Winner
Intel Core2 Duo P8400
CPUBoss recommends the Intel Core2 Duo P8400 based on its power consumption and value.
See full details Intel Core2 Duo T9400 vs P8400 |
Released July, 2008
Intel Core2 Duo T9400
- 2.53 GHz
- Dual core
2.7 Out of 10
Reasons to buy the Intel Core2 Duo T9400
 | Much more l2 cache 6 MB | | Higher clock speed 2.53 GHz |
| | Much more l2 cache per core 3 MB/core | | Better geekbench 2 (64-bit) score 2,679 |
VS
Released July, 2008
Intel Core2 Duo P8400
- 2.26 GHz
- Dual core
2.2 Out of 10
Reasons to buy the P8400
| | Lower typical power consumption 20.31W | | Lower annual home energy cost 6.02 $/year |
CPUBoss Review Our evaluation of T9400 vs P8400 among laptop CPUs (over 15W)
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 | |
| Sky Diver and Cloud Gate | |
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? | |
| Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more | |
Value | |
Are you paying a premium for performance? | |
| Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more | |
| 2.7 | CPUBoss Score |
Combination of all six facets | |
 | Winner |
Cast your vote Do you agree or disagree with CPUBoss?
VS
| |  | Intel Core2 Duo P8400CPUBoss Winner |
Differences What are the advantages of each
| |||||||
| Much more l2 cache | 6 MB | vs | 3 MB | 2x more l2 cache; more data can be stored in the l2 cache for quick access later | |||
|---|---|---|---|---|---|---|---|
| Higher clock speed | 2.53 GHz | vs | 2.26 GHz | More than 10% higher clock speed | |||
| Much more l2 cache per core | 3 MB/core | vs | 1.5 MB/core | 2x more l2 cache per core | |||
| Better geekbench 2 (64-bit) score | 2,679 | vs | 2,328 | More than 15% better geekbench 2 (64-bit) score | |||
| Better overclocked clock speed (Air) | 2.96 GHz | vs | 2.54 GHz | More than 15% better overclocked clock speed (Air) | |||
| Slightly better geekbench 3 single core score | 1,407 | vs | 1,251 | More than 10% better geekbench 3 single core score | |||
| Slightly better geekbench 2 (32-bit) score | 2,328 | vs | 2,110 | More than 10% better geekbench 2 (32-bit) score | |||
| Better overclocked clock speed (Water) | 2.53 GHz | vs | 2.26 GHz | More than 10% better overclocked clock speed (Water) | |||
| |||||||
| Lower typical power consumption | 20.31W | vs | 28.44W | Around 30% lower typical power consumption | |||
| Lower annual home energy cost | 6.02 $/year | vs | 8.43 $/year | Around 30% lower annual home energy cost | |||
Report a correction
Benchmarks Real world tests of Core2 Duo T9400 vs P8400
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 | Core2 Duo T9400 | vs | P8400 |
|---|---|---|---|
| Clock speed | 2.53 GHz | 2.26 GHz | |
| Cores | Dual core | Dual core | |
| Socket type | |||
| 478 | |||
| P | |||
| 479 | |||
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | Yes | Yes | |
| 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 | 35W | 25W | |
| Annual home energy cost | 8.43 $/year | 6.02 $/year | |
| Performance per watt | 3.5 pt/W | 4.4 pt/W | |
| Typical power consumption | 28.44W | 20.31W | |
bus | |||
| Architecture | FSB | FSB | |
| Number of links | 1 | 1 | |
| Clock speed | 1,066 MHz | 1,066 MHz | |
details | Core2 Duo T9400 | vs | P8400 |
|---|---|---|---|
| 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 | 410,000,000 | |
| Max CPUs | 1 | 1 | |
| Clock multiplier | 9 | 8 | |
| Voltage range | 1.05 - 1.16V | 1.05 - 1.15V | |
overclocking | |||
| Overclocked clock speed | 2.96 GHz | 2.54 GHz | |
| Overclocked clock speed (Water) | 2.53 GHz | 2.26 GHz | |
| Overclocked clock speed (Air) | 2.96 GHz | 2.54 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 T9400  Report a correction |  Intel Core2 Duo P8400 Report a correction |
Follow us
Compare
Related Comparisons
 | VS |  |
| $89 | $144 | |
| 520M vs T9400 | ||
 | VS | |
| $17 | $144 | |
| P8600 vs T9400 | ||
 | VS | |
| $15 | $144 | |
| P8700 vs T9400 | ||
 | VS | |
| $238 | $144 | |
| 3220 vs T9400 | ||
 | VS |  |
| $818 | $112 | |
| 3210M vs P8400 | ||
 | VS | |
| $225 | $112 | |
| 350M vs P8400 | ||
 | VS | |
| $75 | $112 | |
| T9600 vs P8400 | ||
Popular Comparisons
 | VS |  |
| $393 | $272 | |
| 6700K vs 4790K | ||
| | VS |  |
| $393 | $227 | |
| 6700K vs 6600K | ||
 | VS |  |
| $281 | ||
| 7410 vs 5200U | ||
 | VS |  |
| $741 | $661 | |
| 6500U vs 6200U | ||
| | VS | |
| $661 | $281 | |
| 6200U vs 5200U | ||
 | VS |  |
| $281 | ||
| 6410 vs 4200U | ||
 | VS |  |
| $300 | $399 | |
| 2500 vs W3520 | ||
