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possible to power up iMac 27 2010 with ATX psu?

I want to troubleshoot a problematic imac 27 2010 logic board without its original psu+case. Is there a way to power it up with a ATX psu? I searched but only found a G5 solutions but the pin/psu used in the 2010 imac seems to be different. Does anyone know?

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