Power Consumption

Now that we have all of these network appliances, how much is it going to cost me in power consumption and dollars?  The Brand Electronics Digital Power Meter can be used to measure power consumption of home appliances.  Here are some measurements on idle systems, etc., along with cost and efficiency calculations.  Cost in $/mo is figured at $0.11/kWh, kWmonth = $0.11*30*24 = $79.2, Wmonth = $0.0792.  Addendum: I recently received a dual range meter from Brand Electronics and plan to re-measure devices with single digit measurements and computers for peak watts.

Linux/Unix nbench - http://www.tux.org/~mayer/linux/bmark.html - my benchmarks -

Baseline (LINUX)    : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38
 
Item Watts Peak Watts On
/Standby
always on(+)		 $/mo nbench
MEM
INT
FP		 nbench
MEM/kW
INT/kW
FP/kW		 BogoMIPS BogoMIPS/W
Server fermata Asus A7M266 1GHz Athlon 1TB 480
255
 20.20
5.556
4.313
8.030
22
17
32
2011.95
8.05
App TV Monitor Sony PVM-2530 25"  
135
+0
10.70
0.00
        
Desktop nocturn Asus A7M266 1.13GHz Athlon   149 129 10.22
5.965
4.938
8.272
51
42
70
2260.99
19.16
Output Monitor Sony GDM-20D11 20" (SGI)  
108
4
8.55
0.32
        
Workstation aria SGI Indigo2 200MHz R4400   102 8.08
0.679
0.599
1.248
7
6
12
! 48.00
! 0.47
Output Monitor Samsung CFA7689L 17GLs 17"  
85
4
6.73
0.32
        
App Window Fan Lakewood 32-80812 12"  
H 78
M 62
L 51
6.18
4.91
4.04
        
Desktop APS M-Power PPC 604e 200MHz  
67
5.31
        
Desktop rhapsody Asus CUSL2 800MHz P3EB  
50
3.96
3.495
2.744
6.235
70
55
125
1605.63
32.11
App Receiver Sony STR-AV560  
34
+0
2.69
0.00
        
Netapp jukebox 266MHz Mobile Pentium 55 28.7
-Y 28.5
2.27
2.26
0.764
0.799
1.277
25
27
43
532.48
17.75
Netapp auto jukebox
233MHz NS/Cyrix GXm		 47 27.8
-Y 22.9		 2.20
1.81
0.327
0.405
0.401
23
29
29		 ! 63.28 ! 5.01
Netapp video endpoint 266MHz Mobile Pentium  
22
1.74
0.764
0.799
1.277
35
36
58
532.48
24.20
Net VPN Moat  
21
1.66
        
Laptop Apple Powerbook G3  
20
1.58
        
Input Scanner Microtek ScanMaker 4  
16
1.27
        
Netapp audio endpoint 233MHz NS/Cyrix GXm  
14
1.11
0.327
0.405
0.401
23
29
29
! 63.28
! 5.01
App VCR Proscan PSVR 65  
12
2
0.95
0.16
        
App Powered Speakers Cambridge DTT3500 5.1  
12
2
0.95
0.16
        
Net Switch Linksys EZXS88R 8-port 10/100BT  
12
0.95
        
Net Switch Asante FS4008P 8-port 10/100BT  
+11
0.87
        
Net Hub Netgear DS116 16-port 10/100BT  
+8
0.63
        
Input Scanner HP ScanJet 4c - warmup  
7
0.55
        
Netapp UCOMM 206MHz Strongarm   6 0.48    
194.15
32.36
App CD Player Sony CDP-C345  
5
0.40
        
App CC Deck Sony TC-WA7ES  
5
0.40
        
Net Cable Modem RCA DCM235  
+4
0.32
        
Net Hub Netgear EN116 16-port 10BT  
+4
0.32
        
Net Switch Netgear FS116 16-port 10/100BT  
4
0.32
        
App Digital Audio Player FlashPAC  
4
0.32
        
Handheld PC Sharp Mobilon Pro PV-5000  
2
0.16
        
Input KVM Switch Maxxtro CAS-421  
2
0.16
        
Net Modem Global Village A812 Teleport 33.6  
2
0.16
        
Net VPN Yorkie  
+2
0.16
        
Net Wireless Ethernet Adapter Proxim 7921  
+2
0.16
        
Output Printer HP Laserjet 5MP  
2
0.16
        
Net Print Server D-Link DP-101  
+1
0.08
        
Total gjm homenet/AV always on (+)  
32
2.53
        

 Comments:

I find that power strips with individual switches for each outlet are convenient.
Thanks to Steve Crandall for lending his Digital Power Meter!
NoBell Home - gjm - last update 8/24/2001