Upgrade Video Card, Choppy MPC-HC w/ 720p
A little background: Used the "Advanced MPC-HC Setup Guide" and had 1080p and 720p material streaming and playing locally flawlessly. The resolution is by default at 1920 x 1080 with a 23 Hz refresh rate. Basic system specs is are: i7, Radeon HD 7700, Windows 7.
With the upgraded video card, now I'm getting choppy 720p MKV playback in fullscreen mode (not in windowed), with default resolution (1920 x 1080, 23 Hz). I can eliminate the fullscreen stuttering if I manually change the resolution to 1280 x 720, 23 Hz, use madVR to change the resolution, or the settings under "image doubling" (with 1920 x 1080, 23 Hz).
Since the specs remained the same, with only a beefier graphics card, it should have been able to handle all the material fine as before. I'm a bit puzzled to why I'm getting lag now with 720p MKVs with the new video card, and identical settings.
Any input would be great. Thanks!