Fedora 21 vs. Ubuntu 14.10 Laptop Power Use
Tests by Michael Larabel getting a rough look at power use on the same ASUS Zenbook under Fedora 21 and Ubuntu 14.10 Linux.


Fedora 21: 

	Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Intel 7 /C210, Network: Intel Centrino Advanced-N 6235

	OS: Fedora 21, Kernel: 3.17.4-301.fc21.x86_64 (x86_64), Desktop: GNOME Shell 3.14.2, Display Server: X Server 1.16.1, Display Driver: intel 2.99.916, OpenGL: 3.3 Mesa 10.3.3, Compiler: GCC 4.9.2 20141101, File-System: ext4, Screen Resolution: 1920x1080

Fedora 21 + Updates: 

	Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Intel 7 /C210, Network: Intel Centrino Advanced-N 6235

	OS: Fedora 21, Kernel: 3.17.7-300.fc21.x86_64 (x86_64), Desktop: GNOME Shell 3.14.3, Display Server: X Server 1.16.2.901 (1.16.3 RC 1), Display Driver: intel 2.99.916, OpenGL: 3.3 Mesa 10.4.1, Compiler: GCC 4.9.2 20141101, File-System: ext4, Screen Resolution: 1920x1080

Ubuntu 14.10: 

	Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Intel 7 /C210, Network: Intel Centrino Advanced-N 6235

	OS: Ubuntu 14.10, Kernel: 3.16.0-28-generic (x86_64), Desktop: Unity 7.3.1, Display Server: X Server 1.16.0, Display Driver: intel 2.99.914, OpenGL: 3.3 Mesa 10.3.0, Compiler: GCC 4.9.1, File-System: ext4, Screen Resolution: 1920x1080


C-Ray 1.1
Total Time
Seconds < Lower Is Better
Fedora 21 ........... 74.01 |==================================================
Fedora 21 + Updates . 74.24 |==================================================
Ubuntu 14.10 ........ 73.93 |==================================================


C-Ray 1.1
System Power Consumption Monitor
Milliwatts < Lower Is Better
Fedora 21 ........... MIN: 14222  AVG: 25766  MAX: 28208 
Fedora 21 + Updates . MIN: 14689  AVG: 26558  MAX: 29015 
Ubuntu 14.10 ........ MIN: 13460  AVG: 24158  MAX: 25877 


LAME MP3 Encoding 3.99.3
WAV To MP3
Seconds < Lower Is Better
Fedora 21 ........... 15.76 |=================================================
Fedora 21 + Updates . 15.74 |=================================================
Ubuntu 14.10 ........ 16.10 |==================================================


LAME MP3 Encoding 3.99.3
System Power Consumption Monitor
Milliwatts < Lower Is Better
Fedora 21 ........... MIN: 13727  AVG: 21193  MAX: 26077 
Fedora 21 + Updates . MIN: 14023  AVG: 21398  MAX: 24501 
Ubuntu 14.10 ........ MIN: 13312  AVG: 19643  MAX: 21985 


Timed Idle
System Power Consumption Monitor
Milliwatts < Lower Is Better
Fedora 21 ........... MIN: 5710   AVG: 14834  MAX: 19084 
Fedora 21 + Updates . MIN: 13667  AVG: 15422  MAX: 23872 
Ubuntu 14.10 ........ MIN: 12905  AVG: 14719  MAX: 28282 


System Power Consumption Monitor
Phoronix Test Suite System Monitoring
Milliwatts
Fedora 21 ........... MIN: 5710   AVG: 20854  MAX: 28208 
Fedora 21 + Updates . MIN: 13667  AVG: 21361  MAX: 29015 
Ubuntu 14.10 ........ MIN: 12905  AVG: 19710  MAX: 28282