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A question about power delivery concerning iGPU VRM

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Jan 13, 2016
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System Name Warranty Void Mk.IV
Processor AMD Ryzen 5 5600
Motherboard Asus X470-I Strix
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Mouse Logitech G302/G502/G203 / RPG: Corsair Nightsword
Keyboard CM Masterkeys Pro M / Asus Sagaris GK100
VR HMD Oculus Rift S
Software Windows 10 Pro x64 - LTSB
So I have been wondering for months and haven't even found an answer on google. If the iGPU is disabled/not used or whatever, does the VRM that is meant for iGPU do anything for the CPU? Is the VRM dedicated to the iGPU. Is the top section meant for expansion slots, or does everything just depend on the particular motherboard?

I'm curious is there another reason (other than thermal management) why is there a left and top section of VRM aligned even though you could fit those 4 phases (for example) on one side only without any problems, but one phase might be left out on the top instead of being soldered near the others.
 
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