jackdual

Hi Chris, Did u use AMD Catalyst or Bootcamp driver to get RT working? Regarding the RT performance, I havent got a chance to test it with AMD cards so I cant really tell. However, a GTX780Ti (2880 Cores @ 870Mhz on VrayRT CUDA) is 15-20 times faster than an i7 4930k (6 Cores @ 3.5Ghz on VrayRT OpenCL). The D700 each holds 2048 Cores @ 850Mhz, but it cannot use CUDA. I couldnt test them on RT OpenCL due to driver issue. From my personal experience using VrayRT, I dont think it is ready to be a production render yet. For example, if you got a simple scene with 3-4 lights, few reflection, refraction and such. then RT is perfect. But if you put in ~10 lights, and lots of materials like glass, gems, water. You will start to see lots of noise and white pixels that will take hell of a long time to render, and there will still be noise and several white spots left on your final image. To get production quality at 15-20x speed on a complex scene, you will need several GPUs working together. I only use RT to preview lights placement and materials. Also to render out background objects as I dont need them to be clear. It does speed up my workflow alot. And what do u mean by 1500x650 and 4000x2000? Did u mean image resolution?

I installed windows 8.1 using Bootcamp assistant that comes with the mac, when you open it to create windows 8 install disk, it has an option to "download the latest windows support software from apple", which is checked by default. The graphics card driver is included in the download

I tested RT on bootcamp (Windows 8.1) with both Apple bootcamp driver and AMD catalyst, neither work for me. By default Vray openCL device check the CPU and both GPUs, but if I uncheck the CPU, leaving only GPUs to render it crashed instantly. Have you tried unchecking the CPU and see how it goes? As for crossfire, I believe it doesn't have any impact on Vray RT performance as you are able to use one or both GPUs regardless. Btw, the performance on 3Ds max viewport using AMD catalyst is horrible, not sure if I've done anything wrong though.

Hi Chris, VrayRT works on the nMP under bootcamp but unfortunately it will only use the CPU to render. As soon as u switch to the GPU it will crash. At the moment I think only Lux render and Indigo work on those GPUs.

So I came across this demo of Firepro W9100 on Vray RT using OpenCL It seems the speed is comparable with CUDA but that is one pricey card though. Can anyone confirm if this can be achieved with Radeon 79xx or Firepro W series? Since they are not Hawaii card like the W9100.

Thanks Jeff for the test, the result seems positive. I guess i'll be installing windows via bootcamp to use Max. Are u able to choose which GPU for OpenCL?, because I want to use just 1 GPU for Active shade and the other for viewport and leave the CPU free

Hi guys, I work as a 3d artist and thinking of buying the new Mac Pro but one thing that bothers me is the dual AMD cards. I work alot with Vray RT, which I heard currently does not support AMD hardware. Has any one tested the new Mac Pro with the lastest Vray RT OpenCL? If you have please confirm to me if it works or not. Thank you very much guys