Intel Xeon L5420 vs Core2 Quad Q8400 |
Released March, 2008
Intel Xeon L5420
- 2.5 GHz
- Quad core
Reasons to buy the Intel Xeon L5420
 | Much more l2 cache 12 MB | | Much lower typical power consumption 40.63W |
| | Much more l2 cache per core 3 MB/core | | Supports more CPUs in SMP configuration 2 |
VS
Released April, 2009
Intel Core2 Quad Q8400
- 2.66 GHz
- Quad core
Reasons to buy the Core2 Quad Q8400
| | Slightly higher clock speed 2.66 GHz | | Much better performance per dollar 0.79 pt/$ |
| | Higher Maximum operating temperature 71.4 °C | | Newer Apr, 2009 |
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Differences What are the advantages of each
| |||||||
| Much more l2 cache | 12 MB | vs | 4 MB | 3x more l2 cache; more data can be stored in the l2 cache for quick access later | |||
|---|---|---|---|---|---|---|---|
| Much lower typical power consumption | 40.63W | vs | 135.97W | 3.3x lower typical power consumption | |||
| Much more l2 cache per core | 3 MB/core | vs | 1 MB/core | 3x more l2 cache per core | |||
| Supports more CPUs in SMP configuration | 2 | vs | 1 | Twice as many CPUs in SMP configuration | |||
| Much lower annual home energy cost | 12.04 $/year | vs | 51.39 $/year | 4.3x lower annual home energy cost | |||
| Much lower annual commercial energy cost | 43.8 $/year | vs | 130.79 $/year | 3x lower annual commercial energy cost | |||
| Better performance per watt | 2.75 pt/W | vs | 0.94 pt/W | Around 3x better performance per watt | |||
| Slightly better overclocked clock speed (Air) | 3.67 GHz | vs | 3.48 GHz | More than 5% better overclocked clock speed (Air) | |||
| |||||||
| Slightly higher clock speed | 2.66 GHz | vs | 2.5 GHz | More than 5% higher clock speed | |||
| Much better performance per dollar | 0.79 pt/$ | vs | 0.33 pt/$ | More than 2.2x better performance per dollar | |||
| Higher Maximum operating temperature | 71.4 °C | vs | 57 °C | More than 25% higher Maximum operating temperature | |||
| Newer | Apr, 2009 | vs | Mar, 2008 | Release date over 1 years later | |||
Report a correction
Benchmarks Real world tests of Xeon L5420 vs Core2 Quad Q8400
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 | Xeon L5420 | vs | Core2 Quad Q8400 |
|---|---|---|---|
| Clock speed | 2.5 GHz | 2.66 GHz | |
| Cores | Quad core | Quad core | |
| Socket type | |||
| LGA 771 | |||
| LGA 775 | |||
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | No | 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 | 50W | 95W | |
| Annual home energy cost | 12.04 $/year | 51.39 $/year | |
| Annual commercial energy cost | 43.8 $/year | 130.79 $/year | |
| Performance per watt | 2.75 pt/W | 0.94 pt/W | |
| Typical power consumption | 40.63W | 135.97W | |
bus | |||
| Architecture | FSB | FSB | |
| Number of links | 1 | 1 | |
| Clock speed | 1,333 MHz | 1,333 MHz | |
details | Xeon L5420 | vs | Core2 Quad Q8400 |
|---|---|---|---|
| Architecture | x86-64 | x86-64 | |
| Threads | 4 | 4 | |
| L2 cache | 12 MB | 4 MB | |
| L2 cache per core | 3 MB/core | 1 MB/core | |
| Manufacture process | 45 nm | 45 nm | |
| Transistor count | 820,000,000 | 456,000,000 | |
| Max CPUs | 2 | 1 | |
| Clock multiplier | 7 | 8 | |
| Voltage range | 0.85 - 1.35V | 0.85 - 1.36V | |
| Operating temperature | Unknown - 57°C | Unknown - 71.4°C | |
overclocking | |||
| Overclocked clock speed | 3.67 GHz | 3.48 GHz | |
| Overclocked clock speed (Water) | 3.85 GHz | 3.91 GHz | |
| Overclocked clock speed (Air) | 3.67 GHz | 3.48 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 Xeon L5420  Report a correction |  Intel Core2 Quad Q8400 Report a correction |
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