| 13 Mar 2026 |
 Stas | I need to put a power meter on it, to see how much power it guzzles. Exhaust is not as hot as I expected, though | 14:17:15 |
 Artemis Tosini (NixOS) | I suppose that's what happens on old machines, a full FreeBSD bootstrap to stdenv takes only a few hours on my VM | 14:24:07 |
 Puna | dunno how accurate this is, but apparently the windfarm module exposes current & voltage data of the cpus
https://github.com/techflashYT/g5-power-draw-linux | 14:25:07 |
| Puna | puna@Yubel ~> ./g5-power-draw.sh
Your PowerMac G5's CPUs are currently drawing: 226.088W
Calculated using the following equation: ((5.358 + 4.663) * 12) + (45.532 * 1.247) + (39.184 * 1.252)
| 14:25:28 |
| Puna | which checks out compared to this blob post where someone put an external watt-meter on their g5
https://lowendmac.com/2025/so-how-much-power-does-a-power-mac-g5-really-use/ | 14:26:37 |
| Puna | * puna@Yubel ~> ./g5-power-draw.sh
Your PowerMac G5's CPUs are currently drawing: 226.088W
Calculated using the following equation: ((5.358 + 4.663) * 12) + (45.532 * 1.247) + (39.184 * 1.252)
building protobuf-c with 2/2 cores rn
| 14:27:11 |
| Puna | * puna@Yubel ~> ./g5-power-draw.sh
Your PowerMac G5's CPUs are currently drawing: 226.088W
Calculated using the following equation: ((5.358 + 4.663) * 12) + (45.532 * 1.247) + (39.184 * 1.252)
building protobufc with 2/2 cores rn
| 14:27:24 |
| Puna | "blob post" lol, blog* | 14:46:38 |
| Stas | interesting | 14:55:57 |
| Stas | my winndfarm.0 device does not have 12v surrent sensor devices | 14:56:13 |
| Stas | * my windfarm.0 device does not have 12v current sensor devices | 14:58:20 |
| Stas | root@macg5:~# ls -la /sys/devices/platform/windfarm.0/
total 0
drwxr-xr-x 3 root root 0 Mar 13 15:58 .
drwxr-xr-x 13 root root 0 Jan 1 2000 ..
-rw-r--r-- 1 root root 4096 Mar 13 15:58 backside-fan
-r--r--r-- 1 root root 4096 Mar 13 15:58 backside-temp
-r--r--r-- 1 root root 4096 Mar 13 15:54 cpu-current-0
-r--r--r-- 1 root root 4096 Mar 13 15:54 cpu-current-1
-rw-r--r-- 1 root root 4096 Mar 13 15:58 cpu-front-fan-0
-rw-r--r-- 1 root root 4096 Mar 13 15:58 cpu-front-fan-1
-r--r--r-- 1 root root 4096 Mar 13 15:58 cpu-power-0
-r--r--r-- 1 root root 4096 Mar 13 15:58 cpu-power-1
-rw-r--r-- 1 root root 4096 Mar 13 15:58 cpu-rear-fan-0
-rw-r--r-- 1 root root 4096 Mar 13 15:58 cpu-rear-fan-1
-r--r--r-- 1 root root 4096 Mar 13 15:58 cpu-temp-0
-r--r--r-- 1 root root 4096 Mar 13 15:58 cpu-temp-1
-r--r--r-- 1 root root 4096 Mar 13 15:54 cpu-voltage-0
-r--r--r-- 1 root root 4096 Mar 13 15:54 cpu-voltage-1
-rw-r--r-- 1 root root 4096 Mar 13 15:58 cpufreq-clamp
-rw-r--r-- 1 root root 4096 Mar 13 15:58 drive-bay-fan
lrwxrwxrwx 1 root root 0 Mar 13 15:58 driver -> ../../../bus/platform/drivers/windfarm
-rw-r--r-- 1 root root 4096 Mar 13 15:58 driver_override
-r--r--r-- 1 root root 4096 Mar 13 15:58 hd-temp
-r--r--r-- 1 root root 4096 Mar 13 15:58 modalias
drwxr-xr-x 2 root root 0 Mar 13 15:58 power
-rw-r--r-- 1 root root 4096 Mar 13 15:58 slots-fan
-r--r--r-- 1 root root 4096 Mar 13 15:58 slots-power
lrwxrwxrwx 1 root root 0 Mar 13 09:37 subsystem -> ../../../bus/platform
-rw-r--r-- 1 root root 4096 Jan 1 2000 uevent
| 14:59:01 |
| Puna | available things in there depend on the machine model i think… i don't have cpu-power-* on my end, maybe that has smth useful? | 15:47:25 |
| Puna | * available things in there depend on the machine model i think, there's abunch of different windfarm submodules for handling the differences there… i don't have cpu-power-* on my end, maybe that has smth useful? | 15:48:44 |
| Stas | I will investigate it for sure. | 15:52:39 |
| 23 May 2021 |
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