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Microsoft Windows 7 (64-bit)

hello i am using HP slimline 450-010 i3 processor 6gb ram 180W PSU . recently ive purchased nvidia gt1030 low profile GPU and ive installed in to my desktop after installing as soon as i turn the power button ( note : not the Power Button to turn CPU ) Montior display a yellow txt CHECK  VIDEO CABLE . after turning on  CPU power , CPU running asusual . but nothing displays in monitor . after few seconds monitors get back to sleep mode. 

I hope i could find a solution .

 

if PSU power isnt enough plz provide me a link to buy PSU 450W.

 

THANK U 

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