more than one GPU

V-Ray V-Ray Common Off-topic
1

hello all

I am confused about the SLI bridge or putting more than one graphic card into my pc without it… nvidia writes that putting more than two GTX 1080 is not recommended.
well that’s ok, but do i need an SLI bridge? I thought new mainboards do not need it, so to say simply put serval graphic cards onto the mainborad is enough.

can someone explain it to me, please. I need the cards only for rendering and not for gaming.
I am confused because I saw pc with way more than two cards in it, and the largest SLI bridge is for four crads, so it doesn’t make sense to me…

thanks in advance for clarification and help.

best regrads
themaxxer

2

For rendering V-Ray on GPU you don’t need SLI.

I currently use 4 x GPU for rendering V-Ray GPU and intend building that up to 7 (on one motherboard).

3

For V-Ray GPU rendering, you don’t need SLI bridges. In fact, they might cause troubles for V-Ray GPU rendering. V-Ray GPU will automatically find all available GPU devices and will use all of them for rendering. If you want, you can manually pick which devices to be used from the V-Ray RT Render Devices Select settings tab in Max.

Best,
Blago.

4

the idea of using SLI wasn’t sharing the VRAM as well?

5

Not actually. NVLINK is for VRAM sharing.

Best,
Blago.