Actual power usage of a SG-5100

randombits

I was wondering what the actual power usage of the SG-5100 ? I know in the spec it says 7 watts idle but I wondered how true this is, and what the 'normal' running wattage usage is.

stephenw10

Measured at the input to the PSU using a plug-in style power meter that isn't calibrated. Also at 240V though most modern switching power supplies should not really be affected much. But including power supply losses which are significant at low loads:

14W at boot.
12W at mostly idle (with Speedstep enabled):

last pid: 22486;  load averages:  0.27,  0.17,  0.09                                                                up 0+00:11:16  22:17:34
272 processes: 5 running, 204 sleeping, 63 waiting
CPU:  0.0% user,  0.0% nice,  0.1% system,  0.0% interrupt, 99.9% idle
Mem: 109M Active, 62M Inact, 286M Wired, 44M Buf, 3403M Free
Swap: 1527M Total, 1527M Free

  PID USERNAME   PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
   11 root       155 ki31     0K    64K RUN     3  11:06 100.00% [idle{idle: cpu3}]
   11 root       155 ki31     0K    64K CPU1    1  11:04 100.00% [idle{idle: cpu1}]
   11 root       155 ki31     0K    64K CPU2    2  11:02  99.75% [idle{idle: cpu2}]
   11 root       155 ki31     0K    64K CPU0    0  11:03  99.73% [idle{idle: cpu0}]
    0 root       -92    -     0K   832K -       0   0:01   0.23% [kernel{dummynet}]
22486 root        20    0  9860K  4872K CPU3    3   0:00   0.19% top -aSH
   12 root       -60    -     0K  1008K WAIT    2   0:01   0.15% [intr{swi4: clock (0)}]
   20 root       -16    -     0K    16K -       1   0:00   0.03% [rand_harvestq]

16W at 100% load:

last pid: 55206;  load averages:  2.20,  0.68,  0.28                                                                up 0+00:12:36  22:18:54
276 processes: 9 running, 204 sleeping, 63 waiting
CPU: 12.9% user,  0.0% nice, 87.1% system,  0.0% interrupt,  0.0% idle
Mem: 110M Active, 62M Inact, 287M Wired, 44M Buf, 3402M Free
Swap: 1527M Total, 1527M Free

  PID USERNAME   PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
23595 root       102    0  4144K  1948K CPU0    0   0:37  99.85% yes
46167 root       102    0  4144K  1952K RUN     2   0:36  99.83% yes
45970 root       102    0  4144K  1952K CPU3    3   0:36  99.59% yes
39779 root       102    0  4144K  1952K CPU1    1   0:37  99.44% yes
    0 root       -92    -     0K   832K -       0   0:01   0.13% [kernel{dummynet}]
   12 root       -60    -     0K  1008K WAIT    3   0:01   0.12% [intr{swi4: clock (0)}]
48218 root        20    0  9860K  4932K CPU2    2   0:00   0.08% top -aSH
   20 root       -16    -     0K    16K -       3   0:00   0.03% [rand_harvestq]
   19 root       -16    -     0K    16K pftm    2   0:00   0.01% [pf purge]

Hope that helps some.

Steve

randombits

Yes, Thank you, lower than my current setup which uses 26-35 watts. (I'm in the UK)