There is an important distinction between who supplied you the hardware ie the packaging on the box or the name on the PC's front, and who actually manufactured the hardware.

 This distinction can be vital, especially in the case of motherboards. Even drivers can be manufacturer specific, often in the case of modems and to some degree with graphics cards also.

 For example, many people with Nvidia cards use 'reference' drivers, supplied by Nvidia themselves. Unfortunately many manufacturers may tweak, or remove functions that are inherent in the Nvidia reference chipset. This may (though usually does not) cause the 'reference' drivers to fail or worse still (from a fault finding point of view) 'glitch'. Besides, if the manufacturers drivers fail, you can justifiably pester the hell out of them for a fix.

 There are a couple of techniques for finding the manufacturer, the easiest (IMHO) is to find the FCC ID on your card (UK comms devices may have a: BABT Number)

   Products after April 13, 1998
   First 3 characters are vendor code, following 14 are product code.

   Products before April 13, 1998
   First 3 characters are vendor code, following 8 are product code.
      This database is no longer updated by the FCC

Then look the code up here:

http://www.fcc.gov/oet/fccid/help.html

FCC ID and BABT codes:

http://www.plasma-online.de/english/identify/serial/fcc_id.html

Any questions, just post on this forum

Unless I pointed you here from an existing forum, in which case go back to that forum