in built GPU or not? what PSU is enough?build compatibilty ?

[Ahmead Alani]

i'm planning to build my own custom build PC after endless hours of searching and comparing i've came to this:
AMD FX-8350 4.0GHz 8-Core Processor
MSI GeForce GTX 770 2GB TWIN FROZR Video Card
MSI 970 GAMING ATX AM3+ Motherboard
G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory
1 TERA Byte HDD 7200 RPM Western digital
now i have some question
1st: how should i choose the right PSU ?how many watts ? and is there anything else aside of watts ?
2nd: since the AMD fx doesn't have in built GPU will the GTX 770 contentiously running draining it's life ? if the driver failed or anything happened to the GTX 770 will my PC completely shuts down? should i consider Intel because of this ?
3rd:is there some compatibility issues with the build ?

 

[Outlander_04]

The graphics card will go in to a low power 2D mode when you are not gaming .
Just like onboard graphics if the driver fails it will still be letting you see a basic desk top

To size a PSU
http://www.realhardtechx.com/index_archivos/Page362.htm

By following the links in that page you can learn all you need to know