Please take a look- what setting needs changing here?? soo grainy

[eze49]

this appears as soon as i turn on detailed shadows, and gets worse with indirect illumination on. ive been reading through the manual and the forums but still don't know why this is happening its rendering out full res 300 ppi 4000x2425 i tried playing with the ray bounces, sampling, and shadow quality and still it looks like this.  at first i thought it was just realtime render not being able to catch up but this is how it came out fully rendered.  any recommendations?