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my 890fx-gd70 got cooked - Page 6

post #51 of 60
Quote:
Originally Posted by Veranor View Post
So lets say its a cooling issue then.

If someone made an aftermarket heatsink for the GD70, I would be a customer. I don't want to have to buy a new board for something that should have been right to begin with, unless MSI is willing to RMA (I don't think so). And I don't want a watercooled one. I only have one loop right now.

Now... the million dollar aspect of this: if the MOSFET chips are arranged in such a way that the middle ones are lower than the outer ones, MSI should issue an unconditional recall IMMEDIATELY. That is a huge defect, one that would give people with stock settings a run for their money as well. Even if you don't see it... chances are your mobo won't last as long as the ASUS or Gigabyte equivalent.

Just an opinion.
That's a very good point. What I noticed on my 790FX board was the heatsink not being milled properly. The board was actually flat (as flat as any good PC board I've seen). I don't think MSI's heatsink maker actually thought about the tolerances, so the heatsink sat cocked on my NB, as well as on the VRM section. The heatsink itself is plenty big. I've looked for aftermarket heatsinks, and if a Thermalright can be found, it could be used. The copper Enzotech ones won't fit (inverted mounting holes), but work well for the Gigabyte and Asus boards. I found this out as I wanted to take the MSI heatsink and put it on my Gigabyte board.

I clamped off the heat pipe, carefully cut off the NB heatsink and pulled it away, and then recrimped the heatpipe and cut/soldered it shut. The upside is if you want to hack the MSI heatsink it'll make contact with the VRMs alone, so it should sit correctly. The downside is losing the NB heatsink as it's a lost cause. The SB heatsink can be saved in the same way; I crimped, cut, and soldered it. It's a shame I can't use them, especially after the work.


But, with a little time, effort, and hacksaw skills, I'm pretty sure some very effective heatsinks can be created to replace or modify the stock setup. I'm sure milling the bottom to fit properly would be an even better approach. But MSI dropped the ball in this case, and I do consider the stock heatsink (albeit very svelty looking) defective.

For my new mobo I'm probably going to spring for an Enzotech VRM heatsink, and cut my own NB and SB sinks from old heatsinks I have lying around (K7 and 478 primarily). I'm also hoping to modify a Phenom2 cooler to fit my 5850, although that is still in pipe-dream phase.
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post #52 of 60
i aint had any problems yet... keyword YET. lol.
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post #53 of 60
I have a friend who bought the 790 version, and he is also having voltage/stability issues after a few months of owning the board. I'm starting to think the failure rate on these is akin to the old "Deathstar."
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post #54 of 60
i know this is an old thread but i thought i would share...
My 790 FX-GD70 was fine with my overcolcked 965BE for nearly 12 months.

4 days before warranty was up i purchased a 1090T, and suprise suprise, the board died within 2 hrs. I had already changed the TIM under the heatsink.

Took the board back to MSI distributor here in Sydney OZ, and they replaced it on the spot.

The replacement board also died, but lasted longer than the other one. It took about 4hrs of prime testing at 4.1Ghz

Took that board back to MSI and they replaced it again on the spot.
Will not be using it this time. Going to sell it on ebay.

Now using a Asus M4A89TD Pro/USB3 and running @ 4.2Ghz no sweat...

cheers
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post #55 of 60
I have the msi 790fx-gd70 for about a year now. last week I put a 1090T in and I had a stable oc at 4.0 with multi of 20 at cpuvdd at 1.43 and a cpu nb 3000 at a 1.35v only had it there today did about 20 mins on prime no problems but since I read this post i turned it all to stock. Not sure If I want to take my chance But for a note I was using cpu vdd and cpu nd vdd to adjust the voltages my temps never went above 46c on my cpu and everything else was below 50c I think Not sure what temp on hw monitor is the nb
Edited by ussoldier_1984 - 12/13/10 at 10:22am
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post #56 of 60
haha in the phone with msi tech support they know nothing of this issue lol
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post #57 of 60
Quote:
Originally Posted by ussoldier_1984 View Post
haha in the phone with msi tech support they know nothing of this issue lol
They're lying if they say they don't know anything about their 790/890 boards frying like that. Not only have they been called hundreds or maybe even thousands of times about it, but they've also received numerous e-mails about it, as well as feedback about it left on their products on websites such as tigerdirect and newegg. Personally, I lost count of how many times I've called or e-mailed them.

I also left "buyer beware" feedback on the 890fx on newegg, after two of them fried the MOSFETs under the drMOS heatsink either out of the box or when any core voltage was added. Here's my thread that I typed up explaining what I went through, in hopes that others would notice and post their stories.

http://www.overclock.net/amd-motherb...90fx-gd70.html

The MSI section editors here were going to link that thread to MSI to again remind them that there is something seriously wrong with their boards and/or their quality control. Not sure if that's been done yet, but feel free to post your story...the thread was initially meant for 890fx owners but apparently the 790fx has been suffering the same issues.
 
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post #58 of 60
Ok after reading all of this what do I need to watch out for so my 790fx board does not die? I have the 1090T. Am I looking to keep the nb under a certain temp? Is it the heatsink on the nb not seated correctly? and how would I tell if mine is seated correctly? Too much voltage going to the cpu? what is everyones cause of death on their board, so in the meantime untill I buy a new one I know what to watch out for?
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post #59 of 60
Quote:
Originally Posted by ussoldier_1984 View Post
Ok after reading all of this what do I need to watch out for so my 790fx board does not die? I have the 1090T. Am I looking to keep the nb under a certain temp? Is it the heatsink on the nb not seated correctly? and how would I tell if mine is seated correctly? Too much voltage going to the cpu? what is everyones cause of death on their board, so in the meantime untill I buy a new one I know what to watch out for?
I've never personally owned the 790fx so I can't really help you in that specific area, but I do recall someone in my thread saying the 890fx is pretty much a 790fx with an upgraded chipset.

Anyways, so far everything said about the flaw(s) with this board(890fx)...has been mostly speculation. We can only assume, based on the evidence thus far, that it is the MOSFETs crapping out...but no one really knows how or why yet. Some say the heatsink doesn't properly contact everything it should, some say the MOSFETs are of poor quality, etc. No specific PSU/CPU/other component has been the cause as this has happened to people with all sorts of different components and processors(x4 and x6). It also isn't always BIOS setting changes that cause it...some of these boards fry right out of the box with default BIOS settings.

With that said, I don't think there's really any way to guarantee you won't have this problem or even know when to expect it. I don't think anyone has really bothered to take the time to tinker with the heatsink or anything like that, most everyone I've come across so far did the same thing I did...gave up on MSI and switched to another brand.

All I can really tell you is this...these boards are hit or miss. Personally, I feel it's not worth the risk...so if returning and/or exchanging the board is an option, I'd go that route and not worry about it anymore. It's not any fun building a system only to end up sitting there wondering when/if the MB is going to crap the bed.
Edited by johnny.dot.exe - 12/13/10 at 7:09pm
 
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post #60 of 60
I don't have the option to return my board. I have had it for over a year now actually a year this month. So I guess its just go with it untill it dies on me. I think Im gonna take out my motherboard and see what the heatsink looks like (if its making contact with everything its supposed to) Im assuming that since I have been running this board for a year I have a good one.
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