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Add H64 power consumption info

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Gauthier Provost 2020-06-06 18:58:59 +08:00
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docs/helios64/hardware.md
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@ -51,6 +51,45 @@ This block diagram is cited from the RK3399 website documentation. [1](http://op
| SW2 | [Recovery Button](/helios64/button/#recovery-button) | Push Button | Recovery Button |
| SW3 | [Reset Button](/helios64/button/#reset-button) | Push Button | Reset Button |
## Power Management
## Power Consumption
Coming Soon.
**Board only**
| State | DC measured<br>power consumption | AC calculated<br>power consumption | Remarks |
|---|---|---|---|
| Idle | 5.4 W | 6.2 W | |
| CPU Load | 10.8 W | 12.4 W | stress-ng (all cores) |
**Full Kit (with 5x HDDs)**
| State | DC measured<br>power consumption | AC calculated<br>power consumption | Remarks |
|---|---|---|---|
| Idle | 25.2 W | 29 W | |
| CPU Load | 31.2 W | 35.9 W | stress-ng (all cores) |
| HDD Read | 36 W | 41.4 W | dd read (no caching) from RAID6 array|
| HDD Write | 34.8 W | 40 W | dd write (no caching) to RAID6 array |
| Network Access | 33.6 W | 38.6 W | HTTP download from RAID6 array |
| Stress Test | 40.8 W | 47 W | stress-ng (all cores) + fio (all disks) + iperf |
!!! note
Measures were done using a Current Clamp Meter on the Helios64 12V DC input. AC Power consumption is calculated based on a AC/DC conversion efficiency of 85%.
* Meter tool : Extech 380942 - 30A True RMS AC/DC Mini Clamp
* AC/DC Adapter : 12V 10A (efficiency : 85%)
* HDD: 5x Toshiba P300 1TB (HDWD110) configured as RAID6
* Network : Connected at 2500Mb/s
* Fan : Medium speed (PWM 100)
* Battery : Charge status 100%
* OS: Armbian Ubuntu (Bionic) Linux 4.4.213-rk3399
**Power consumption depends a lot on the HDDs brand and model used.**
## HDD Recommendation
We recommend HDD which are designed for NAS (Network Attached Storage). Those NAS HDD are specially conceived for reliable 24/7 operation and offers lower power consumption and dissipation, less vibration and noise, and finally better warranty. We recommend the following brands / families :
* **Western Digital** : WD Red NAS
* **Seagate** : IronWolf NAS
* **HGST** : Deskstar NAS
* **Toshiba** : NAS N300