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en:xu4_ram_overclock [2017/05/23 11:49] joy.cho [Available list of devfreq governor and frequency] |
en:xu4_ram_overclock [2017/05/23 18:24] (current) joy.cho [Ubuntu Guide] |
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A new higher DDR frequency is now available on XU4 series.\\ | A new higher DDR frequency is now available on XU4 series.\\ | ||
- | So far, only **Android** supports the frequency set.\\ | + | Both of Android and Ubuntu supports the frequency set,\\ |
- | Also you can adjust DDR frequency and governor using a new **ODROID Utility**. | + | and only Android provides DRAM governor interface.\\ |
<WRAP center round important> | <WRAP center round important> | ||
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===== Android Guide ===== | ===== Android Guide ===== | ||
+ | On Android, you can adjust DDR frequency and governor using a new **ODROID Utility**. | ||
=== Governor === | === Governor === | ||
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===== Ubuntu Guide ===== | ===== Ubuntu Guide ===== | ||
+ | |||
+ | On kernel 4.9, you can change ddr frequency using boot.ini interface.\\ | ||
+ | The available frequency set is **933MHz, 825MHz, 728MHz and 633MHz**\\ | ||
+ | and the default one is **825MHz**.\\ | ||
+ | As we check the benchmark score using **mbw**, about 10% improvement can be expected. | ||
+ | === boot.ini === | ||
+ | Please find **ddr_freq** in boot.ini and change the value. | ||
+ | <code> | ||
+ | ... | ||
+ | # DRAM Frequency | ||
+ | # Sets the LPDDR3 memory frequency | ||
+ | # Supported values: 933 825 728 633 (MHZ) | ||
+ | setenv ddr_freq 825 | ||
+ | ... | ||
+ | # set DDR frequency | ||
+ | dmc ${ddr_freq} | ||
+ | ... | ||
+ | </code> | ||
+ | And then please make sure to reboot the system. | ||
+ | <code> | ||
+ | # sudo reboot | ||
+ | </code> | ||
+ | |||
+ | |||
===== AnTuTu Benchmark Score ===== | ===== AnTuTu Benchmark Score ===== | ||