Yeah I been having green screen white pink black on boot and even while installing any version of windows and goes to sold color when windows does boot all the research I've done is 99 % of the time its vid cards that are bad. 
And not the power supply also monitor supports VGA and dvi has to separate tuners and same in VGA mode and dvi. 
cards I got are doing it geforce gtx  650 ti boosts. 
I'm running a 
Asrock 990fx extreme 6 board
Ultra x3 1000 watt  psu bronze
16gb of muskin ddr3 2133 MHz 4x4gb
And fx 9590 fx 5 GHz 8 core 4.7 base auto clocks its self between 4.7 and 5 at default clock speeds
And I can barely even get windows installed  let alone boot up
And if it was a power supply issue like some site say you see the system hanging and locking up that is not the case screen does rand Dom solid colors non stop  and 99 percent chance it's always the graphics card 
Already been through thousands of forums in a week and contact with support to evga and as rock new egg and ultra 
 
Had the same problem years ago on a dual geforce  8600 gt  black edition cards 
That time around only one card was doing it 
Other card was fine but XFX tried saying it was my power supply and geus what it was not 
 
So with the case on the 650 ti boosts I got  I'll keep ya posted
Cause finally got evga to RMA both cards cause I can't afford to ship em in sepratelly hell took me months to even save up for a new board CPU and ram