Archived from groups: alt.comp.periphs.videocards.nvidia (
More info?)
"Frank Eden" <Frank.Eden@T-Online.de> wrote in
news:ckmgaa$kvg$00$1@news.t-online.com:
> Hi JUST ME,
>
> first of all modern SLI will only work on PCI Express boards that have
> at least two PCIe x8 or better slots (ancient *g* SLI was combining
> two Voodoo2 cards). So there there is no such thing as a cheap SLI
> solution. ;-) You will then need 2 identical SLI enabled cards
> (currently 6600ers and 6800ers in their PCIE form factors).
Actually, it will work on PCIe 4x. Most (all?) PCIe graphics cards will
have 16x interface. So you'd need physical 16x slots on the
motherboard. However, the 16x physical slot can be set up electrically
with only enough lines to support 16x, 8x, 4x, etc.
Nvidia has done quite a lot of SLI demos at shows that use a Supermicro
motherboard that has a 16x and 4x (electrical) slot. And Nvidia's web
page says that 16x PCIe graphics cards will automatically negatiate down
to work in 8x or 4x electrical slots (as long as card physically fits in
the slot).
Note also that 4x PCIe is similar to 8x AGP in performance, and will not
restrict for current cards.
Having said that, Nvidia did say that the optimum minimum would be 8x.
This may have something to do with the fact that the NForce4 SLI will be
set up for dual 8x slots for SLI (i.e. not dual 16x).
You probably knew all of this - just laying this out for others....
> Other than that I'd bet you would need a PSU rated with at least 450
> Watts to power all that stuff.
>
> Look at this regarding performance gains
>
http://www.hardocp.com/article.html?art=NjMz
>
> Greetings,
>
> Frank
>
>