I have both entries enabled - not sure if that's correct but the results are good
But what about my question, you have 'change PEPG to GFX0' disabled? Do you have it enabled now beside 'change GFX0 to IGPU'? I mean, have you both entries enabled or just 'change GFX0 to IGPU' and the other disabled?
can you screenshot your bios page where your graphics display options are?