Powerful, quiet, reliable. Perfection!
346778
PERFECT! I have several of these and carry one everywhere I go. I lecture; they sit on the podium, offer fantastic, QUIET cooling. Hot flashes have plagued me for over a dozen years... I don't know what I would do without these powerhouses. They last forever and do a fantastic job.
1185492
Fantastic!  Quiet, very powerful.  The 2 settings are plenty.  I love this!  I have used it for leaves, dust, dirt, and light snow.
4659616
Before I bought this power supply I have had two, the one was a Corsair HX1000, but it got "destroyed" by my ASUS MARS II graphics card, because it required way too much of my system and combined with an Intel Core7 990X Extreme Edition it was a not go.
In the meantime I had gotten a EVGA Nvidia GeForce GTX 690 signature Edition and the older PSU I had in my pc, a Chill Innovation M1000 I had bought half a year ago could died. I needed a PSU, badly! And I had an OCZ PSU which had served me well.

Then I tripped over this PSU over the internet and thought I wanted to buy it since my last one broke down. I would never buy a Chill Innovation PSU again, the support service is a joke.
But fortunatela a friend of mine told me never to buy a PSU with dual rails so I listened to him. I also wanted a PSU which was fully modular and at least had a Gold Certification since my electricity bill, to my regret, had been horribly big. My friend also told me a PSU with at least 1200 watts of power should be perfect for my system. Once again I took his advice seriously and ordered the OCZ ZX series 1250W and I was not disappointed in the least to say.

It works like a charm and its very silent, and I cannot hear it at all which is very satisfying. I like the design of it with the golden label and that is has a whopping 104 amps on the single 12 volt rail! It is also stable as a rock and is perfect for my triple SLI setup in the future.

Remember to have some space in your case since it is quite big, but it is worth it and the fact you only have to connect the cables you need is a huge advantage. I had to dent a piece of metal in my case or else it would not fit! It also cleans up the usual cable clutter and make the interior of your system look nice, especially when you a case like Corsair 650D Obsidian which I have.
I had to dent a piece of metal in my case or else it would not fit!

Pros:
Rock stable performance
Silent
Huge 104 12 Volt single rail
Perfect for a really powerful SLI or Crossfire setup
Delicious quality
Price vs. Performance is excellent

Cons:
It is big, remember to measure your PSU space in your case
Quite heavy, can be annoying if you are carrying your gaming rig to LAN parties
Will not fit in every case, but okay you would not have a little case for this beast of a PSU!

Overall: I am very satisfied with this PSU and would recommend it to everybody anytime.
It even matches up to those expensive ones from Corsair.
1583890
I upgraded from a CX500 to this quiet optimized PSU and have been extremely happy.

Pros:
Noise: As advertised the unit is extremely quiet.  There is absolutely no detectable coil whine, and the fan is also nearly silent.  Also, the fan does not operate at all under idle and small loads.

Efficiency: The unit is 80 plus Gold certified making it extremely power efficient for a PSU at this price.

Modular: unit is fully modular with clean looking black ribbon-style cables.  I'm not sure if I wouldn't prefer the more traditional sleaved cables, but these do make managing space quite easy as they can lay flat against the side panels of your case.  Also, the unit comes with plenty of connectors (2 EPS, 6 PCIE, 10 SATA, 6 Molex, plus 2 floppy adapters).

Power: Whenever you're choosing a PSU you should always look for its rating of continuous power and not peak power.  This unit is rated for its full wattage for continuous power on a single +12 V rail.

Cons (All minor):

PCIE Cables: Corsair chose to put 2 PCI Express connectors on to each cable you plug into your PSU which I understand in the sense that most higher end GPUs use 2 connectors, but it ends up being awkward trying to get the two connectors plugged into the card and also there's a big unattractive loop of cable that just hangs off to the side.  Obviously this doesn't matter if you can't see into your case but mine has a nice big window so I want my cables to look clean.  I would've liked to either have all PCI Express cables come with only one connector.

