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Have I been sold a dud card? 7970 crossfire issues. - Page 2

post #11 of 75
I used to get hands constantly with my HIS 7970. Thank god it died and i was able to buy a 290x.
post #12 of 75
Thread Starter 
Quote:
Originally Posted by Cyrious View Post

Yeah i see the problem. You did a piss poor job of greasing the chip, and the memory thermal pads are torn up rendering them useless.
When going bare die like that, spread it out and ensure the ENTIRE chip has an even layer of thermal grease on it. Only the center of the chip has thermal contact leaving the rest with an air gap, keeping the heat from conducting away. Clean the die, and spread the grease using a credit card or something similar.

As for the memory chips, you'll be needing new thermal pads for them.
I'll do as you've suggested and I hope it works, but from past experience I reckon you're flat wrong.

I will gladly eat my words though!

For reference, I didn't elect to go 'bare-die', it was already set up that way with a monstrous amount of paste in there as per normal factory spec. As for my "piss poor job", it's worked flawlessly on every other CPU and GPU I've dealt with, and I subscribe to the school of thought where a smooth layer will only end up with air bubbles in it as the HS presses on. Still, I'll try it your way smile.gif

Reassembling now. Would also love to see proof of torn thermal pads being ineffective. Ideal, certainly not, but "useless" is a big call.
Edited by savage1987 - 4/12/14 at 1:21am
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post #13 of 75
Thread Starter 
Tested it after reapplying TIM as per your suggestion Cyrious, and while there was a slight difference in temperature "ramp rate", it went up and up until it locked the system again. Admittedly I discovered I have completely run out of thermal pad material so I was forced to re-use the crap that's already on there.. I'm not sure if the cooler will seat correctly with paste on the memory chips.. although I have gone this way in the past I'd like to keep variables to a minimum. I'll try to find / get hold of some more pads and see how things go. I'm not sure a memory overheat would cause this particular issue but I suppose anything is possible!
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post #14 of 75
Quote:
Originally Posted by savage1987 View Post

Tested it after reapplying TIM as per your suggestion Cyrious, and while there was a slight difference in temperature "ramp rate", it went up and up until it locked the system again. Admittedly I discovered I have completely run out of thermal pad material so I was forced to re-use the crap that's already on there.. I'll try to find / get hold of some more and see how things go. I'm not sure a memory overheat would cause this particular issue but I suppose anything is possible!
So the temperatures are still climbing into the high 90s before a lockup occurs? Ok, that basically boils it down to "your heatsink is somehow broken/blocked and is not doing its job". At first i thought it was the fan acting up, but your GPU-Z screenshot has it spinning at 3600RPM which is more than adequate.

At this point that means if you want to continue using that card, you'll be needing a third party heatsink solution.
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post #15 of 75
Thread Starter 
Temp didn't even get into the 90s that time I'm pretty sure. Let me run it up again and see what happens...

HS certainly isn't blocked, fan certainly works, die contact is the only possible issue I can see along with those ****ty thermal pads. I think changing those needs to be my next step. I just want to make sure I completely rule out fixable things before attempting to RMA the card (if the guy can find the paperwork for it he seems happy enough to help out)
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post #16 of 75
Thread Starter 
Makes it to 81deg on the core before a black screen lock up that's only recoverable by manually restarting. Considering that card 2 load tests comfortably at 80degC for hours, I don't think that's normal
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post #17 of 75
Quote:
Originally Posted by savage1987 View Post

Makes it to 81deg on the core before a black screen lock up that's only recoverable by manually restarting. Considering that card 2 load tests comfortably at 80degC for hours, I don't think that's normal
Yep temps have been taken care of, but i think the problem now lies with the memory considering how bad the pads are. GDDR5 at those high clocks runs hot.
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post #18 of 75
Thread Starter 
Well I'm not sure core temp can be listed as OK at the moment, because look at the card 2 curve and compare it with the screenshot i'm going to attempt to get of card 1 now that I've changed the TIM again... it just rises and rises, no real sign that it's levelling out
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post #19 of 75
Quote:
Originally Posted by savage1987 View Post

Well I'm not sure core temp can be listed as OK at the moment, because look at the card 2 curve and compare it with the screenshot i'm going to attempt to get of card 1 now that I've changed the TIM again... it just rises and rises, no real sign that it's levelling out
Lol then again maybe not, at which point my previous verdict still stands: the card may need a third party heatsink to function properly.
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post #20 of 75
Thread Starter 
Thing is, it was apparently working fine in the last guy's rig..


Here's a screeny, took me 3 crashes to actually catch it lol




If I let it go another half second past that, it stops doing its job
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