pci-e confusion

[jgp4]

Hi need a bit of advice about pci-express gfx cards.

I'm looking to upgrade to an AM2 SLi board and put 2 7900GSs in SLi, however I've read that NF570 boards pci-e slots only have 8 pci-e lanes when in SLi

My question is - do current cards including the 8800GTX make use of all 16 lanes or will 8 do just as well.

I'd rather not spend more on a 590 board but I also dont want my cards to lack bandwidth.

Thanks

 

[apt403]

Dont worry, 8x is fine. There wont be any noticable difference between a 16x lane and an 8x lane.

 

[uri]

You can see the difference here:

http://www.tomshardware.com/2007/03/27/pci_express_scaling_analysis/

 

[apt403]

There is a difference, but you wont notice the difference because its so small. Its to bad that article didnt include more games, COD and Quake are hardly sufficent.

 

[emp]

IF you haven't both those cards and mobo yet, you'd be better off getting an 8800GTS 320mb and a cheaper mobo than an SLI configuration, in terms of performance.