[SOLVED] Black screen after installing a GTS 450 graphic card on ET 1850

[TechNewbieeee]

Hi guys, Im having a black screen after I installed my GTS 450 graphic card. Is it because of the non compatibility of the card with my motherboard? The motherboard Im using is ET1850.
Hope anyone can give me some advice for this!
Thanks in advance!

 

[Unolocogringo]

The original power supply(250 watt) does not have a 6 pin power connector the card needs.
Did you change power supply?