This could be why (I had no idea all this rubbish existed)
My adapter has the socket titled DVI-I (Dual Link)
I do however have an adapter which does have some pins missing which looks like the DVI-A one at the bottom of the picture
However I've tried this before as well and it gave no luck, so what the helllll bitch!
A website said something about "your DVI graphics card needs to be capable of analogue output" but surely almost all cards are?
Is my X850XT or 7950GT capable of analogue output?