SLI EN8800 GT, need Help

[Virtue]

I had bought two ASUS 8800 GTX and i plan to setup a SLI. I perform the following. I put my first card in my PCI express turn on and installed the driver. Turn off the system and put my second card in slot PCI Express lite slot. I restart my computer and see in the Nvidia control panel and look for sli tab but there is no tab. I have tried 197.57 257.21 258.96. My other specs are:
OS: Win 7 X64
CPU: Q6600 2.4 Ghz
MEM: 2x2 GB DDR2 800 KingMax
MBD: GA-P35-DS3P
VGA: 2x8800 GT 512 MB
Need your help to get rid of it.

[Archibald]

I have yet not used multiple video card so i do not have great idea about it. There is K9N platinum- the part number is MS-7250-020 and it is not a SLI motherboard and there is K9N SLI Platinum, part number MS-7250-060 which is an SLI board. So see that you are having SLI version. I think you might have non-SLI version see the documentation you are having.

[David23]

It sounds like it is overclocked. you need to have that both the cards be exact same clocks to be SLI compatible. See to it that your EN8800GT is in the slot one. Have latest driver installed from nvidia site which is compatible with your window 64 bit. And then try to run it in Nvidia Recommended mode from nvidia control panel.Hope this will work for you.

[Birdie]

I have installed cards in the system and i installed the driver and when i went to the NVIDIA control panel i did not get SLI option. i tried to install different driver but it wont work. when i run both this independently they both work nice. i am unable to get the best because one is running on 4X PCIe. If you can help me to get my both card working will be great for me. As i am getting the second card for free.