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>old CPUs that consume ~100W Sandy Bridge consumes that much at full load, but that can also be said of current gen processors (which incidentally usually go e

>old CPUs that consume ~100W Sandy Bridge consumes that much at full load, but that can also be said of current gen processors (which incidentally usually go even higher). At idle or low load, Sandy Bridge is plenty economical just sipping power. These aren't Pentium 4s which guzzle power like it's draining Texas of its all its oil even at idle. My Sandy Bridge i7 2700K is sipping 10W at idle/low load right now, and that's actually lower than my Alder Lake i7 12700K that's sipping 15W at idle/low load. At high loads they go up to 95W and 150W respectively, which still comes out in favor of Sandy Bridge.

FirmwareBurner 3y ago
>At idle or low load, Sandy Bridge is plenty economical just sipping power. "Sipping power" is a bit of an overstatement. Sure, at 35W idle, they were very lower for the time but modern <10nm monolithic die CPUs are way more economically than the older 32nm, 22nm, and 14nm CPUs though. That can't be argued. A 12th Gen quad core NUC CPU will use at full load what Sandy Bridge quad core uses at idle, while also getting better performance. There's just no comparison.
- vel0city 3y ago
  I've got an Ivy Bridge quad core system in my closet that my UPS states is currently using ~15W of power with a few HDDs in it and an extra NIC as well. 35W idle CPU usage is thoroughly incorrect.
- SomeRndName11 3y ago
  Where do you get this number 35W from? My Ivy Bridge 3470 idles at 7 watt (cpu only). Most of energy is consumed by the monitor anyway (20-25 Watt) anyway, so the energy savings are minuscule.
  - FirmwareBurner 3y ago
    >Where do you get this number 35W from? A google search on benchmarks and tests.
    - SomeRndName11 3y ago
      I actually measured the whole system. With motherboard, HDD, SSD and RAM it idled at 30W. CPU took only 7w from all of that.
      - FirmwareBurner 3y ago
        How did you measure CPU draw?
        SomeRndName11 3y ago
        Reported by the motherboard's current sensor.
        FirmwareBurner 3y ago
        Is that accurate?
        Dalewyn 3y ago
        CPU and mobo sensors are accurate enough for casual measurements and conversations like this. The numbers I cited earlier were reported by the CPU's package power sensors which were in turn read by LibreHardwareMonitor.
        SomeRndName11 3y ago
        Well if you count expected power consumption of each component and limited efficiency of the power supply, plus reports of people idling their 3470 based machines at 12w (full system) yeah, good enough. I mean what is your point? The 35W idle for Ivy Bridge CPU only is a ridiculous claim, that should be retracted IMO.
        squeaky-clean 3y ago
        (Not the same commenter) HWInfo64 can report your CPU power consumption. Some digital power supplies can also give power for specific parts, like corsair iCue compatible PSU's
- windowsrookie 3y ago
  Yes, at full load a 12th gen NUC will be more efficient. But if you're just using the old system as a home server, most the time the CPU is idling and not consuming much more power than a new NUC. Also an old system is likely in a case that accepts multiple drives. That NUC is not going to have space for my 3.5" storage drives. Yes I could invest in NVME SSD's, but the point of this is low cost and using parts I already have. I have 10+ old 3.5" HDD's laying around, if one dies I can easily swap it out at zero cost to me and keep my home server going.
  - FirmwareBurner 3y ago
    >That NUC is not going to have space for my 3.5" storage drives. We were just comparing CPU power usage. We're going off-road here and splitting hairs trying to cater to the needs of every enthusiast who builds his custom home lab. Nobody's telling you how you should build your NAS or home lab, but the point about big differences in CPU power consumption across >10 years of progress still stands.
whalesalad 3y ago
I disabled c states on my 13900K because it was chirping/squealing at low idle which irks me. Was hoping for that modern low tdp idle.
- SomeRndName11 3y ago
  Chirping?
  - Arrath 3y ago
    Coil whine, if I had to guess.

FirmwareBurner 3y ago

>At idle or low load, Sandy Bridge is plenty economical just sipping power. "Sipping power" is a bit of an overstatement. Sure, at 35W idle, they were very lower for the time but modern <10nm monolithic die CPUs are way more economically than the older 32nm, 22nm, and 14nm CPUs though. That can't be argued. A 12th Gen quad core NUC CPU will use at full load what Sandy Bridge quad core uses at idle, while also getting better performance. There's just no comparison.

vel0city 3y ago
I've got an Ivy Bridge quad core system in my closet that my UPS states is currently using ~15W of power with a few HDDs in it and an extra NIC as well. 35W idle CPU usage is thoroughly incorrect.
SomeRndName11 3y ago
Where do you get this number 35W from? My Ivy Bridge 3470 idles at 7 watt (cpu only). Most of energy is consumed by the monitor anyway (20-25 Watt) anyway, so the energy savings are minuscule.
- FirmwareBurner 3y ago
  >Where do you get this number 35W from? A google search on benchmarks and tests.
  - SomeRndName11 3y ago
    I actually measured the whole system. With motherboard, HDD, SSD and RAM it idled at 30W. CPU took only 7w from all of that.
    - FirmwareBurner 3y ago
      How did you measure CPU draw?
      - SomeRndName11 3y ago
        Reported by the motherboard's current sensor.
        FirmwareBurner 3y ago
        Is that accurate?
        Dalewyn 3y ago
        CPU and mobo sensors are accurate enough for casual measurements and conversations like this. The numbers I cited earlier were reported by the CPU's package power sensors which were in turn read by LibreHardwareMonitor.
        SomeRndName11 3y ago
        Well if you count expected power consumption of each component and limited efficiency of the power supply, plus reports of people idling their 3470 based machines at 12w (full system) yeah, good enough. I mean what is your point? The 35W idle for Ivy Bridge CPU only is a ridiculous claim, that should be retracted IMO.
      - squeaky-clean 3y ago
        (Not the same commenter) HWInfo64 can report your CPU power consumption. Some digital power supplies can also give power for specific parts, like corsair iCue compatible PSU's
windowsrookie 3y ago
Yes, at full load a 12th gen NUC will be more efficient. But if you're just using the old system as a home server, most the time the CPU is idling and not consuming much more power than a new NUC. Also an old system is likely in a case that accepts multiple drives. That NUC is not going to have space for my 3.5" storage drives. Yes I could invest in NVME SSD's, but the point of this is low cost and using parts I already have. I have 10+ old 3.5" HDD's laying around, if one dies I can easily swap it out at zero cost to me and keep my home server going.
- FirmwareBurner 3y ago
  >That NUC is not going to have space for my 3.5" storage drives. We were just comparing CPU power usage. We're going off-road here and splitting hairs trying to cater to the needs of every enthusiast who builds his custom home lab. Nobody's telling you how you should build your NAS or home lab, but the point about big differences in CPU power consumption across >10 years of progress still stands.

whalesalad 3y ago

I disabled c states on my 13900K because it was chirping/squealing at low idle which irks me. Was hoping for that modern low tdp idle.

SomeRndName11 3y ago
Chirping?
- Arrath 3y ago
  Coil whine, if I had to guess.