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Chokes, VRMs, Mosfets and the million dollar question (DSL = FAIL)

post #1 of 12
Thread Starter 
Hello OCN,

Yes, that 56k fail is a shameless attempt to get you to read my thread. Though there are 2 images that are each 10 megapixels further down. To view the larger image just click either image to take you to the high res version.

I have a few questions about my ASUS P6X58D-e motherboard and the part I received via advanced RMA. I ended up figuring out that my old board was indeed not defective, but just needed cleaner power, and my voltage where the psu was plugged into the wall could vary from 114v-121v, through my UPS it only dips down to 118v. They are both identical models, yet I could see a few small differences so I decided to take a few pictures (more to follow) and see if you guys could help me determine which one uses better components.

The first area of difference is right to the side of the CPU towards the RAM. There are 6 solder points on the replacement and 12 on the new. The old one uses 1ROE VRMs (I think that's what those are) next to the RAM and the new one uses 1RO. The MOSFETS next to the CPU are different.

I'm posting very high res pictures because with them you can read the markings on individual parts.

You can tell the old from the new by the three blue ram slots. The latches are open on the old one.

I also think that the design of the new one, while not different enough to require a revision change, may be better because they learned how to make the board more cheaply after some time. But that's not based on any scientific analysis, which is what I need from you guys.


Edited by jadawgis732 - 1/2/11 at 2:26pm
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post #2 of 12
I can't tell what is changed, if you could circle it that woudl be a help. and what is your question? Did they cheap out or did they make it better? What?

WHY the boxes next to the capcacitors are core chokes. The MOSFETs are under the heatsinks.

FYI your PSU shoudl be able to handle the change in AC voltage, as now PSUs are able to handle variable AC voltage, you don't even need to change them from 120v to 220v anymore.
Edited by Sin0822 - 1/1/11 at 8:23pm
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post #3 of 12
id say that they would be both the same. they have just discovered that one of the Capacitors are not needed. and changed a few other parts because of it. id however take an educated guess that since the top image is apparently an older board (first of the ones produced) then that would be the better board as they would have used more rigged parts while testing was done.
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post #4 of 12
Quote:
Originally Posted by Sin0822 View Post

WHY the boxes next to the capcacitors are core chokes. The MOSFETs are under the heatsinks.
Yup. To be technical, "chokes" are just inductors.

And the VRM is the entire array of MOSFETs/inductors/capacitors in the power system. There is no "VRMs", as there is only one module thus no plural...this is a very common mistake.
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post #5 of 12
well there can be a small chip that can be called a vrm
like on video cards they use them to regulate fluctuations of the 12v from both pci-e slot and connector.

FYI look up the chokes number with their spec, idk how many amps those chokes are rated for but that can tell you how well the perform.

But yes to be technical Voltage Regulator Module is an array of MOSFETs, Capcitor(s), Drivers, Inductors/Chokes, and the PWM.
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post #6 of 12
Thread Starter 
Okay, let me get back to you guys in a few minutes with better (multiple angles) pics. I meant to say that I thought the older model was better because they used better components for those models.
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post #7 of 12
Thread Starter 
okay this is real 56k fail.
old board





new board



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post #8 of 12
holy crap man I am on DSL at the office, and holy crap, you don't need to do that, have you ever used the program called paint, with a red box over what youa re trying to show us, then crop it and save it as a new image.

Don't worry the power devliery is not your OCing problem. If you are BLCK limited then its board/cpu problem. You are not voltage limited b/c they changed a few components.

The PSU is supposed to supply steady 12v voltage, even if the AC input is fluctuating from 110-120.
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post #9 of 12
ok this seroiusly make me want to download porn instead... took me like 10 minutes to load those pictures..
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post #10 of 12
Whether its 1R0E or 1R0, the rating is still 1uH (microhenry)
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