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Revision as of 14:14, 20 May 2013

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!align="right"|avoid_pwm_pll

!align="right"|avoid_pwm_pll

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| Unlink core_freq from the rest of the gpu. Can cause low quality analog audio, which should be fixed with latest firmware. Default 0

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| 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

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!align="right"|sdram_freq  

!align="right"|sdram_freq  

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!align="right"|over_voltage  

!align="right"|over_voltage  

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| ARM/GPU core voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. force_turbo will allow values higher than 6. Default 0 (1.2V) <ref name=voltages>What this means is that you can specify -16 and expect about 0.8V as the GPU/core voltage. This is 0.4V below the normal value of 1.2. If you specify 16, you'd get 0.4V ABOVE the normal value of 1.2V, or 1.6V. The fact that someone carefully specified "8" and "1.4V" as the upper limit in the examples leads me to think that it is likely to shorten the life of your raspberry pi significantly if you would specify values above "8".  So: don't specify values above zero, but if you do, don't go above 8.</ref>

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| ARM/GPU core voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. <ref name=voltages>What this means is that you can specify -16 and get 0.8V as the GPU/core voltage, and specify 8 and get 1.4V</ref> Default is 0 (1.2V). Values above 6 are only allowed when force_turbo or current_limit_override are specified (which set the warranty bit)

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!align="right"|over_voltage_sdram  

!align="right"|over_voltage_sdram  

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!align="right"|force_turbo

!align="right"|force_turbo

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| Disables dynamic cpufreq driver and minimum settings below. Enables h264/v3d/isp overclock options. Default 0

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| Disables dynamic cpufreq driver and minimum settings below. Enables h264/v3d/isp overclock options. Default 0. May set warranty bit.

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!align="right"|initial_turbo

!align="right"|initial_turbo

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!align="right"| current_limit_override

!align="right"| current_limit_override

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| Disables SMPS current limit protection when set to "0x5A000020". Can help if you are currently hitting a reboot failure when overclocking too high. <ref name=current_limit_override>http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=6201&start=325#p170793</ref>

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| Disables SMPS current limit protection when set to "0x5A000020". Can help if you are currently hitting a reboot failure when overclocking too high. May set warrany bit.<ref name=current_limit_override>http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=6201&start=325#p170793</ref>

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eLinux.org - Changes related to "RPi Overclocking" [en]

RPiconfig