I'm trying to add a third monitor to my PC but I've run out of HD slots. I only have a VGA connection left and my third monitor doesn't have a vga connection. I just bought a VGA to RCA cable (I assume they're both analogue) but the connections are red, green and blue as opposed to the red white and yellow I was expecting for an RCA. After a wee bit of research, it turns out that this is "a piece of crap" and won't work. Does anyone know why? And if this is indeed not what I need, how could I connect the third monitor? The graphics card can handle it (radeon hd 7770) and the monitor (It's actually a TV) has the red, white and yellow RCA connection, HDMI and SCART. Thanks for any info in advance!