It's quiet.
It's not silent, but it's one of the quietest PSUs in that power rating range you'll find.
And FYI, the only "Whisper" quiet is the 350 watt version.
The 430 and 550s are not whispers.
But my 430 is quieter than my 26CFM YS Tech, which admittedly isn't all that quiet, at about 33dbA.
I think that the PC2002 specs or whatever for noise emissions state 27, and the 430 watt can't be much above that.
Personally I consider quiet down around 22dbA...but then I'm trying to make a PC with a single 16dbA fan...so I'm a little nuts when it comes to quiet.
And there are 8 4pin molexes and 1 4pin floppy connector, along with 1 20pin ATX, 1 4pin ATX12v and 1 6pin AUX Server.