I made mistake in my previous cureent measurement. There was no current reduction on the 5V line. I was trying to do two tests at the same time - I put a battery as buffer in the wrong position causing erronous reading.
The following pix help understand the actual current consumption.
GA H55M-UD2H defalut BIOS (9x133) (No chip was removed)
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GA H55M-UD2H BIOS optimised in CMP
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GA H55M-UD2H BIOS optimised CMP@96K
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GA H55M-(D)2H BIOS optimised CMP@96K (2 video, 1 sound, 1 network, 1 IDE chip were removed)
Now it is clear that removal of the chips will reduce 12V and 3.3V current consumption.
Further measurement confirmed that the 2 DVI-HDMI convertors are actually driven by the 3.3V directly from the ATX P24(I thought it would be easy to cut off the supply by desoldering the small chokes which turn out to be capacitors), the sound chip via a regulator from 12V direct and the network chip also by 3.3V by not directly from the ATX P24.
