The main problem with Topower TOP-1100P10 (and consequently with Tagan models based on this project) is its +5VSB output, which can’t deliver its labeled current and power. When we pulled 3 A from it – half of the labeled limit – noise level was above the maximum allowed. So the project for this specific output is flawed.

Besides that this unit could deliver a high efficiency if you pull up to 80% of its labeled power (880 W). Pulling its full load efficiency drops a lot but is still above 80%, which is the minimum we want from a power supply at full load nowadays.

Voltage stability and noise level were also good, within the expected.

Another thing we didn’t like about this power supply was the fact that it uses two 80 mm fans instead of one 140 mm one, which certainly makes this power supply to be noisy and hotter than competing products.

If the +5VSB flaw does not bother you (and honestly you shouldn’t worry about that) and you don’t mind having a noisy product power supply models based on this project like Tagan ITZ1100 are good options on the 1,100 W range, especially because this model from Tagan can be found at an outstanding price at Newegg.com: only USD 180.

Certainly there are better products on the market, like Corsair HX1000W, but they come with a higher price tag. But Topower TOP-1100P10 is far from being a bad product like OCZ ProXStream 1000 W.