Intel Xeon E5640 vs E5520 |
Released March, 2010
Intel Xeon E5640
- 2.66 GHz
- Quad core
Reasons to buy the Intel Xeon E5640
 | Much higher clock speed 2.66 GHz | | Much more l3 cache 12 MB |
| | Significantly higher turbo clock speed 2.93 GHz | | Much better performance per watt 7.32 pt/W |
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Intel Xeon E5640CPUBoss Winner |  | |
Differences What are the advantages of each
| |||||||
| Much higher clock speed | 2.66 GHz | vs | 2.26 GHz | Around 20% higher clock speed | |||
|---|---|---|---|---|---|---|---|
| Much more l3 cache | 12 MB | vs | 8 MB | 50% more l3 cache; more data can be stored in the l3 cache for quick access later | |||
| Significantly higher turbo clock speed | 2.93 GHz | vs | 2.53 GHz | More than 15% higher turbo clock speed | |||
| Much better performance per watt | 7.32 pt/W | vs | 2.4 pt/W | More than 3x better performance per watt | |||
| Much better overclocked clock speed (Air) | 4.24 GHz | vs | 3.28 GHz | Around 30% better overclocked clock speed (Air) | |||
| Supports trusted computing | Yes | vs | No | Somewhat common; Allows for safer, more reliable computing | |||
| Supports more RAM | 294,912 MB | vs | 147,456 MB | Supports 2x more RAM | |||
| Newer manufacturing process | 32 nm | vs | 45 nm | A newer manufacturing process allows for a more powerful, yet cooler running processor | |||
| Much more l3 cache per core | 3 MB/core | vs | 2 MB/core | 50% more l3 cache per core | |||
| Better overclocked clock speed (Water) | 4.41 GHz | vs | 4.27 GHz | Around 5% better overclocked clock speed (Water) | |||
| Newer | Mar, 2010 | vs | Mar, 2009 | Release date 11 months later | |||
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| CPUBoss is not aware of any important advantages of the E5520 vs the E5640. | |||||||
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Benchmarks Real world tests of Xeon E5640 vs E5520
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
PassMark Data courtesy Passmark
PassMark (Single Core)
Specifications Full list of technical specs
summary | Xeon E5640 | vs | E5520 |
|---|---|---|---|
| Clock speed | 2.66 GHz | 2.26 GHz | |
| Turbo clock speed | 2.93 GHz | 2.53 GHz | |
| Cores | Quad core | Quad core | |
| Socket type | |||
| LGA 1366 | |||
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | Yes | No | |
| Has virtualization support | Yes | Yes | |
| Instruction set extensions | |||
| SSE2 | |||
| MMX | |||
| SSE4 | |||
| SSE3 | |||
| SSE | |||
| SSE4.1 | |||
| SSE4.2 | |||
| Supplemental SSE3 | |||
| AES | |||
| Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
| TDP | 80W | 80W | |
| Annual home energy cost | 19.27 $/year | 19.27 $/year | |
| Annual commercial energy cost | 70.08 $/year | 70.08 $/year | |
| Performance per watt | 7.32 pt/W | 2.4 pt/W | |
| Typical power consumption | 65W | 65W | |
memory controller | |||
| Memory controller | Built-in | Built-in | |
| Memory type | |||
| DDR3-1066 | |||
| DDR3-800 | |||
| DDR3 | |||
| Channels | Triple Channel | Triple Channel | |
| Supports ECC | Yes | Yes | |
| Maximum bandwidth | 25,599.99 MB/s | 25,599.99 MB/s | |
| Maximum memory size | 294,912 MB | 147,456 MB | |
details | Xeon E5640 | vs | E5520 |
|---|---|---|---|
| Architecture | x86-64 | x86-64 | |
| Threads | 8 | 8 | |
| L2 cache | 1 MB | 1 MB | |
| L2 cache per core | 0.25 MB/core | 0.25 MB/core | |
| L3 cache | 12 MB | 8 MB | |
| L3 cache per core | 3 MB/core | 2 MB/core | |
| Manufacture process | 32 nm | 45 nm | |
| Max CPUs | 2 | 2 | |
| Clock multiplier | 20 | 17 | |
| Voltage range | 0.75 - 1.35V | 0.75 - 1.35V | |
| Operating temperature | Unknown - 77.6°C | Unknown - 72°C | |
overclocking | |||
| Overclocked clock speed | 4.24 GHz | 3.28 GHz | |
| Overclocked clock speed (Water) | 4.41 GHz | 4.27 GHz | |
| Overclocked clock speed (Air) | 4.24 GHz | 3.28 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 | |
bus | |||
| Architecture | QPI | QPI | |
| Number of links | 2 | 2 | |
| Data rate | 46,928 MB/s | 46,928 MB/s | |
| Transfer rate | 5,860 MT/s | 5,860 MT/s | |
| Clock speed | 2,930 MHz | 2,930 MHz | |
 Intel Xeon E5640  Report a correction |  Intel Xeon E5520 Report a correction |
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