At first, when I read the technical specifications I was impressed by the technologies this PSU uses to achieve optimal performance/efficiency. Channel Well (the OEM of the unit) used all the assets that modern technology provides in order to present a truly Platinum efficiency unit with ultra high capacity. Apparently they managed to offer very high levels of efficiency and even more impressive is that they did so while keeping the output noise at very low levels. The Toughpower XT Platinum features a very cold operation and even in our hot box the fan didn't start until near 500W load and close to 40°C ambient. Also I had to struggle to keep the unit's internals at high operating temperatures, even at full load. This means that in a normal PC case with good airflow this unit will work fanless most of the time, making no noise at all.
This is a good thing of course but on the other hand I would prefer the fan to engage at lower ambient, in order to reduce stress on the electronic components. Nevertheless, since Thermaltake ships this unit with a seven year warranty, they must be pretty confident in its reliability and on top of that you are fully covered and your piece of mind is ensured. Besides the huge amount of money it costs, the two main performance problems I spotted are the loose voltage regulation at +12V and the excess ripple at 3.3V at full load.

To sum up, I didn't expect to see such high efficiency from a 1300W beast, no matter what technology it used, but apparently the TPX-1275M proved me wrong. If you want to power a ton of components and you seek the highest efficiency possible, at 20-100% of max rated capacity loads, along with ultra low noise output - for a high power unit- then you should really consider this PSU for your next purchase. Usually high loads with low noise output don't get along but in Thermaltake's TPX-1275M things are different.