Sapphire 7970 Wont power on?

[FAQdaworld]

I have a weird situation with a mining rig and I'd like the guru's to help if they can

MB : ASUS M4N98td EVO
PSU: Corsair 750
GFX Sapphire 7970 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814202008

This rig is one of my primary miners and has been running perfectly fine for quite some time. It hasn't been overheating, and temps have been relatively stable at 74 deg c for quite some time.

This morning I checked on my workers and noticed that this system was down, which is unusual, this system in particular tends to be the most stable of the bunch. It was actually a fairly cool morning, so I know that it's not possible that the machine was overheating.

When I physically checked on the machine I saw it was powered down, hit the power switch and nothing happens :\

Pulled everything off of the mb and put it on a test bench. Nothing connected but the ram, cpu, monitor, and this one card. Jump the power, and still nothing :\

Put another gfx card in there and it powers right up and goes into my mining OS no problem. Put the original card back in and same thing wont power up at all.

Tried using the working card in primary slot and the questionable card in secondary, and still wont power up... Also tried with risers on the questionable card. If the riser ISNT powered, it will boot up, if the riser is powered I have the same problem (no power)
I assume that there must be a short in there somewhere but does anyone have any bright ideas or things I should try?

I cant RMA the card at this point

 

[Makaveli]

I have a weird situation with a mining rig and I'd like the guru's to help if they can

MB : ASUS M4N98td EVO
PSU: Corsair 750
GFX Sapphire 7970 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814202008

This rig is one of my primary miners and has been running perfectly fine for quite some time. It hasn't been overheating, and temps have been relatively stable at 74 deg c for quite some time.

This morning I checked on my workers and noticed that this system was down, which is unusual, this system in particular tends to be the most stable of the bunch. It was actually a fairly cool morning, so I know that it's not possible that the machine was overheating.

When I physically checked on the machine I saw it was powered down, hit the power switch and nothing happens :\

Pulled everything off of the mb and put it on a test bench. Nothing connected but the ram, cpu, monitor, and this one card. Jump the power, and still nothing :\

Put another gfx card in there and it powers right up and goes into my mining OS no problem. Put the original card back in and same thing wont power up at all.

Tried using the working card in primary slot and the questionable card in secondary, and still wont power up... Also tried with risers on the questionable card. If the riser ISNT powered, it will boot up, if the riser is powered I have the same problem (no power)
I assume that there must be a short in there somewhere but does anyone have any bright ideas or things I should try?

I cant RMA the card at this point

74c isn't bad but what were your VRM temps while mining?

 

[SlickR12345]

Usually the cooler breaks and thus the card won't power up, its happened to me on 2 gpu's.

That is all I can thunk of, else your card is broken and that's it.

 

[OCGuy]

Running your card at a constant 100% load for a long period of time is going to cause failures. Not all of them can easily be attributed to temperature.

 

[FAQdaworld]

Usually the cooler breaks and thus the card won't power up, its happened to me on 2 gpu's.

That is all I can thunk of, else your card is broken and that's it.

I have verified the cooler is working (prolly should have mentioned that), when I hook up the card with a pcie 1x riser that ISNT powered, the fans on the card will run, but the card isnt recognized (somewhat of a known problem on the board, need to do the jumper thing)

Not sure on the vrm temps, they should have been OK, i had a massive box fan blowing on the sucker so the cards were kept at a nice temperature along with being on risers.

I havent seen any magic smoke marks so I'm not willing o give up on the card yet :'(

EDIT

And when I saw it wont power on, I mean the whole computer wont power on, No cpu fan / chassis fan... Nothing. Just sits there and judges me silently

 

[UaVaj]

this problem must be common with amd? had your exact problem same problem. except my gpu are all 290x. motherboard is a z77.

quad 16x plx motherboard went dead so had to rma.

in the meantime - want to test out crippled quad xfirex - so for the heck of it. gpu1 on 1x w/ riser slot 1. gpu 2 on 16x motherboard slot 2/3. gpu 3 on 16x motherboard slot 5/6. gpu 4 on 1x w/ riser slot 7.

motherboard refuse to respond. absolutely nothing worked. reseat cpu. no joy. reseat each gpu. no joy. remove each gpu at a time. no joy. remove all gpu. no joy. bios reset. no joy. what got it going was removing the psu from the motherboard.

with only two gpu on installed on both of the 16x slot (standard crossfirex). working normally.

something in this x4 multi gpu configuration caused the motherboard to hard lock. if anyone know what the culprit is. do tell.

 

[UaVaj]

did not give up right away.

another annomally. during the second attempt. somehow it worked - though very buggy.

slot 1 w/ 1x riser. this gpu's fan would be running at full speed during post and boot. that gpu had to be removed. never got to windows with this gpu installed. something was clearly wrong.

slot 2/3 w/ 16x slot. this gpu always worked.

slot 5/6 w/ 16x slot. this gpu is recongnize but driver refuse to load in tri-firex. crossfirex is fine.

slot 7 w/ 1x riser. no problem during post or boot but window refuse to recoginze this gpu as a 290x.

 

[FAQdaworld]

Took a buddies recommendation and attempted the ole reflow oven trick. Now I can boot with the card installed but isnt recognized. May attempt to see if its recognized for a bios reflash at some point here in the next few days but I spent more then enough time troubleshooting this rig today