Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Is this Power supply continuous power or peak performance wattage?
Document: Seasonic is well known for quality and reliability. Purchased 7 months ago after reading several great reviews. The power supply lived up to all of my expectations. Wish it cost less but still a great design and performance for the money. The Hybrid silent Fan Control is awesome! Highly recommend.
I like the fact it is fully modular unlike Antec's etc. It is also a single line 12 volt power supply which according to most experts is better than a multi line of the same wattage. So too, review tests show the X850 can handle up to 1000 watt loads. Highly Recommended.
The Hybrid Silent Fan Control provides three operational stages: Fanless, Silent, and Cooling Mode. In addition, there is a switch provided to allow for manual selection between the Seasonic S2FC (fan control without Fanless Mode) and the S3FC (fan control including Fanless Mode). The fan itself uses the world-renowned Sanyo Denki Ball bearing fan made of the highest quality components to ensure maximum quality and performance.Cons: NoneOverall:  I would highly recommend this power supply.
I bought this because my mining rig needed  little more power to run 4 gpus. I had a 650w made by topower and when the wattage would rise above 670, the computer would shut down. I installed this psu and the exact same rig is now drawing 530w with this psu. This thing is far more efficient than my last psu and will save me a ton of money in the long run.
This has been a great high power PSU with a single +12V rail design that has survived overclocking my i7-2600K and feeding a power hungry GeForce GTX 470 and a handful of high capacity hard drives. I've recently upgraded to a GeForce GTX 770 (4-GB) and although the idle power draw has dropped, the peak power draw can still be quite high. This PSU has kept up with my demands and shows no signs of failing yet.
From reading many reviews and publications they are supposed to be completely rock solid.I installed my new PSU and I have zero problems. This bad boy is almost dead silent, I don't think the PSU fan has ever cut on under load. I don't even think I am giving this thing a challenge. Great PSU, great performance, zero problems and super efficient. I love it! Thanks Amazon and thanks Seasonic!
This power supply are the best, you only need buy one this to love :D other carriers like thermaltake is not good.
this is bar none the best make of power supply out there. the packaging is exquisite, the unit is flawwless in its velvet bag it comes in and overall the best power supplies i have purchased and i have purchaed 5 PSUs here and nothing compares not even the top of the line corsairs or EVGAs
The one good thing is that seasonics have always been made in china, so I'm pretty confident they know how to make a power supply. Any unexpected failures down the road and I'll update this, but if I need another power supply for another build, I'll be buying a seasonic again.
UPDATE, 2013/11/02: unfortunately, the power supply seems to be dead, after working perfectly for 9 months.Last week, my computer began to "not power up". I pressed the power switch, and nothing. Then, after leaving the supply turned off for an hour or so, the PC would boot up again and function normally.This happened twice. After that, no more.
Answer: Directly from http://www.enthusiastpc.net/articles/00002/   "Two top brands that are also their own manufacturers are SeaSonic and Enermax. These power supplies are made using high-grade components and usually carry their continuous rated Wattage on the label. Due to the high-grade components and usage of the continuous Wattage these power supplies may appear to be less value for money but in reality they are usually among the top value for money offerings!  A 650W SeaSonic unit is often a better choice than an 800W unit from a cheap and/or unknown brand. More expensive power supplies usually also have more extensive failsafe measures in place and are thus safer for the expensive components inside your PC."  Hence, I consider them continuous rated PS units.