Comments

john_dennis wrote on 2/7/2012, 7:13 PM
People on the forum have reported using SLI to no advantage at the current state of the Vegas Pro, video drivers, etc. Search for past posts.
FrigidNDEditing wrote on 2/7/2012, 8:58 PM
Only one GPU is useable at a time SLI or not, it only gives you the benefit of a single card. So if you are going to do multiple cards, get at least one that is a beast for Vegas and various other GPU tools, and the other can just drive displays etc...

Dave

(I have dual GTX260's and only one can be used at a time in Vegas, but I have 3D animation tools that scale almost seamlessly with cuda so it's still of some benefit to have multiple in my case.)
Steve Mann wrote on 2/7/2012, 11:48 PM
To amplify what Dave was saying. Vegas can display on as many displays your PC supports. A Windows PC can support as many display adapters you can plug into the motherboard. (I've seen one gaming system running ten displays).

My advice is that your display adapters should all be the same. At least the same manufacturer. This way windows only has to install one driver. If you install different manufacturer's display adapters, you run the risk of having incompatible drivers.

Vegas will only use the CUDA cores from one GPU for preview and encoding. (What Dave said).