 Duo E8400
GeekBench 3 (Multi-core) Data courtesy Primate Labs
Pentium G840
3,538
Core2 Duo E8400
2,982
GeekBench 3 (Single core) Data courtesy Primate Labs
Pentium G840
1,979
Core2 Duo E8400
1,625
GeekBench 3 (AES single core) Data courtesy Primate Labs
Pentium G840
138,400 MB/s
Core2 Duo E8400
128,000 MB/s
GeekBench (32-bit) Data courtesy Primate Labs
Pentium G840
3,515
Core2 Duo E8400
2,826
GeekBench (64-bit) Data courtesy Primate Labs
Pentium G840
3,906
Core2 Duo E8400
3,092
GeekBench
Pentium G840
4,603
Core2 Duo E8400
4,794
PassMark Data courtesy Passmark
Pentium G840
2,571
Core2 Duo E8400
2,160
PassMark (Single Core)
Pentium G840
1,458
Core2 Duo E8400
1,251
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 ![]() | Intel Core2 Duo E8400 ![]() |
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