hi i recently built a new pc but now im having a wierd problem there is alternating lines running diagnally down my display i bought a brand new graphics card power supply ram still got the problem what could it be and its not my monitor as i plugged it into my laptop and its fine please help
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Do a BIOS update. Try a different monitor cable. RMA Video Card.
Just do what JefferyD90 recommended. I would also recommend updating your video card drivers.