I recently installed the Google NIK collection of plugins for Lighroom. All the plugins seem to work fine except that Vivesa 2 is extremely slow in response time. When a control point is placed on an image it can take as long as 5 seconds for the screen to refresh. I've been searching the internet for 2 days and haven't found anything helpful. The settings tab in Vivesa doesn't have anything to change relating to GPU performance. I have the latest video card drivers installed. My system details are as follows:
software: Adobe Lightroom Version 5.4
hardware: Dell XPS8300 with the i7-2600 CPU @ 3.4GHz with 16GB of RAM
OS: Windows 7 Pro with SP1 Build 7601
video card: ATI Radeon HD 5700 Series with 1GB of onboard memory
Anyone experiencing similar issues or have any suggestions?