I managed to make a adapter that works great. I took a dead power supply and cut 2 of the wires out of the middle of the 20 pin main mb power plug. Both were black, if you are holding the 20 pin plug horzional they will be one on top of the other, be sure you get a pair with square plug and a rounded plug. The rounded part of the plug has to face away from the square plug (not toward it). Look at the 2 empty sockets on the card to see what I'm talking about. There are 5 pairs that will work but only 2 have both wires black (color is not important but it looks more professional if you use 2 black wires). When you cut it out, you will ruin the pairs on either side of it. You have to trim it very neatly and sand or file it very thin on both sides to get it to slide in without much effort (be patient). Test fit it with your system off till you get a good fit. Then you get a molex pass thru adapter like comes with most fans (male on one end, female on the other) and you remove the yellow and red wires leaving only the the 2 black center wires in the female molex conector. Cut them (black wires) off at the male plug and toss that end (you dont need it). Attach the black wires from your homemade 2 pin pci plug to the black wires from the female molex conector and you have a adapter that works great.
so at least when I do upgrade and the new card has a 8 pin don't need to buy the special cable.
