4 ms·

Chassis power consumption with system(s) off: Xeon: 0W OpenPOWER: 11W HP Moonshot (Avoton): 121W HP Moonshot (ARM): 218W This is mostly due to chassis spec

Chassis power consumption with system(s) off: Xeon: 0W OpenPOWER: 11W HP Moonshot (Avoton): 121W HP Moonshot (ARM): 218W This is mostly due to chassis specifics, though.

userbinator 12y ago
That is so amazingly high that I think something isn't right - I wonder what's consuming so much power. 100W+ is like a whole CPU at full load. Then again, servers are not usually turned off so perhaps they just kept all the CPUs powered up but in a halted state...
- Sanddancer 12y ago
  Most likely, it's everything else on the motherboard. Think things like the IPMI chipset, which tends to be on all the time. If the boards have SFP+ transceivers, those may very well use a few watts waiting for Wake on Lan packets. Certain SCSI controllers will have their own Out of Band management chips that use a few watts. Then you have a fan spinning slowly to keep the power supply cool for handling all those parts at idle. Servers tend to have lots of bits and pieces that like being on all the time, so even when shut down, the motherboard still tends to be a hive of activity.
- timthorn 12y ago
  Bear in mind that the Moonshot chassis also contains one or two, potentially 10GbE, switches.
  - lvalsan 12y ago
    The tested Intel Xeon E3-1285L v3 (Haswell) and the IBM Power 8 systems are single mainboard systems. The Intel C2750 (Avoton) and the ARM 64-bit Applied Micro X-Gene 1 are cartridges inside an HP Moonshot chassis. All tested systems are fitted with a BMC. In addition the HP Moonshot chassis also have an internal network switch, uplink module, internal network fabric, chassis fans, chassis manager module, etc. The Intel Avoton chassis is having a 1 GbE internal network fabric and switch with a 6x SFP+ 10 GbE uplink module (one port used) while the ARM 64-bit X-Gene 1 chassis is having a 10 GbE internal network fabric and switch with a 4x QSFP+ uplink module (one port used). The purpose of the off power measurements is to see how much power the chassis infrastructure is drawing. The power consumption of the Intel Xeon E3-1285L v3 (Haswell) chassis with the system off is very low, below the threshold of the Racktivity smart metered PDU used to perform the power measurements. The PDU reports 0, but the real power consumption is in the order of a few Watts. The tested Power 8 processor is inside a Tyan reference system GN70-BP010. Being a reference system, not all components and firmwares have been fully optimised. In the mean time Tyan has launched the TN71-BP012 platform which is not a reference system and should be much more optimised and ready for production use. I would be curious to see what are the improvements, but I don't have any at hand for now.
deleted 12y ago
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Chassis power consumption with system(s) off: Xeon: 0W OpenPOWER: 11W HP Moonshot (Avoton): 121W HP Moonshot (ARM): 218W This is mostly due to chassis specifics, though.

userbinator 12y ago

That is so amazingly high that I think something isn't right - I wonder what's consuming so much power. 100W+ is like a whole CPU at full load. Then again, servers are not usually turned off so perhaps they just kept all the CPUs powered up but in a halted state...

Sanddancer 12y ago
Most likely, it's everything else on the motherboard. Think things like the IPMI chipset, which tends to be on all the time. If the boards have SFP+ transceivers, those may very well use a few watts waiting for Wake on Lan packets. Certain SCSI controllers will have their own Out of Band management chips that use a few watts. Then you have a fan spinning slowly to keep the power supply cool for handling all those parts at idle. Servers tend to have lots of bits and pieces that like being on all the time, so even when shut down, the motherboard still tends to be a hive of activity.
timthorn 12y ago
Bear in mind that the Moonshot chassis also contains one or two, potentially 10GbE, switches.
- lvalsan 12y ago
  The tested Intel Xeon E3-1285L v3 (Haswell) and the IBM Power 8 systems are single mainboard systems. The Intel C2750 (Avoton) and the ARM 64-bit Applied Micro X-Gene 1 are cartridges inside an HP Moonshot chassis. All tested systems are fitted with a BMC. In addition the HP Moonshot chassis also have an internal network switch, uplink module, internal network fabric, chassis fans, chassis manager module, etc. The Intel Avoton chassis is having a 1 GbE internal network fabric and switch with a 6x SFP+ 10 GbE uplink module (one port used) while the ARM 64-bit X-Gene 1 chassis is having a 10 GbE internal network fabric and switch with a 4x QSFP+ uplink module (one port used). The purpose of the off power measurements is to see how much power the chassis infrastructure is drawing. The power consumption of the Intel Xeon E3-1285L v3 (Haswell) chassis with the system off is very low, below the threshold of the Racktivity smart metered PDU used to perform the power measurements. The PDU reports 0, but the real power consumption is in the order of a few Watts. The tested Power 8 processor is inside a Tyan reference system GN70-BP010. Being a reference system, not all components and firmwares have been fully optimised. In the mean time Tyan has launched the TN71-BP012 platform which is not a reference system and should be much more optimised and ready for production use. I would be curious to see what are the improvements, but I don't have any at hand for now.

deleted 12y ago

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