Power Supply Help

Hi i seem to have a problem in my computer with my Video card output crashing, especially when i go to full screen. Well the graphics card is brand new. A few others that i talked to indicated that its my PSU and i believe them since i have a 650 Corsair 12v single rail. Its trying to power a Nvideo GTX 750 Ti, and a I7 4th Gen CPU.

So i don't know a whole alot bout Power supplies, so i need some assistance in picking a good one out. Its better to have something that is overkill that won't crash as much in the case of a volt surges,  then it is to have one that is insufficient in power. We have quite a few power outs in the home. I have bought a pretty good Power surge protector though for my computers.

I want to purchase a PSU that will power my computer easily enough. Now either the PSU i currently have in this system is just having some issues, or its insufficient in power. It seems to have done this when i upgraded my computer with a new graphics card. I am almost certain its the PSU though cause i have checked literally everything else including installing a new motherboard.

So with that being said, i need some help picking out a good PSU, now is it better to have multiple rails or a single rail PSU.

Here are my specifications for my computer

Graphics Card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814487028

Mother Board: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131837

RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E16820148679

Inernal HD: http://www.newegg.com/Product/Product.aspx?Item=N82E16822236339

Power Supply: http://www.newegg.com/Product/Product.aspx?Item=9SIA25V22S9555&cm_re=650_Watt_Corsair-_-9SIA25V22S9555-_-Product

to be honest in my opinion i don't think it's your power supply that's the problem, that is a good make with more than enough power to supply your needs.

anyway to answer your questions, that graphics card only requires a 300watt psu, i personally think a single rail is better than multi rails but either will do.

only buy psu's with an 80 plus bronze rating or higher, if your sure the psu is the problem then i don't see a reason to not buy the same psu again, but if you want a different brand then this one comes with good reviews. :-  http://www.newegg.com/Product/Product.aspx?Item=N82E16817438059