question about Pcie

[ghiom3d]

Hello,

When i put only 1 CGcard inside my box, pcie is working in 16Xmode.
If i put 2 cg cards, the 2 cards are working in pcie 8x mode.

So, here is my question :

Is it better to distributed rendering : 1 box with a 480GT in Pcie16x + An other with a 280GT in PCie16X
Or is it better to put the 2 cards ( 480 + 280 ) inside the same Box but with Pcie 8X only ?

thanks to share your knowledges

[freiformgestaltung02]

Hello ghiom3d,

I think, that problem is depending on your mainboard. On my mainboard (and on many others) the two (or even 7) pci ports were working with 16X. But I can`t tell you if there is a technical slowdown for the cuda cores, when connected to a pcie 8X.
- Sascha

[ghiom3d]

hello Sascha,

My Mainboard is a Dell . And if i plug more than 1 CG, the pcie is limitted to 8X .
So, that's the question !
Is 8x really less powerfull than 16X for 3DSMAX viewport and/or Cuda rendering ?
Can we really saw a difference or is it just a commercial benchmark thing when using CG cards like 480gt ?

Vlado or another technical master can answer this ?

[Dariusz Makowski (Dadal)]

I think u should ask that in Hardware section, but from other hand why wont u just test it urself?