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Topower PowerBird 1100 Watt Special Edition Power Supply

By: David Walker | Other PSUs in Cases, Cooling & PSU | Posted: Mar 3, 2009 5:00 am
TweakTown Rating: 94%Manufacturer: Topower

Test Results


Our load tests leverage a couple of FAST ATE active load testers and a variety of other equipment such as a hotbox, oscilloscope, power conditioner, temperature probe and a power consumption meter. You can read more about our standard testing approach here.


Our first five tests represent incrementing classes of modern gaming systems with the last test catered to the full spec of the power supply at up to about 1 kW. We measure voltage output at each load, ripple and efficiency. Now, for the Topower PowerBird 1100 Watt results:


Topower PowerBird 1100 Watt Power Supply


Topower PowerBird 1100 Watt Power Supply


The Topower PowerBird 1100 Watt power supply delivered some excellent results. First and foremost, check out the 3.3V performance. That is a solid result with almost no deviance from initial load. The same holds true for the 5V results. Again, spectacular results.


The 12V results were also very good. You may have noticed that 12V5 and 12V6 dropped a little under load beginning at Test 4, but considering it took a load well over the rated 20 amps per rail to drop the voltages below 11.8, this is actually another excellent result. Test 4 posed 23 amps of load on each rail and Test 5, 24 amps. These loads represent the power draw of two GTX 295 cards under full load. Considering the extra duty, the power supply operated flawlessly and operated within ATX specifications defined as voltages above the minimum 11.6. Very nice indeed, and at 50C, no less! You have to appreciate those results considering the extra load.


ATX specifications permit up to 120 mV of ripple on the 12V source and the PowerBird results were, once again, very solid. Results were well under 60 mV even at peak load; another stellar result for the Topower PowerBird 1100W power supply.


Now, as a deviation from the normal tests and due to the use of six 12V rails, we added one more hotbox test, 4B, to represent loading three GTX 280 graphics cards; similar to the 46 amps of draw for the graphics cards on Test 4, but, spread evenly over three rails. For this test, we grabbed power from 12V4 to power 15 amps of load for the third graphics card. During normal tests, this rail had no load defined. Now, with three rails loaded with 15 amps each, the results improved over loading the two PCI-E rails with 23 amps each. Efficiency and voltage results were more similar to Test 3 when all rail loads were well under 20 amps. Another great result.


So, what about efficiency? Even though we were unable to find any record that the Topower was 80 Plus certified, results certainly show that it would easily attain this certification. With normal load results approaching 87%, the claim of up to 85% efficiency looks to be accurate. Yes, there were results under 85%, but, to be fair, those tests slightly overloaded two of the 20 amp rails and even with this extra load, the power supply was still able to deliver 84% efficiency. The Topower PowerBird 1100 is a very capable power supply. Performance was nothing short of outstanding.


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