Anna, your motherboard is designed to function without difficulty when only one video card is installed. The manual will explain that there is a card on the motherboard which should be plugged in one way when only one video card is being used and plugged in another way for SLI operation with two matching video cards installed. David, the ability to pair onboard graphics with a dedicated video card is only now being introduced with nvidia's latest line of chipsets, such as the 780a. Anandtech has a preview of this chipset, here, http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3305 . While the integrated graphics can be matched with a relatively low-end video card in a SLI configuration, it looks like the real benefit of this new chipset will be in it's capability of switching back and forth between the integrated graphics and a dedicated video card (or cards) depending on the application being run. With highend gaming cards consuming quite a bit of power, this new configuration will allow the gaming card to be put into a sleep state, while the low power integrated graphics chip takes care of a 2D desktop. The dedicated card (or cards) are brought back online when an application such as a 3D video game is started. At least that is the idea, I'm not sure if the implementation has fully worked out all the kinks, yet. John Sproule -------- Original Messages Below -------- Date: Mon, 19 May 2008 23:22:13 -0700 From: David Gillett <[log in to unmask]> Subject: Re: Video Card On 19 May 2008 at 20:25, g.Computer9f wrote: > Yes. I misunderstood. The PNY is running Nvidia GeForce6. I'm now > trying to figure out whether the fact that I only have ONE video card > installed will matter to the GeForce6 SLi driver.... > AnnaSummers > > ----- Original Message ----- > From: Gary Tennesen > > The PNY more than likely is running Nvidia chipset -- are you sure that > device manager is not reported your PNY's chipset (Nvidia 6600)? My first thought was along the lines of "She spent extra money and effort to duplicate, in a slot, the vidoe built in on the motherboard?" But although it's the same chipset, it's not an exact duplication. For one thing, although the AGP video card has it's own RAM on board, the motherboard video proabaly uses a chunk of system RAM. Odds are that this can be rewritten by software a bit faster, but access by the video refresh circuitry may slow down software performance... That, in turn suggests that the different performance characteristics of the two sets of video circuitry may be different enough that SLi cannot link them together. David Gillett Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com