Intel Core2 Duo E8400 vs AMD Opteron 840 |
Released January, 2008
Intel Core2 Duo E8400
- 3 GHz
- Dual core
Reasons to buy the Intel Core2 Duo E8400
 | Much more l2 cache 6 MB | | Much newer manufacturing process 45 nm |
| | Much higher clock speed 3 GHz | | Much more l2 cache per core 3 MB/core |
VS
Released June, 2003
AMD Opteron 840
- 1.4 GHz
- Single core
Reasons to buy the AMD Opteron 840
| | Supports more CPUs in SMP configuration 8 |
Cast your vote Do you agree or disagree with CPUBoss?
VS
Differences What are the advantages of each
| |||||||
| 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 newer manufacturing process | 45 nm | vs | 130 nm | A newer manufacturing process allows for a more powerful, yet cooler running processor | |||
| Much higher clock speed | 3 GHz | vs | 1.4 GHz | Around 2.2x higher clock speed | |||
| Much more l2 cache per core | 3 MB/core | vs | 1 MB/core | 3x more l2 cache per core | |||
| Much better overclocked clock speed (Air) | 4.22 GHz | vs | 1.69 GHz | More than 2.5x better overclocked clock speed (Air) | |||
| Lower typical power consumption | 52.81W | vs | 66.71W | More than 20% lower typical power consumption | |||
| Newer | Jan, 2008 | vs | Jun, 2003 | Release date over 4 years later | |||
| Much better overclocked clock speed (Water) | 4.23 GHz | vs | 1.4 GHz | More than 3x better overclocked clock speed (Water) | |||
| More cores | 2 | vs | 1 | Twice as many cores; run more applications at once | |||
| Lower annual commercial energy cost | 56.94 $/year | vs | 71.92 $/year | More than 20% lower annual commercial energy cost | |||
| Lower annual home energy cost | 15.66 $/year | vs | 19.78 $/year | More than 20% lower annual home energy cost | |||
| |||||||
| Supports more CPUs in SMP configuration | 8 | vs | 1 | 7 supports more CPUs in SMP configuration | |||
Report a correction
Features Key features of the Core2 Duo E8400 vs Opteron 840
clock speed
L2 cache
overclocked clock speed (air)
overclocked clock speed (water)
TDP
Specifications Full list of technical specs
summary | Core2 Duo E8400 | vs | Opteron 840 |
|---|---|---|---|
| Clock speed | 3 GHz | 1.4 GHz | |
| Cores | Dual core | Single core | |
| Socket type | |||
| LGA 775 | |||
| 940 | |||
features | |||
| Has a NX bit | Yes | Yes | |
| Instruction set extensions | |||
| SSE2 | |||
| MMX | |||
| SSE3 | |||
| SSE | |||
| SSE4.1 | |||
| 3DNow! | |||
| Supplemental SSE3 | |||
details | Core2 Duo E8400 | vs | Opteron 840 |
|---|---|---|---|
| Threads | 2 | 1 | |
| L2 cache | 6 MB | 1 MB | |
| L2 cache per core | 3 MB/core | 1 MB/core | |
| Manufacture process | 45 nm | 130 nm | |
| Max CPUs | 1 | 8 | |
| Clock multiplier | 9 | 7 | |
| Voltage range | 0.85 - 1.36V | 1.5 - UnknownV | |
overclocking | |||
| Overclocked clock speed | 4.22 GHz | 1.69 GHz | |
| Overclocked clock speed (Water) | 4.23 GHz | 1.4 GHz | |
| Overclocked clock speed (Air) | 4.22 GHz | 1.69 GHz | |
power consumption | |||
| TDP | 65W | 82.1W | |
| Annual home energy cost | 15.66 $/year | 19.78 $/year | |
| Annual commercial energy cost | 56.94 $/year | 71.92 $/year | |
| Typical power consumption | 52.81W | 66.71W | |
 Intel Core2 Duo E8400  Report a correction |  AMD Opteron 840 Report a correction |
Follow us
Compare
Related Comparisons
 | VS |  |
| $179 | ||
| Intel Core2 Duo E8400 vs Quad Q6600 | ||
| | VS |  |
| $179 | $125 | |
| Intel Core2 Duo E8400 vs Core i3 3220 | ||
| | VS |  |
| $179 | $125 | |
| Intel Core2 Duo E8400 vs E7500 | ||
| | VS |  |
| $179 | $179 | |
| Intel Core2 Duo E8400 vs Quad Q8400 | ||
| | VS |  |
| $179 | $64 | |
| Intel Core2 Duo E8400 vs Pentium E5700 | ||
| | VS |  |
| $179 | ||
| Intel Core2 Duo E8400 vs AMD Athlon II X2 250 | ||
| | VS |  |
| $179 | $287 | |
| Intel Core2 Duo E8400 vs Quad Q9550 | ||
Popular Comparisons
 | VS |  |
| $305 | $300 | |
| Intel Xeon W3520 vs Core i5 2500 | ||
 | VS |  |
| $272 | $350 | |
| Intel Core i7 4790K vs 6700K | ||
 | VS |  |
| $281 | ||
| Intel Core i5 4200U vs AMD A8 6410 | ||
 | VS |  |
| $281 | ||
| Intel Core i5 6200U vs AMD A9 7th Gen A9-9410 | ||
 | VS |  |
| $134 | $225 | |
| Intel Celeron 847 vs Core i3 3217U | ||
 | VS |  |
| $275 | $161 | |
| Intel Core i3 4005U vs Pentium N3540 | ||
 | VS |  |
| $180 | ||
| Intel Core i5 3470 vs AMD A6 5200 | ||
