Retroarch - Stuttering audio and video????

[Frank Drebin]

PC - i5 3470 @ 3.2 ghz, windows 7, 4GB DDR3 ram.  Small form factor case w-factory PSU and GPU
 

 
I've never been able to get these emulators (SNES, Genesis, Game Gear, NES, SMS, N64, etc) to run properly.  The sound and video is jerky and crackly.  Some things I've tried are:
 
VSync on and off (only works with it on)
Audio Latency up all the way to 256
Shaders on and off, (no difference)
Adjust screen frequency (my screen feedback is anywhere from 30hz to 62 hz depending on the time?) (no difference)
Hard Sync (GPU?) only works with it off
 
So I should have enough horsepower to run SNES, NES, Genesis, etc on retroarch with no crackling?
 
Any easy fixes out there?

[Frank Drebin]

Updated video driver and all is good now, for anyone who is searching.