I record HDTV off the air onto my computer and had been viewing the recorded video using the standard S-Video output on my graphics card. I bought this cable to connect the graphics card's high definition DVI output to the HDMI input on my plasma TV to get better video quality. It dramatically improved the video quality of the video on my screen to HD quality.I was somewhat skeptical that this would be so, given the fact that this item cost only $12 and I had seen them priced at $40 and up at electronics stores.I am extremely pleased with this product.