The i-GFX is an embedded CPU feature in the Entry workstation DT platform feature.
Therefore, such a platform must enable the i-GFX supported. However, some of our decision
to customers ordered powerful d-GFX instead of i-GFX. Meanwhile, the i-GFX power rail still
operational even i-GFX is not working (Fig. 1). Can we 100% disable the i-GFX power rail to
return the consumption? The answer is yes.
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INC, HP, "A MECHANISM TO SAVE MORE IDLE POWER FROM I-GFX POWER VR", Technical Disclosure Commons, (January 24, 2021)