Will Vegas 10e automatically take advantage of your graphics card (Cuda or OpenCL) to help with rendering, or is there a setting or render as that needs to be used.
it's only for rendering and ONLY with sony avc codec. in custom settings (in render as...) you've got 'encode mode' when you can pick between use CPU / use GPU or automatic. and that's it.
apparently vegas 11 will be using it more and not just for rendering but preview as well, but we'll see how it works when its out.
in my case, GPU-accelerated AVC rendering is not faster than CPU (i7 950 vs. GTX 460) with Vegas Pro 10.
With the tests I have made so time ago, the GPU was used only at 5-10% during rendering. It looks like there are some bottlenecks elsewhere in the processing chain (most likely memory transfers back and forth to the GPU?), because with GPU-accelerated plug-ins (as opposed to renderers) I could see a 10X difference between CPU and GPU.
The VP10 GPU accelerated rendering benefits are certainly much more visible with a less powerful CPU than an i7 950, but I could not have a chance to test this.