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8x vs 16x

post #1 of 17
Thread Starter 
How much of performance difference is there when you SLi using two full 16x slots or two 8x slots. I dont wanna buy another motherboard but am willing to buy another 8800GTS
    
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post #2 of 17
here:


http://www.tomshardware.com/2007/03/...sis/index.html

it doesnt exactly answer your question but it may help, its an interesting article nonetheless.
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post #3 of 17
no difference between 8x and 16x PCI-E

edit:little difference
    
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post #4 of 17
This brings up a question of my own. In SLi, is the interface bandwidth between the 2 cards shared or is it designated half and half?
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post #5 of 17
i saw a test somewhere where they did dual 8800gtx's in sli in both 8x and 16x... they got almost exactly the same results... top end graphics cards dont even fully utilize 8x yet
post #6 of 17
You need 16x for high resolution with SLI.
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post #7 of 17
For most cards, no difference, or very little. For DX10 cards it's noticeble. You'd be fine with the motherboard you have now, however, unless your CPU is running at 4.5ghz, the SLI config is going to stress the crap out of your CPU.
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post #8 of 17
Wow I had no idea that the difference between 4, 8, and 16x-PCIE was so close. My friend has one of those *inbetween* mobos with an AGP 8x and a PCI-E 4x, but hesitated on a PCI-e card because it was only a 4x slot. I'll definitely pass along this information, thanks!
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post #9 of 17
Quote:
Originally Posted by ThE_LoNe_RaNgE12 View Post
Wow I had no idea that the difference between 4, 8, and 16x-PCIE was so close. My friend has one of those *inbetween* mobos with an AGP 8x and a PCI-E 4x, but hesitated on a PCI-e card because it was only a 4x slot. I'll definitely pass along this information, thanks!
If it is a PCI-e 4x slot, it is 1/4 of the size of a regular slot. A PCI-e 16x card won't fit.
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post #10 of 17
Quote:
Originally Posted by Mootsfox View Post
If it is a PCI-e 4x slot, it is 1/4 of the size of a regular slot. A PCI-e 16x card won't fit.
o its a mobo with a 16x xlot with 4x bandwith

there is a BIG difference beween 4x and 8x
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