Hi all,    I need to know which motherboard my 6 month old XPS 730 has in it, I built it through Dell's 'Alienware' line of  gaming PCs, it's still in a regular XPS730 PC case, I just got a much better machine for actually less money. I cannot find anywhere the motherboard Dell put in my 730, I used sandra Pro for a full report on the hardware but where it show's chipset and motherboard info it only shows a line of question marks (???). we have looked on the board itself but nothing there as of yet.

Also, I recently purchased a second GTX - 280 for the same machine, it installed fine and it's running in SLI now along with an nVidia GTX 280 that came from Dell, but the second GTX 280 was made by xFx, under settings there's the option for operating in SLI so I figure both cards are running as they should even tho each are made by different companies, same chip I think. How can I know if both GTX cards are working properly as I'm hoping they are in SLI ?

tia