====== How to Overclock ODROID-C1 ======

<WRAP center round important>
  * Ubuntu : The version should be 3.10.104-177 or higher version.
  * Android : The version should be Android v3.4 (Nov 28,2016) or higher version.
</WRAP>

==== The available list of cpu frequency set ====

|  frequency  |  notation on boot.ini  |  clock spec.  |
|  1.824 GHz  |  "1824"  |  overclock  |
|  1.728 GHz  |  "1728"  |  overclock  |
|  1.632 GHz  |  "1632"  |  overclock  |
|  1.536 GHz  |  "1536"  |    spec in  |
|  1.488 GHz  |  "1488"  |    spec in  |
|  ...  |  ...  |  ...  |

You can check the available frequency set with the following node.

<code>
# cat  /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequency

96000 192000 312000 408000 504000 600000 696000 816000 912000 1008000 1104000 1200000 1296000 1416000
1488000 1536000 1632000 1728000 1824000
</code>

<WRAP left round tip 80%>
In case of **Android**, we don't recommend **1.824GHz** cpu frequency on Android system so far\\
because system booting and heavy load test with 1.824GHz is unstable currently.
</WRAP>

==== Adjust CPU Max Frequency using boot.ini ====

== How to Set boot.ini ==
Please modify **max_freq** based on the aforementioned frequency table. The unit of max_freq in boot.ini in MHz.
<code>
### boot.ini

# CPU Max Frequency
# Possible Values: 96 192 312 408 504 600 720 816
# 1008 1200 1320 1488 1536 1632 1728 and 1824
# setenv max_freq "1488"
# setenv max_freq "1536"
# setenv max_freq "1632"
# setenv max_freq "1728"
# setenv max_freq "1824"
setenv max_freq "1536"

# Boot Arguments
setenv bootargs "root=UUID=e139ce78-9841-40fe-8823-96a304a09859 rootwait ro ${condev} no_console_suspend vdaccfg=0xa000 logo=osd1,loaded,0x7900000,720p,full dmfc=3
cvbsmode=576cvbs hdmimode=${m} m_bpp=${m_bpp} vout=${vout_mode} ${disableuhs} ${hdmi_hpd} ${hdmi_cec} ${enabledac} monitor_onoff=${monitor_onoff} max_freq=${max_freq}"
</code>

== How to Check new max cpu frequency ==
You can check if the current max cpu frequency via the below node.
<code>
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
1824000
</code>

The node **cpuinfo_cur_freq** shows the cpu frequency that is currently working. \\
Please note governor policy should be **performance** if you want to check the max cpu frequency and run max cpu frequency unconditionally.
<code>
# echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 
performance
# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq 
1824000
</code>