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Socket 775 board that supports 2 x16 PCI-E cards??

V

vr6mole

Junior Member
I am in the market of switching over to core 2 duo and have been very confused as to which motherboard to get.

which chipset from intel will actually support 2 cards running at x16 each? I see alot of this 16x/4x and 8x/8x but do any actually do 16x/16x?

I have read tat the DFI lan party board has the ATI express 3200, which "claims" to run at 16x/16x but after reading new eggs specs it says 8x/8x.

I was interested in either the Asus P5B deluxe or P5W deluxe. one has the intel 975, the other the 965. Which works best with a crossfire setup? I have a x1950xtx right now and want to get another card in the future but want them to run at the full x16 for each.

Does a card not exist? Even ATI has certified motherboards which run at 8x/8x or 16x/4x?

Thanks!

 
the only board i know of with 16x/16x is the nF 680i. the RD600 has only 8x/8x.

To be fair though, the difference between the two isnt exactly massive, if any at all. 16x/16x is almost a gimick at this stage, there isnt realy any need for that much bandwidth, even for the 8800s!
 
so maybe to put this into easier terms...

Just because I have my boards running at 16x/4x doesn't mean one will stay the full 700mhz/1100mhz, and the other won't run at 175mhz/275mhz correct?

Do our cards even operate at the full 16x bandwidth?
 
16x/4x will have an impact -Anandtech did an article.
x8/x8 for most cards won't be a problem. However, if you are running very high res/aa etc. on dual 8800s another review site did find evidence of a loss of performance compared to X16/X16
 
Currently, 975x supports 8x/8x, while P965 supports 16x/4x. I think RD600 supports 8x/8x. So, the only true 16x/16x support is in the nF 680i boards.

As for performance, 16x/16x > 8x/8x > 16x/4x. However, the differences appear to be small for current generation graphics cards and are practically undetectable except at the highest resolutions. Of course this will eventually change, but for the time being even 16x/4x is probably acceptable.
 
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