45% + 1.4v = 2v ...I dont think you have anything to worry about..Your screeny doesnt show any OCP value that I can see...am I missing something? The only value I can spot is your GPUv...which says its at 1.12v..a long ways from the 1.4v you stated...

OCP works off of hysteresis ...so changing VID bumps OCP...but with these Voltera IC's it appears that VID does NOT change..only GPUv..so VID/OCP limit stays the same..Have you tried to see if the OCP mod for the 5870 is the same as your GPU..?