I have the same CPU with 4 GB of RAM. However, I use a 450GTS video card for MadVR. Your 520 is best used with Red October Standard.
If you still see a stutter/judder, then it's likely a refresh rate issue.
This can happen when you try to play a 23.976 fps movie or 25 Hz TV show on a 60Hz Screen. Or, if 23.976 fps is displayed at 24 Hz, some people -including me- see the stutter every 42 seconds. There are fixes to these issues.
Tell us what the rest of your hardware configuration is, e.g. AV receiver, TV, projector etc.