raspberry pi 2- 오버클럭 옵션 관련

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]