Hooked up my age-old Kill-a-Watt. Here's some accurate numbers for everyone, since I never trust these Supermicro PDCs.
Setup:
- Supermicro 1U Chassis that the X19SLH-LN6TF comes in, stock PWS-341P-1H 340W PSU
- E3-1270V3, passive heatsink, 32 GB DDR3-1600Mhz
- Standard 4 counter-routing fans (the two dummies are empty, as usual for this chassis)
- 79F ambient temp
- No HDDs, no SATADOM, No PCIe card in Riser (Riser present though)
- No RJ45 cables connected, not even IPMI
- Supermicro TPM Module installed
- BIOS Reset to Optimum Defaults (default power savings settings)
- BMC Enabled
- Dell 1000W rack UPS, load output stable @ 115 VAC
The X540 nics were hardware disable/powered-off using the JPL1/JPL2/JPL3 jumpers during those test runs.
I chose Ubuntu installer as the default Linux kernel has reasonable C state power savings where as FreeBSD (pfSense) does not out of the box (need a package). However, they could be optimized further on both OS.
IPMI Plugged in, system powered off:
- Spikes to 25 W (BMC booting?)
- 10.0 W idle
- 13 W with Link/Cable
All 3 x X540 NICs enabled:
- First boot/waiting on BMC: 75.8 W
- BIOS Tests: 93.4 W
- Post-Boot, Fans Calm Down, idle Built-in EFI Shell: 72.1 W (dips to 66.7 W at times) for 5 minutes
- Boot to Ubuntu 21.04 Installer: 64.1 W - 71 W for 5 minutes
Just 1 x X540 NIC enabled:
- First boot/waiting on BMC: 70.8
- BIOS Tests: 89.9 W
- Post-Boot, Fans Calm Down, idle Built-in EFI Shell: 65.4 W (dips to 62.9 W at times) for 5 minutes
- Boot to Ubuntu 21.04 Installer: 59.9 W - 62.9 W for 5 minutes
All 3 x X540 NICs disabled:
- First boot/waiting on BMC: 68.2 W
- BIOS Tests: 86.7 W
- Post-Boot, Fans Calm Down, idle Built-in EFI Shell: 61.2 W (dips to 60.5 W at times) for 5 minutes
- Boot to Ubuntu 21.04 Installer: 57.0 W - 60.5 W for 5 minutes
There were various spikes, like waiting on the BMC it spikes 3-5W higher at times. Also, booting all 3 x X540 nics hit over 105 W sometimes during Ubuntu's boot sequence.
Correction: Updated BMC idle with power off, as with a link it idles at 13 W all the time.