万博网页版登陆页派/Raspberry Pi 超频的方法

发表于 2012-8-1 17:47:30 | 显示全部楼层 |阅读模式

记得在raspberry pi官网曾看到过，万博网页版登陆页派可以有小幅度超频可能。

进终端然后：
sudo nano /boot/config.txt
最简单的方法是将“arm_freq”的值改成“900”并加上“sdram_freq=500”。
一步秒杀，十分轻松。
详细的选项参数可参考elinux.org上的PRi config.txt Overclocking configuration：[blockquote]

[li]arm_freq：ARM处理器的频率，单位是*MHz*。默认值是 *700*。[/li][li]gpu_freq：Sets core_freq, h264_freq, isp_freq, v3d_freq together.[/li][li]core_freq：GPU核心频率，单位是*MHz*。当它驱动 L2 缓存时影响ARM的运行效率。默认值是 *250*。[/li][li]h264_freq：硬件视频模块，单位是*MHz*。默认值是 *250*。[/li][li]isp_freq：图像传感器管道，单位是*MHz*。默认值是 *250*。[/li][li]v3d_freq：3D模块，单位是*MHz*。默认值是 *250*。[/li][li]sdram_freq：内存，单位是*MHz*。默认值是 *400*。[/li][li]over_voltage：ARM/GPU 电压调整。 [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[/li][li]over_voltage_sdram：Sets over_voltage_sdram_c, over_voltage_sdram_i, over_voltage_sdram_p together[/li][li]over_voltage_sdram_c：SDRAM controller voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[/li][li]over_voltage_sdram_i：SDRAM I/O voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[/li][li]over_voltage_sdram_p：SDRAM phy voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[/li]

[/blockquote]
以上Raspberry Pi超频选项清单主要部分已经按照我的理解给出中文解释。最重要的两个选项应该就是 arm_freq 和 sdram_freq 。
电压部分请参考以下英文解释：[blockquote]
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.[/blockquote]
如果Raspberry Pi超频设置错误，解决的方法应该是用其他电脑读取SD卡将“/boot/config.txt”修改成合适的值。
不过机子不在手上，我还没有对Raspberry Pi超频进行实验。
好久没有碰Raspberry Pi了，之前的一个想法关于“武装”它的想法一直等待时间实现，可是它在我老家，希望下次能淘到一些有用的零配件，比如移动电源