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post #451 of 1100
maybe they make more than 1 mosfet line.


Similar to Power supplies. Kinda like how Cooler master makes some good power supplies, and some others that are total crap.
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post #452 of 1100
Thread Starter 
Quote:
Originally Posted by reflex99;12783528 
maybe they make more than 1 mosfet line.


Similar to Power supplies. Kinda like how Cooler master makes some good power supplies, and some others that are total crap.

Makes sense actually. Some HEC units are actually quite decent (well, better than others) but all of them are still pretty much bad, and the majority are really really bad.
post #453 of 1100
Quote:
Originally Posted by Volvo;12777580 
You really want to know?

Acer is ECS.

http://www.hardwaresecrets.com/printpage/ECS-Factory-Tour-in-ShenZhen-China/169

eek.gif I felt this like a hit in my useless head smil3dbd4e4c2e742.gif


Regarding the Nikos mosfets i can say that we all know that there is a market of fakes in this industry so there may be fake/d Nikos overthere .It s quite easy to rename ,rebadge etc.
On the other hand maybe ,maybe ,there are newer Nikos manufactured from real silicon smile.gif A young brand like nikosem may be evolving.

My MSI KT3 Ultra2 lasted for 8 years beeing used like 14 hours a day in heavy usage ( as the Athlon Barton-s could ) and had not a single Nikos MOSFET on it smile.gif

My humble opinion is that Nikos may be ok in areas were high ameperages are not needed , like driving a fan or something or some small chip.

I was astonished on how the VRM area heats up on my MSI 790XT-G45 compared to the Gigabyte 770-UD3 ,with the same "killer" CPU ,720 BE at stock smile.gif

Maybe MSI engineers calculated the VRM-s for some other MOSFET characteristics and some moron in a factory decided to cut cost buy using those.

If you look at this AMD boards made by MSI you will observe they are also use ON transistors instead of Nikos or along them ,depending on the batch.

I have seen no ON mosfets burned on MSI mobos untill now or nobody that had them burned had not posted a picture.

So what gives if you only see Nikos burned in VRM areas ?!
They must be the culprit.

LE: I ve heard that capacitive loads on switching power supplyes outputs can overload them as well.
Maybe MSI engineers use to compensate vdroop "biger" capacitors on the VRM outputs ,
instead of using more VRM stages or a better quality VRM controller.
This may be one of the reasons they ve started using Hi-C cap ,the Tantalum ones.This capacitors have different characteristics and may help in avoiding overload when big capacitance is used.

Also mosfets have a frequency at which they switch properly.If this frequency is too high engineered so to compensate the lack of VRM phases ,they might start oscilating and make more heat.
Maybe this Nikos don t do well at specific frequencies ,like the ones MSI uses for their VRM controllers.
Edited by Dromihetes - 3/18/11 at 5:59pm
   
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post #454 of 1100
But there is the possibility that they have another model. Maybe that other model is very reliable, and thus we don't see any failures here.

Similar to how Toyota makes more than one car.
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post #455 of 1100
Quote:
Originally Posted by reflex99;12784188 
But there is the possibility that they have another model. Maybe that other model is very reliable, and thus we don't see any failures here.

Similar to how Toyota makes more than one car.

In any case ,MSI quality control should of spoted this issues untill now.
If it didn t and they will continue producing this boards ,as they are doing now ,is bad for their bussines not for us.
I m extremelly curious on what will they do with the AM3+ boards.
Good brands usually react fast in such situations.
Gigabyte had issues in 2007-2008 and they seem to have fixed the problems.
I have hopes from MSI.
Time will tell.

A curious and skilled hardmodder could take a MSI Nikos mobo and replace the VRM MOSFETS with something better , just for experimenting.
I m sure the boards will behave better in such situation.
   
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post #456 of 1100
Thread Starter 
Gigabyte fixed their issues moving to ultra durable 3 - an all new low RDS (on) design. Some boards recycle the old VRM system though and they're pretty bad.
post #457 of 1100
Or everyone could just be nice little manufacturers and use Infineon mosfets so we don't have these problems. wink.gif
post #458 of 1100
Quote:
Originally Posted by Phaedrus2129;12784625 
Or everyone could just be nice little manufacturers and use Infineon mosfets so we don't have these problems. wink.gif

I would be happy with Fairchild ,National Semiconductor ,Rohm or even ST MOSFETS smile.gif
But reducing costs is the main concern for this guys ,not customer satisfaction.
If this boards last to much you would stop buying new ones and they wouldn t want that smile.gif
If we would buy mobos dailly they would be more than happy. smile.gif
   
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post #459 of 1100
Quote:
Originally Posted by xd_1771;12457372 
Have any mosfet heatsinks on their sixor? Cheapo case makes me think warm ambient temperature and little airflow. To begin with, tower cooler + 125W processor + unheatsinked 4+1 = no air to mosfets = no way to radiate/move heat = overheat = omg I'm on fire! Not only that, the VRMs on the 785GM-US2H aren't of as good quality. There's one blow-up situation involving that board in my horror stories list, an x3 720 (95W stock TDP) at 1.6V and above blew it. Older Gigabyte boards before the recent ones with low RDS, Ultra Durable 3 and all didn't really hold up well without mosfet cooling.

no heatsinks on mosfets, and i usually play games with the case open to get better temps, so far i have

965be c6 3817
2400nb
stock vcore, stock vnb

still no blow up XD, i wanted to oc more by upping the vcore, but if 99% of people says NO you will destroy your country with that mobo, then i guess i should be quiet
Edited by sixor - 3/19/11 at 8:11am
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post #460 of 1100
Thread Starter 
sixor: I say bad idea. the 785GM-US2H has the same MOSFET designs Gigabyte used from 2007-2008 that were rather unreliable and failed quite often. Since you're also on a 125W processor and tower cooler which means that the entire VRM area isn't even getting any airflow, I suggest returning to stock right now or adding MOSFET sinks before ANY overclocking.
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