olti

|PSU type|USB voltage|USB current|1.5V|3.3V|5V idle|5V with USB cam| |Raspberry|5.25 V|250-300 mA|1.51 V|3.34 V|4.88 V|4.80 V| |Smartphone|5.1 V|250-300 mA|1.51 V|3.34 V|4.70 V|4.60 V| |Router (to PIN1+2)|-|-|1.52 V|3.34 V|4.90 V|4.85 V| Unfortunately I have no equipment for further testing.

OK, maybe I was a little bit too fast yesterday... Tested another 2 power supplies, cpu is 10-15°C cooler now. Checked voltage, the new ones (from my raspberry) deliver 5.25V, the old (from my tablet/smartphone) 5.1V. So there seems to be an impact of the power supply on the cpu temp.

Hi, 1st OPi Zero (512 MB, heatsink, no case, capped to 768 MHz, room temp 15°C, 2A power supply via USB, ARMBIAN 5.25 stable Debian GNU/Linux 8 (jessie) 3.4.113-sun8i): 20:06:21: 240MHz 0.06 1% 0% 0% 0% 0% 0% 64°C 20:06:26: 240MHz 0.06 1% 0% 0% 0% 0% 0% 63°C 20:06:31: 240MHz 0.05 2% 1% 0% 0% 0% 0% 64°C 2nd OPi Zero (256 MB, no heatsink, no case, capped to 768 MHz, room temp 10°C, 1.5A power supply via pin1+2, ARMBIAN 5.25 stable Debian GNU/Linux 8 (jessie) 3.4.113-sun8i): 20:05:35: 240MHz 0.17 2% 1% 0% 0% 0% 0% 60°C 20:05:40: 240MHz 0.16 1% 1% 0% 0% 0% 0% 60°C 20:05:45: 240MHz 0.14 1% 1% 0% 0% 0% 0% 61°C So there seems to be no effect of power supply. However, it runs 50°C over room temp on idle... I wonder what will happen in the summer To compare: OPi One, heatsink, case, room temp 15 °C, ARMBIAN 5.25 stable Debian GNU/Linux 8 (jessie) 3.4.113-sun8i: 20:11:09: 1008MHz 0.34 3% 0% 3% 0% 0% 0% 34°C 20:11:15: 1008MHz 0.40 4% 0% 3% 0% 0% 0% 35°C 20:11:20: 240MHz 0.37 4% 0% 3% 0% 0% 0% 35°C