전에 찍어 올렸던 사진인데..
overvolt 라는 내용이 있는데..
내용으로 봐서는
[-16,8] equates to [0.8 V,1.4 V] with 0.025 V steps.
+8 은 1.4V를 CPU/RAM에 인가한다는 의미이고
기본값은 0 / 1.2V 인 것으로 보인다.
즉, 입력 전압은 5V로 고정되어도 상관없다는 의미.
(전류만 넉넉하다면야)
그리고 GPU에는 전원공급이 없는 이유로는 SoC 니까 CPU에 내장되어서!
Overclocking options
| Option | Description |
|---|---|
| arm_freq | Frequency of ARM in MHz. Default 700 |
| gpu_freq | Sets core_freq, h264_freq, isp_freq, v3d_freq together. Default 250 |
| core_freq | Frequency of GPU processor core in MHz. It has an impact on ARM performance since it drives L2 cache. Default 250 |
| h264_freq | Frequency of hardware video block in MHz. Default 250 |
| isp_freq | Frequency of image sensor pipeline block in MHz. Default 250 |
| v3d_freq | Frequency of 3D block in MHz. Default 250 |
| avoid_pwm_pll | Don't dedicate a pll to PWM audio. This will reduce analogue audio quality slightly. The spare PLL allows the core_freq to be set independently from the rest of the gpu allowing more control over overclocking. Default 0 |
| sdram_freq | Frequency of SDRAM in MHz. Default 400 |
| over_voltage | ARM/GPU core voltage adjust. [-16,8] equates to [0.8 V,1.4 V] with 0.025 V steps. [5] Default is 0 (1.2 V). Values above 6 are only allowed when force_turbo or current_limit_override are specified (which set the warranty bit). |
| over_voltage_sdram | Sets over_voltage_sdram_c, over_voltage_sdram_i, over_voltage_sdram_p together |
| over_voltage_sdram_c | SDRAM controller voltage adjust. [-16,8] equates to [0.8 V,1.4 V] with 0.025 V steps. Default 0 (1.2 V) [5] |
| over_voltage_sdram_i | SDRAM I/O voltage adjust. [-16,8] equates to [0.8 V,1.4 V] with 0.025 V steps. Default 0 (1.2 V)[5] |
| over_voltage_sdram_p | SDRAM phy voltage adjust. [-16,8] equates to [0.8 V,1.4 V] with 0.025 V steps. Default 0 (1.2 V)[5] |
| force_turbo | Disables dynamic cpufreq driver and minimum settings below. Enables H.264/V3D/ISP overclock options. Default 0. May set warranty bit. |
| initial_turbo | Enables turbo mode from boot for the given value in seconds (up to 60) or until cpufreq sets a frequency. Default 0 [6] |
| arm_freq_min | Minimum value of arm_freq used for dynamic clocking. Default 700 |
| core_freq_min | Minimum value of core_freq used for dynamic clocking. Default 250 |
| sdram_freq_min | Minimum value of sdram_freq used for dynamic clocking. Default 400 |
| over_voltage_min | Minimum value of over_voltage used for dynamic clocking. Default 0 |
| temp_limit | Overheat protection. Sets clocks and voltages to default when the SoC reaches this Celsius value. Setting this higher than default voids warranty. Default 85 |
| current_limit_override | This is enabled by default.[7] |
[링크 : http://elinux.org/RPiconfig]
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