PCI express discussion here

rchi84

In the zone
Based on the direction the discussion took in the batman thread, let us discuss the effects of pci express 2.0 x4 x8 x16 on single and multi card setups on both Intel and amd platforms here. Fire away guys :)

let me start things off. Found an old article on tomshardware that deals with this topic:

PCI Express Lane scaling on a GTX 480

Found two more articles on Techpower up too:

Techpowerup Radeon 5870 Pci Express Scaling

and

Techpowerup Gtx 480 Pci Express scaling
 
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vickybat

I am the night...I am...
Re: Batman: Arkham City

@vickybat dude will your mobo run the x16 slot at full speed when you plug a card in the x4 slot? My mobo will default to dual x4 if I plug in a card in the x4 slot. Which is why I am not going for hybrid physx with a used 8800gt that my friend gifted me...

Yes here there won't be any sli or crossfire. The primary card will still use 16 lanes and the secondary physx card will utilize 4 lanes at max. Even if i crossfire, the end result will be same as described above.:)
 
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