I have had lots of trouble trying to run Realbench (latest version) in the past 6 months or so on various computers. Either luxmark.exe crashes or I get an error message about OpenCL.dll not being found. This happens even at stock default frequencies and voltages so the issue is not instability.
I'm pretty sure I have found the cure. It has worked for me reliably on with AMD video cards and also Intel IGP.
The fix is to install the Open CL SDK for the GPU brand. They are available for Intel, Nvidia and AMD. I don't know how it fixes things but it does.
