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Two PCI-E x16 slots, but NOT SLI!!- nForce4 Ultra Motherboards

post #1 of 8
Thread Starter 
I noticed a few members that want an SLI setup and had their eye on a motherboard with the nForce4 Ultra chipset. However, motherboards with this chipset, even those with 2 PCI-E x16 slots, do NOT support SLI. An example of such a board is the DFI LANPARTY UT nF4 Ultra-D Socket 939 NVIDIA nForce4 Ultra ATX AMD Motherboard.
http://www.newegg.com/Product/Produc...82E16813136152

The nForce4 Ultra chipset is not designed for SLI. The functionality of the dual PCI-E x16 slots is to provide support for quad display setups. Or, DFI took a more expensive SLI board, stripped the functionality, but was too lazy to physically remove the second PCI-E x16 slot.

I hope that you all are aware of this
    
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post #2 of 8
Yea. I'm very aware of this, I'm going to get that exact board within the next month. However there's a mod to make the board SLi which I will do if I get a second 7600GT.
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post #3 of 8
Thread Starter 
Yes, I believe there is a mod, but I am not sure if it works for the newer versions. I posted this message for those people who believe that this board supports SLI, and who do not want to mod their boards
    
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post #4 of 8
Quote:
Originally Posted by Chozart
Yes, I believe there is a mod, but I am not sure if it works for the newer versions. I posted this message for those people who believe that this board supports SLI, and who do not want to mod their boards
good find, I never knew that information.
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post #5 of 8
I have always wondered why an SLI board had a ultra chipset
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post #6 of 8
Good to know, thanks for the heads up.

I read this on the DFI site:

Quote:
# SLI mode - 2 SLI-ready graphics cards (use identical cards) on the PCI Express x16 slots. - Each x16 slot operates at x8 bandwidth. When the graphics cards are connected via the SLI bridge, the total bandwidth of the two graphics cards is x16.
Is this with every SLI board? or are there boards that run x16 on both slots in SLI?
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post #7 of 8
Quote:
Originally Posted by Carni4
Good to know, thanks for the heads up.

I read this on the DFI site:



Is this with every SLI board? or are there boards that run x16 on both slots in SLI?
Yea, some run 32x = 16x Each card = full bandwidth.

A8N32-SLi Deluxe, and some other boards (Abit & MSI).
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post #8 of 8
Thread Starter 
SLI boards come indeed in two flavors: those that drop back to double x8 speed and those that support full x16 speed. Examples of the latter are these:

http://www.newegg.com/Product/Produc...ice=&maxPrice=

The practical difference is negligible however, dual x8 is more than any current Video card/game can handle, except when stressed to the absolute maximum (even then I can't really imagine)
    
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