Was hoping someone might be able to help me on this as I have hit a stone wall now. Purchased a 2nd Hand PC with a Nvidia Titan X graphics card in it. The card is now faulty it powers up but there is no display. Nvidia will not replace the in warranty card as 1) I don't have proof of purchase for the card and 2nd) the warranty is not transferable. Any thoughts to how I can get them to replace the card that is still under warranty and cost over £1,000 new?