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gdrv off but no change in current consumption, 1394.....

Set gdrv off in device manager but there was no change in current consumption. 1394 was not present. Tried enabled in BIOS caused BSOD....

I made a mistake in my previous current measurement, there was acutally 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 from the ATX P24.


GA H55M-UD2H defalut BIOS (9x133) (device on, no chip was removed)




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GA H55M-UD2H BIOS optimised (9x100)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, 2 regulators 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.




Edits: 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10 06/13/10
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