mam v /boot/config.txt na rpi1 toto:
arm_freq=1000
gpu_mem=128 #kamera potrebuje minimum 128
core_freq=250
init_emmc_clock=425000000 #pozor, rozbiji sd, potreba asi jen kvuli core_freq_min<200
sdram_freq=550
over_voltage=6
force_turbo=1
#spodni hranice, underclock
arm_freq_min=300
core_freq_min=100
sdram_freq_min=300
over_voltage_min=-2
avoid_pwm_pll=1
emmc_pll_core=1
#pro camera
start_file=start_x.elf
fixup_file=fixup_x.dat
start_x=1
disable_camera_led=1
#pozor, rusi zaruku, ale pomaha pretaktovat
current_limit_override=0x5A000020
aktualni rychlosti vypises:
for src in arm core h264 isp v3d uart pwm emmc pixel vec hdmi dpi
do
echo "$src:\t$(vcgencmd measure_clock $src)"
done
a nejvic rpi1 zahrival memtester, treba
sudo memtester 256M