what motherboard do u use

[Cain]

Thx, sounds like the 750 is what I want then ..

[juneau]

No mate they Both run at 16x on the motherboard

Maybe i'm thinking about the 650i then.

[Ghost_Rain]

Maybe i'm thinking about the 650i then.

Yes mate the 650i Only worked in SLI at 8x each slot where the 750i runs at 16 in each slot

[Warhead]

If you have only 3GB of memory you are not using the whole potential of your system , because its not running in dual channel. you have to have 2 pairs or 4 pairs of identical amount of memory to take the advantage of your hardware.
1x1GB 2x2GB 4x1GB 4x2GB or 4x4GB

you can usually get away with using 2 1 gb sticks, and 2 512 mb in the appropriate sockets and run fine in dual channel. even if it doesnt, intel flex memory mode usually kicks in, if your board supports it

[WalkinTarget]

Here's a nice chart detailing the differences between the 750 and 780 boards:

http://www.hothardware.com/Articles/...i_SLI_Arrives/

Keep in mind that the eVGA is a non-reference board and does in fact support Tri-SLI as well as 2x16 PCIe slots for video cards, so the chart gives you some info on variations, but its another reason why the eVGA board is the such a good performer as well.

Hopefully my Vista install will only require a phone activation after the board swap. I may just wait two weeks until I order the 9800 card so that I can do all the hardware changes and activation at once.

[Cain]

When running in SLI mode, the 750i?s PEG slots operate in a dual x8 configuration, whereas the 780i SLI has 16 lanes of dedicated PCI Express connectivity to three PEG slots. In fact, the nForce 680i SLI has a total of 62 Gen 1 and Gen 2 PCI Express lanes.

[bobytt]

Well as i said i got 780i and i have the feeling that overclocking potential is bigger with 780