Bought this about a month ago based on the positive feedback on this site. I installed this in my PC and the first thing I noticed was that it was louder than everything else in the PC, including my graphics card! I was totally shocked, not what I expected at all.
The Corsair website describes this unit as having an "ultra-quiet" fan and the PSU having "exceptionally low noise levels". I disagree. This kind of marketing suggests this PSU should be quieter than other components in your setup (such as your GPU). A little more digging reveals that this PSU has a noise output of 25dB at low power loads; compare that to the AX750 which supposedly has 0 dB output (fanless mode) at the same loading.
While the TX750 isn't exceptionally loud, I would go for the Corsair AX750 or AX850 if you want to build a truely silent PC.
Good PSU overall, and solid build, but not as quiet as you might think going by other customers comments or the hype on the Corsair website. Spend a little more and get something that is truly quiet (like the AX range from Corsair) if that is what you are after.
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