CPU C-States
By pengyao - Last updated: 星期二, 十月 26, 2010 - Save & Share - 2 Comments
| Mode | Name | What it does | CPUs |
| C0 | Operating State | CPU fully turned on | All CPUs |
| C1 | Halt | Stops CPU main internal clocks via software; bus interface unit and APIC are kept running at full speed. | 486DX4 and above |
| C1E | Enhanced Halt | Stops CPU main internal clocks via software and reduces CPU voltage; bus interface unit and APIC are kept running at full speed. | All socket 775 CPUs |
| C1E | — | Stops all CPU internal clocks. | Turion 64, 65-nm Athlon X2 and Phenom CPUs |
| C2 | Stop Grant | Stops CPU main internal clocks via hardware; bus interface unit and APIC are kept running at full speed. | 486DX4 and above |
| C2 | Stop Clock | Stops CPU internal and external clocks via hardware | Only 486DX4, Pentium, Pentium MMX, K5, K6, K6-2, K6-III |
| C2E | Extended Stop Grant | Stops CPU main internal clocks via hardware and reduces CPU voltage; bus interface unit and APIC are kept running at full speed. | Core 2 Duo and above (Intel only) |
| C3 | Sleep | Stops all CPU internal clocks | Pentium II, Athlon and above, but not on Core 2 Duo E4000 and E6000 |
| C3 | Deep Sleep | Stops all CPU internal and external clocks | Pentium II and above, but not on Core 2 Duo E4000 and E6000; Turion 64 |
| C3 | AltVID | Stops all CPU internal clocks and reduces CPU voltage | AMD Turion 64 |
| C4 | Deeper Sleep | Reduces CPU voltage | Pentium M and above, but not on Core 2 Duo E4000 and E6000 series; AMD Turion 64 |
| C4E/C5 | Enhanced Deeper Sleep | Reduces CPU voltage even more and turns off the memory cache | Core Solo, Core Duo and 45-nm mobile Core 2 Duo only |
| C6 | Deep Power Down | Reduces the CPU internal voltage to any value, including 0 V | 45-nm mobile Core 2 Duo only |
来源: http://www.hardwaresecrets.com/article/611
2 Responses to “CPU C-States”
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Time 2012年02月9日 at 10:49
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