Review Index:
Feedback

Enermax TriAthlor 550W Power Supply Review

Manufacturer: Enermax/Ecomaster

Efficiency, Differential Temperature and Noise

Efficiency

The overall efficiency of a power supply is very important.  The less waste heat generated the better!  Efficiency is defined by the power output divided by the power input and is usually expressed as a percentage.  If a PSU were a 100% efficient (which none are) 750 watts of AC power going in would result in 750 watts of DC power coming out (with no waste heat to dissipate).  In the real world there are always inefficiencies and power is lost in the form of heat during the conversion process. Newer revisions to the ATX12V Power Supply Design Guide V 2.2 have continued to increase the efficiency recommendations for PC switching mode power supplies and now lists both required and recommended minimum efficiencies.

View Full Size

We measured the AC power input to the TriAthlor 550W PSU with an Extech power analyzer while the total DC load was found by adding all the individual +3.3V, +5V, +12V, -12V and +5VSB loads together. 

View Full Size

View Full Size

The overall efficiency of the TriAthlor 550W power supply is good and meets the criteria for 80Plus Bronze certification, even while operating on 115 VAC and at elevated temperatures, which can often be a challenge for power supplies. 

80 Plus Program

View Full Size

Note 1: Power Factor =0.90 (50% to 100% Load)
Note 2: Tests conducted at room temperature (25°C)

Differential Temperature and Noise Levels

To simulate real world operation, some of the warm exhaust air from the PSU under test is recirculated back to the intake through a passive air duct, which allows the PSU air inlet temperature to increase with load, just like it would in a real PC. 

The differential temperature across the power supply was calculated by subtracting the internal case air temperature (T in) from the temperature of the warm exhaust air flowing out the back of the power supply (T out). 

Thermocouples were placed at the air inlet and exhaust outlet. The ambient room air temperature was 23ºC (74ºF) +/- 0.5ºC during testing.

T out = temperature of air exhausting from power supply
T in = temperature of air entering power supply
Delta T = T out - T in

Sound pressure level readings were taken 3’ away from the rear of the case in an otherwise quiet room.  The ambient noise level was ~28 dBA.  I was not able to take SPL readings at the higher loads due to the background noise generated by all the DC Load cooling fans cycling on and off.

View Full Size

The TriAthlor 550W PSU uses Enermax’s thermal speed control circuit that slowly increases the fan speed as the load increases and internal component temperatures heat up. The PSU is relatively quiet at low to mid power but the fan speed quickly ramps up above 50% load to the point where fan noise becomes very noticeable.
 

September 18, 2013 | 08:48 PM - Posted by HostageKostas (not verified)

o nikos pinei iremos to kafedaki tou kapou sto syntagma,
kapoia stigmi vlepei to filo t to giwrgo kai pernaei apo
mprosta tou kai ton fonazei.
-giwrgo ela na se kerasw kafedaki kai na ta poume

-ti einai ola auta ta xartia pou exeis mprosta sou?

-logariasmoi giorgo mou eutixws tous eksoflisa kai to
apolamvanw....

-ti? kerdises to laxeio?

-oxi niko mou alla ekana kati pou mporousa na to kanw
eixe i gynaika mou kapoia kosmimata poume den ta forouse
kai kati skeuh asimenia pou den ta xrisimopoiousame,
ta peira loipon kai phga edw stin koloktroni 9 ston kurio
spiropoulo kai ta poulisa.
mou edwse kala leuta kai etsi eksoflisa olous tous logariasmous
mou kai tora to apolamvanw....

http://www.enexyra-athina.gr/

September 18, 2013 | 08:49 PM - Posted by HostageKostas (not verified)

o nikos pinei iremos to kafedaki tou kapou sto syntagma,
kapoia stigmi vlepei to filo t to giwrgo kai pernaei apo
mprosta tou kai ton fonazei.
-giwrgo ela na se kerasw kafedaki kai na ta poume

-ti einai ola auta ta xartia pou exeis mprosta sou?

-logariasmoi giorgo mou eutixws tous eksoflisa kai to
apolamvanw....

-ti? kerdises to laxeio?

-oxi niko mou alla ekana kati pou mporousa na to kanw
eixe i gynaika mou kapoia kosmimata poume den ta forouse
kai kati skeuh asimenia pou den ta xrisimopoiousame,
ta peira loipon kai phga edw stin koloktroni 9 ston kurio
spiropoulo kai ta poulisa.
mou edwse kala leuta kai etsi eksoflisa olous tous logariasmous
mou kai tora to apolamvanw....

http://www.enexyra-athina.gr/

Post new comment

The content of this field is kept private and will not be shown publicly.
  • Lines and paragraphs break automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <blockquote><p><br>
  • Web page addresses and e-mail addresses turn into links automatically.

More information about formatting options

By submitting this form, you accept the Mollom privacy policy.