Hi I've recently put two identical BFG 6600GT's into my computer connected them properly with the appropriate adapter with J1 going to the top card and J2 to the second card. I have my monitor cable connected to the first video card. If i go: My computer > Properties > Hardware > Device Manager > Display adapters it shows two "NVIDIA Geforce 6600GT's" directly next to each other. That tells me that it's picked both my cards up but for some reason I'm only bench marking at the same score as I do with one 6600GT in my computer. I've re-installed drivers etc, tried two different drivers and nothings changed. I've been told that you need to tell your computer to run in SLi mode but when I go to the NVIDIA control panel I can't find the options to do so. Can someone please tell me how to make sure my SLi cards are enabled and working preferably with picture references (if possible) to make it easier for me to understand, thanks.