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已解决!
参数上看，i7-620M仅仅是三级缓存大一些，为4M，i5-580M的三级缓存为3M，主频一样，其他的参数也都基本一致。
价格如果一样，选i7，价格差挺多的话，选i5
主要参数介绍
i7-620M
- Essentials | |
| Status | Launched |
| Launch Date | Q1'10 |
| Processor Number | i7-620M |
| Intel® Smart Cache | 4 MB |
| DMI | 2.5 GT/s |
| Instruction Set | 64-bit |
| Instruction Set Extensions | SSE4.1/4.2 |
Embedded Options Available | Yes |
| Lithography | 32 nm |
| Recommended Customer Price | TRAY: $282.00 |
| Datasheet | Link |
- Performance | |
| # of Cores | 2 |
| # of Threads | 4 |
| Processor Base Frequency | 2.66 GHz |
| Max Turbo Frequency | 3.333 GHz |
| TDP | 35 W |
- Memory Specifications | |
| Max Memory Size (dependent on memory type) | 8 GB |
| Memory Types | DDR3 800/1066 |
| Max # of Memory Channels | 2 |
| Max Memory Bandwidth | 17.1 GB/s |
| Physical Address Extensions | 36-bit |
| ECC Memory Supported ‡ | No |
- Graphics Specifications | |
| Processor Graphics ‡ | Intel® HD Graphics |
| Graphics Base Frequency | 500 MHz |
| Graphics Max Dynamic Frequency | 766 MHz |
| Intel® Flexible Display Interface (Intel® FDI) | Yes |
| Intel® Clear Video HD Technology | Yes |
| Intel® Clear Video Technology | Yes |
| Macrovision* License Required | No |
| # of Displays Supported ‡ | 2 |
i5-580M
| Status | End of Interactive Support |
| Launch Date | Q3'10 |
| Processor Number | i5-580M |
| Intel® Smart Cache | 3 MB |
| DMI | 2.5 GT/s |
| Instruction Set | 64-bit |
| Instruction Set Extensions | SSE4.1/4.2 |
| Embedded Options Available | No |
| Lithography | 32 nm |
| Recommended Customer Price | N/A |
| Datasheet | Link |
- Performance | |
| # of Cores | 2 |
| # of Threads | 4 |
| Processor Base Frequency | 2.66 GHz |
| Max Turbo Frequency | 3.33 GHz |
| TDP | 35 W |
- Memory Specifications | |
| Max Memory Size (dependent on memory type) | 8 GB |
| Memory Types | DDR3 800/1066 |
| Max # of Memory Channels | 2 |
| Max Memory Bandwidth | 17.1 GB/s |
| Physical Address Extensions | 36-bit |
| ECC Memory Supported ‡ | No |
- Graphics Specifications | |
| Processor Graphics ‡ | Intel® HD Graphics |
| Graphics Base Frequency | 500 MHz |
| Graphics Max Dynamic Frequency | 766 MHz |
| Intel® Flexible Display Interface (Intel® FDI) | Yes |
| Intel® Clear Video HD Technology | Yes |
| Intel® Clear Video Technology | Yes |
| Macrovision* License Required | No |
| # of Displays Supported ‡ | 2 |
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