Gpu not boot

[MarkWW]

My specs:
CPU - http://s12.postimg.org/rzpw1luvx/image.png
RAM - http://s12.postimg.org/pc0fr91ul/image.png
MB - http://s22.postimg.org/x4f3w0zw1/image.png

PSU OEM-ATX-500W-E1 12V(18A), 5V(36A), 3.3V(28A).
EN8600GT http://www.newegg.com/Product/Product.aspx?Item=N82E168...
EAX1300 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I try to upgrade EAX1300 with EN8600GT. EAX1300 boot and work ok without any problem.
If I put EN8600GT, BIOS doesn't boot EN8600GT and boot board IGP.
BIOS succeed to boot EN8600GT twice but I don't know why and how.


SOLUTION:This board (M2N MX SE) have problem with many NVIDIA cards, better is try RADEON.