Needs["CUDALink`"]

width=640;
height=480;
iconfig={width,height,1,0,1,6};
config={0.001,0.0,0.0,0.0,8.0,15.0,10.0,5.0};

camera={{2.0,2.0,2.0},{0.0,0.0,0.0}};
AppendTo[camera,Normalize[camera[[2]]-camera[[1]]]];
AppendTo[camera,0.75*Normalize[Cross[camera[[3]],{0.0,1.0,0.0}]]];
AppendTo[camera,0.75*Normalize[Cross[camera[[4]],camera[[3]]]]];

config=Join[{config,Flatten[camera]}];

pixelsMem=CUDAMemoryAllocate["Float",{height,width,3}]

srcf=FileNameJoin[{$CUDALinkPath,"SupportFiles","mandelbulb.cu"}]

mandelbulb=CUDAFunctionLoad[{srcf},"MandelbulbGPU",{{"Float",_,"Output"},{"Float",_,"Input"},{"Integer32",_,"Input"},"Integer32","Float","Float"},{16},"UnmangleCode"->False]

mandelbulb[pixelsMem,Flatten[config],iconfig,0,0.0,0.0,{width*height*3}]

pixels=CUDAMemoryGet[pixelsMem];

Image[pixels]