Just a short final update on this off-topic subject.... (executive summary: you're right, newer machine consumes half the power) On 10.10.22 19:21, Stefan Seyfried wrote:
On 09.10.22 20:14, Stefan Brüns wrote:
On Sonntag, 9. Oktober 2022 10:39:20 CEST Stefan Seyfried wrote:
When idling (which is is probably about 90% of the time), it draws about 30-35 Watts. Given the hardware in there (2x GBit ethernet, DVB-S2 card), there is not a huge part of the energy consumption that can be accounted to CPU / chipset.
When I measured my Haswell E3-1245 workstation some years ago, it measured at about 15W in idle. This is with a Supermicro workstation board (2x GBit, several PCIe + PCI) and at that time included 2x spinning rust, a SSD and a Soundblaster Audigy 2 (PCI). So probably about 15-20W to be saved.
OK, i did not really revisit this the last years. 15W total with 2 disks (usually 2 to 5W each, unless spun down, 2x gigabit links (1W each) and even more peripherals is really a nice number. I'm going to get an Esprimo P710 Core i3 3220 (AFAICT the last model year that still contains a PCI bus for my DVB-S2 card ;-) and do some measurements at that one. Should be of about the same age and perform similarly well (power consumption wise).
It went on to be an Esprimo P757, Core i3-6100@3.7GHz, the PCI socket is provided by a PCIE-to-PCI adapter card with an ASMedia 1085 bridge chip. The old machine in fact did draw about 40 watts (I measured pretty much exactly 9.6kWh / 10days). The new machine draws about 20-21 watts when idling, and even with all CPU's loaded I can't get it much above 40 watts. The only difference in the used hardware is, that the new machine had an m2.sata ssd with 256GB included and I'm using that one as a systems volume instead of the 500GB Samsung that was in the other one (and which was not even half used), maybe this saves some milliwatts? And I left off the second PCIE-1GBit NIC, as it was unused at the time anyway (thanks to a VLAN enabled switch I acquired some time ago). I doubt that the idling, non-connected NIC makes for a big difference in power but it is a difference.
It will be interesting to see the difference between the old Core2 duo machine (with all the non-essential hardware removed) and the new core i3 machine (before adding the additional disks and peripherals). I'll report back how much of a difference that makes.
The bare core i3 machine (no additional disks, ssds, SAT-TV card, ...) did draw about 10W with windows 10, a little bit more with tumbleweed, but I did not do any optimisation, the SATA ALPM would probably have saved that additional watt or so). I'll try to get the old machine running without much things connected, but I'd guess it will be about the same 10 watts difference that the additional hardware, so it will be around 25-30 watts.
I'll let me suprise how much the bare metal consumes and how much my additional peripherals draw.
Peripherals -> about 10 watts. So for my case of a 24/7 running machine it is certainly worth going from a 12 year old machine to a 5 year old, the cost of the machine will be paid via the energy bill in about 2 years. But that's of course no reason for dropping support for the old machine, because it will still be good for non-24/7-running jobs ;-) Have fun, -- Stefan Seyfried "For a successful technology, reality must take precedence over public relations, for nature cannot be fooled." -- Richard Feynman