The Asus Xonar DX AUDIO card which I recently purchased requires power by way of a 4-pin connector. The supplied cable with the audio card has a 4-pin connector on one end and a wide 4 pin male connector on the other end. The power supply on my Dell Studio XPS 435MT only has one free cable marked P7, with 2 rows of 3 holes on each row. Can the P7 cable be used to provide power to the audio card if I can find the correct adapter cable for the cable which came with the audio card, and if so, where can I purchase this type of adapter cable. I need a site which shows pictures of the cables so that I know I am purchasing the correct adapter cable.The "wide 4-pin male connector" sounds like a standard Molex connector. The 4-pin female connector is a standard FLOPPY disk DRIVE connector which is connected to the audio card at the top Rh corner of the image below:



The Molex male connector should be connected to a Molex female connector. As you don't have any spare connectors get a Molex 'Y' to split a power supply as below:



ANOTHER consideration, check that your power supply is rated high enough to handle any extra loadings you have already put in place.

Good luck

The power supply is 360 watts. I do not know the brand name. The power supply does not hav a Molex female connector. If it did, I have access to a Y-cable. I will probably exchange the Xonar DX for one of the Sound Blaster PCIe audio cards which do not require power from the power supply.
Get a Molex splitter. unplug one of the other DEVICES- connect the splitter, and then connect one of the "split" ends to the device you unplugged.

Now use the other free molex for the floppy/molex splitter.