White noise level at my house is around 37dBA without the force air furnace kicking in. The "air-dryer" trick doesn't work on Seasonic smart fan electronics. Without the 60mm fan running, it idles at 38.7 dBA. The camera auto focus lens movement could easily move the reading to 42 dBA at the distance. One thing for sure, 120mm fan or not, when the temp goes up a 120mm fan turning at over 1,200 rpm will not be totally silent.
Seasonic PowerAngel for measuring wattage and power factor.
Lazyman’s Test Setup
|Case and Cooling ||Sonata II:|
- 120 mm exhaust
|CPU ||AMD Opteron 165 @2.75 Ghz, 1.375vcore|
|Motherboard ||DFI LanParty UT Ultra D (2x40mm fan added over PWM)|
|Memory ||GSKill PC4400 2x512Mb|
|Other ||DVD R/W7600GTWD 120GB SATA HDDLeadtek XP2000 DeluxeXP Pro SP2 + latest updates|
Sears 82028 Autoranging Multimeter with external temp probe
CEM DT8850 digital sound meter with built in calibration
Installing the M-12 went smoothly. Modular cable makes it easier as I did not have to deal with the bundle of wirings at the beginning. Unlike others, M-12 connections to the back of the PSU have locking lug preventing accidental disconnects.
The voltage rails were surprisingly stable with little or no jitters at all.
I could not believe the wattage measured by Seasonic Power Angel, as they were too low to be true. My suspicious mind prompted to retest using the Kamariki PSU from Scythe just to make sure. A note of clarification- The Kamariki wattage came from my second machine; Opteron 165 @2.60 Ghz, 1.475 Vcore and 7900GS. I merely wanted to verify the efficiency factor and the working condition of Power Angel.
Scythe Kamariki 550 using second test rig: Opty 165 @2.6 1.475 Vcore, 7900GS
S-12 500 using the second rig stated above for apple to apple comparison. This shows S-12 has 20 watts lower power consumption than Kamariki while Power Factors were 95 to 75
Seasonic M-12 using the test rig stated at the beginning - Opteron 165 @2.75 1.375 Vcore, 7600GT
While I have had used the same setup with previous power supply reviews showing different wattages from one power supply to another; power factor correction presents different points of view depending on who you talk to. Perhaps, Dan could explain hell a lot better than I ever could. As far as I'm concern, the lower wattage is saving however slight it may be; the higher Power Factor may or may not yield higher efficiency. Time to invest on dummy load :)
Wrapping it up ->