Other Thoughts:
The unit comes with the capability of taking advantage of their Corsair Link software to monitor the fan and voltages.  It's a nice feature, but you need to purchase an analog to digital bridge for about $10 to take advantage of that.  It would've been nice if they'd have just included it but even if I wanted to just buy it, I currently can't seem to find anyone in the US that has it for sale, including Corsair themselves.  So for those purchasing in the near future you may have trouble taking advantage of this feature as I am having right now.

Despite those minor caveats I do recommend this PSU to anyone for their next build that wants a quiet, efficient and reliable (so far) power supply.
665467
I upgraded to this drive from a new 500MB WD model that failed after 9 months of hassles, bad sectors plus power consumption problems.  This drive is faster, quieter, and so far (3+ months) extremely reliable. I use it as a primary drive in a Core2Duo PC running XP Home, no RAID.  Will always buy Seagate again, I have no other affiliation to them besides being a satified customer.  32MB buffer makes a noticeable speed difference over my old 8 MB. Did not need to load any of their software, it ran perfectly out of the box.
2070923
I've purchased a couple of these HDs over the years, and I've always had great luck with reliability.  Price is right, they run quiet and cool, and they have a low profile presence.  Buy with confidence!
2548612
Dependable. Solid - well built.  Good power.  As of June 2017 I have 158k miles and it still runs great with only minor maintenance needed to date.  Poor MPG is the only complaint I have.
801855
I've been using mine for over a year and I love it. Quiet and powerful. I almost went with one of the cheaper ones but I'm glad I didn't. I can't imagine anyone makes a better disposal.

Update: 3 years in and it is still going strong and quiet. I've chucked everything down this puppy, it doesn't care. You could probably "recycle" batteries in the manner of Pam on "Archer" with this thing. Good stuff!

Update: 7 years later, still going. It might be a bit noiser now, but still beats the cheap ones. I'd buy this again if necessary.
446234
Hooked it up to my new IBUYPOWER Beast of a PC and it works and looks great. Quiet as hell. Buy it!!! Liked it so much I bought 2 more.
653991
No issues. Great power and quiet. Only complaint is I wish it had a full bag indicator.
2832505
This card is incredible! Handles anything I throw at it and more! It's quiet, fast and it looks gorgeous! I'm honestly so glad I chose this over the Zotac AMP Extreme and the ASUS STRIX OC. I never want to leave my PC since I installed this card, I just wanna sit here all day and play everything, on ultra!

I upgraded from a 980Ti Reference Edition. The performance increase is noticeable and it is far cooler (less than 73 degrees Celsius at full load). The 980Ti blower fan had an annoying whine sound when at full load so this is a welcomed breath of fresh air! It's incredibly quiet and the Fan Stop tech is so damn cool.
2747136
Splendid drive. Extremely quiet/fast/reliable. I have 2 of these running in an Xpenology box in SHR mode and they haven't skipped a beat. I plan on buying more for sure.
147307
Super quiet.  You can practically throw a potato in this thing and not have to worry about it.  Powerful and quiet.
1981687
Extremely quiet. Powerful enough for two graphics cards and an Intel i7 Processor.
3403551
best graphics card ive ever owned.  small, low power use, quiet and fits my mini itx perfectly.  would like more future options for aftermarket watercooling.  even running on my CPU (A10 6800k 4.4ghz oc)  i have seen no negligible "bottlenecking" as i can run most games on max settings on my ultrawide (2560x1080) monitor.
will probably get a second one if i upgrade my who system to a newer intel cpu and compatible ddr4 board.
503954
The perfect fan for 120mm radiators or CPU heatsinks. Really quiet even at full rpm and delivers superb temps! I have one on my cooler master seidon 120v and I have yet to see it go above 50 degrees.
1918879
GREAT! Works fine and is perfectly quiet, unlike the previous one it replaced. The previous one was incredibley noisy, bothering workers in the room. Also this one uses much less power and produces less heat- the reason the former one was noisy was that it did produce (wasted) heat, requiring a fan, and the fan they chose to use in it was very stupidly noisy. This is a good unit.