very good NT, save perfectly to his PC to power trim, here's "brand" really better!

Had a couple of years a LC-Power LC6550 1.3 550 watts, actually never had problems with it. Until I've bought a new graphics card and a power consumption meter. The new graphics card, the LC-Power now consumed a whopping 305 watts under full load, and was to the still loud. Despite the bold inscription of 550 watts, the LC-Power was at 305 watt load already at the end of his performance, because it can provide on the 12V line only 24A. On the contrary to 80+ Gold brand power supplies, because they can transfer their almost complete power to the Home User's PC so important 12V rail.

The differences in consumption in my system (Intel i5 2500K, AMD 270X R9, X-Fi, 1xSSD, 1xHDD and Bluray drive), the LC-Power are enormous for Seasonic G-450:

LC-Power LC6550 V1.3:

Idle: 80 Watt
Full load: 305 Watt

Seasonic G-450:

Leelauf: 59 Watt
Full load: 227 Watt

I just decided against the beQuiet Straight Power E9, it provides similar performance data and also 5 years warranty while a quieter fan, but the built-in electronic components are not as high as in the Seasonic G-450, which promise mainly greater stability and durability ,
When the G-Sasonic 450 does not drive to its performance limits, but the fan for me is also here almost inaudibly, my Scythe S-Flex Gehäuseüfter is somewhat more audible.

Pro:
+ Very efficient, low power consumption
+ 5 year warranty with supposedly good support in D
Installed + quality electronic components
+ Delivery, with pocket for cables

Contraindications:
- Removable ribbon cable can be stowed in the housing worse
- A bit expensive

Conclusion:
In addition to the G-450 Sesaonic I had a short FSP Aurum S (identical to BeQuiet Straight Power E9) in the computer, and this yielded consumption comparable to the Seasonic. According to my present experience I must say that when power supplies brand appliances are really better than the Billigheimer. The power supply is actually underrated component in the PC.

For Seasonic I can only say that it for 2 months unobtrusive, quiet and stromsprend giving good service. :-)