Features:
Right out of the box it was very evident that this power supply looks very sturdy and robust. The fan grill is a lot thicker than most power supplies with an attractive round Thermaltake sticker on the middle part covering the fan hub. Although this looks cool, and hints at the great build quality and feel of the power supply, I'd be first to wonder if the over sizing of this grill probably isn't the best thing for airflow and silence (more turbulence). The finish itself is a nickel black colour, definitely something different than the normal plain black power supplies we see most often.

The array of cables provided with the Toughpower PSU was excellent, but then again, when you're paying this much for a power supply I'd expect nothing less than it to have the ability and expandability to last me many years and many hardware changes! Here's an overview of all the different cable options available on the Toughpower PSU:
Hardwired Cables:
(1) 20/24-pin ATX power lead
(2) 8-pin PCI-E connectors (two 8 to 6 pin adapters are included for these)
Modular Cables:
(1) 4/8-pin +12V power connector
(2) Molex/floppy leads, each modular cable strand has 4 molex and 1 floppy power lead
(2) SATA power cables, each modular cable has 4 SATA plugs
(2) 6-pin PCI-E connectors

All the cables are sleeved with a black mesh sleeving. This not only makes them look nicer but it also helps to streamline things and help improve the airflow within the case.

Cooling of the Toughpower is done with a single 140mm fan. As we know with fans, bigger fans offer more airflow so you can run them at lower RPM thus offering the same cooling ability as a small fan but with much less noise. Since the fan is also thermally controlled, it will also stay very quiet unless the power supply is at a high load and running hotter, The fan inside the unit is manufactured by Yate Loon, which is a company who primarily offers their fans via OEM for other manufacturers to use. They are a very popular name amongst PC enthusiasts for making very quiet and well performing fans.

If this fan isn't quiet enough for you, Thermaltake also includes a silicon noise preventive pad. This pad wraps around the edges of the power supply that make contact with your case and essentially absorbs most vibrations being transferred from PSU to case.

  
(Click to enlarge)

Let's journey into the technical side of this power supply next. The Toughpower 850W features quad +12V rails which is something now very common in power supplies with higher wattages like this. With all components being industrial grade, the power supply has a rated MTBF of >120 000 hours of operation. An independent voltage circuit keeps delivery solid even under really heavy load. Additionally, each voltage line is rated at +/-3% tolerance. For anyone familiar with power supplies or who has looked at many out there, even some of the most expensive ones on the market are generally all +/-5%, so the Toughpower should be able to hold a solid voltage line! Something also very vital to a power supply of this capacity is power fault correction, the Toughpower has an active power fault correction. To better help you understand this I'll quote the definition from endpcnoise.com:
"The preferable type of PFC is Active Power Factor Correction (Active PFC) since it provides more efficient power frequency. Because Active PFC uses a circuit to correct power factor, Active PFC is able to generate a theoretical power factor of over 95%. Active Power Factor Correction also markedly diminishes total harmonics, automatically corrects for AC input voltage, and is capable of a full range of input voltage. Since Active PFC is the more complex method of Power Factor Correction, it is more expensive to produce an Active PFC power supply."
In addition to the active PFC, it also has over current, over voltage and short circuit protection.