Vegas 11 Pro , AMD R9-290x Windows 10 with AMD 1045T processor and 8gb RAM . Results are inconsistent at best. I'm using software to monitor GPU utilization during rendering and it might start at 20% then drop to zero for several seconds then go to 5% and then back to zero.... Just bounces around resulting in only about 10% render time savings over using CPU only. I really don't think this video board renders any faster than my older AMD 6870.
Summary, I think my money would have been better spent upgrading my mother board and processor.
Summary, I think my money would have been better spent upgrading my mother board and processor.