I bought a gtx 580 graphics card used and today i put it in my pc and i dont have the power supply connectors (8 and 6 pin) but i just wanted to test it out so my question is do i have to connect the graphics card to the power supply to test if it works because i just put it into my pcie slot and didnt connect the 6 and 8 pin psu connectors and i just have a black screen
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More aboutgraphics card power
Yes, you will have to connect the power cables to the GPU to know if it works.