I still wouldn't trust that PSU. It will run the 448 core GPU. My PSU is shotty one also so don't push it so it will last a while. If you can afford it up grade your PSU to a Corsair, Antec, Seasonic, and XFX type brands.
Here are two links. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Its an 80+ bronze rated unit, it appears to be OEM only but given the specs i can find on it, it will handle a single GTX 560 Ti 448 Core without a problem, it looks like it could even do SLI without a problem its got enough power on its 12 V rails.
It's a good list for reference but you have to check it close. If you look you will see FSP is also Fortron. Also newer power supplies are not always on the list. If I see an exact model on the list I go with it but if not I try and find a jonnyguru or hardwaresecrets review. Some power supplies like this one just don't have any documentation at least not in English. Not that I could find anyway.