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What's damaged on my EAH5850?

post #1 of 9
Thread Starter 
Heya fellas.

I have an Asus EAH 5850 DirectCU gfx card that I got about a year ago for the specific purpose of BOINC (similar to Folding@Home).

It has an MCW80 waterblock, heatsinks on vregs and mem chips and has been running 1100 core for approx 6 months straight in my BOINC rig pretty much 24/7.

The card's temps, as listed in GPU-Z, never go over 45C, there is a 120mm fan blowing directly over the heatsinks on the gfx card and the case temp is always between 22C-35C (depending on season).

The other weekend I noticed the PC had froze - the screen connected to the Asus EAH5850 went to black screen with the monitor turned off, but the screen connected to my other gfx card was still displaying the desktop, although the it was frozen and I couldn't do anything but hard reboot. Also worth mentioning was that the PC still sounded as though it was running at load, with the fans on the second gfx card still at (what sounded like) 100% and the case temp showing high 20's, which is inline with the PC under load?

Anyhoo, I did the hard restart and everything booted up fine, and I could open afterburner and set the overclocks on the Asus EAH5850 back to 1100 core with no trouble, but as soon as I fired up my BOINC client it immediately frozen again.

So again I did another hard restart, but I left the clock speed at default and fired up my BOINC client and it ran without a freeze. The Asus EAH5850 has now been running 24/7 for the past week at stock clocks without a single freeze/crash.

I just finished doing a bunch of tests woth the Asus EAH5850 today, and it is weird. I can overclock it in afterburner and run Kombuster and it won't freeze or crash - but at the same overclock tested in Kombustor it will freeze while running BOINC? Not sure why, maybe Kombustor isn't loading the GPU as much?

Also, it seems as soon as I start adjusting the voltage it becomes unstable. What I mean by that, is if I run a stable overclock that doesn't need increased voltage (ie. 80 core) it will run BOINC without a freeze. But the moment I bump up the voltage, even if it is only 50mv, it will freeze while running BOINC

So the question after all that is what could be damaged on my gfx card that would cause this to occur?

What would allow my gfx card to run BOINC at clocks with stock voltage without a problem, but then cause my PC to freeze when running BOINC if I use an overclock that requires a bump in voltage?
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post #2 of 9
Kombustor isn't loading the VRam as much. Your VRam degraded. Happened to mine too, they don't handle extreme OC all that well
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post #3 of 9
Thread Starter 
Hmm, but I'm not overclocking the ram? When I run BOINC (like folding), memory speed is not as important as core clock speed.

When it was running 1100 core, mem was at default speed. Also, even if I drop mem speed down to 900, and overclock core, it still freezes.

Maybe the mem is just low budget crap in these cards and the mem has just failed from being run 24/7 for 6 months straight, even though they were still at stock speed?
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post #4 of 9
Quote:
Originally Posted by un-nefer View Post
Hmm, but I'm not overclocking the ram? When I run BOINC (like folding), memory speed is not as important as core clock speed.

When it was running 1100 core, mem was at default speed. Also, even if I drop mem speed down to 900, and overclock core, it still freezes.

Maybe the mem is just low budget crap in these cards and the mem has just failed from being run 24/7 for 6 months straight, even though they were still at stock speed?
Similar, but i had a problem with my 5770 it seemed the Vram degraded. I left out my pc repasted and left it for around 1 week. put it back in and i can use it again. try un doing the OC you have?
post #5 of 9
Quote:
Originally Posted by un-nefer View Post
Hmm, but I'm not overclocking the ram? When I run BOINC (like folding), memory speed is not as important as core clock speed.

When it was running 1100 core, mem was at default speed. Also, even if I drop mem speed down to 900, and overclock core, it still freezes.

Maybe the mem is just low budget crap in these cards and the mem has just failed from being run 24/7 for 6 months straight, even though they were still at stock speed?
I misunderstood your original post, I though the mem was at 1100
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post #6 of 9
Maybe the VRAM VRMs got any issue?
    
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post #7 of 9
Quote:
Originally Posted by jak3z View Post
Maybe the VRAM VRMs got any issue?
Does the 5850 have Vram VRMs? Even so, what would load them so much, they should be one of the least stressed components there
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post #8 of 9
Thread Starter 
Could it be the mem phase of the vrm is damaged/degraded? How can I check this?

Could I bench the card and read some points on the PCB to check if everything is within tollerences? If so, what points do I check?

Also, if it is a vrm issue, can I mod it some how to beef up the stock voltage without having to adjust the voltage through afterburner - maybe that'll allow a decent overclock again?

lastly, would baking it be of any use? Could it simply be a loose solder point from running the card at a high overclock 24/7 for 6 months straight?

Maybe the vrm or vregs were actually running hot even though GPU-Z was saying it wasn't and finally after 6 months of use it was enough for a solder joint to melt and for a pin or leg of something to work loose or not make full contact?
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Crimson Basilisk
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post #9 of 9
Quote:
Originally Posted by un-nefer View Post
Could it be the mem phase of the vrm is damaged/degraded? How can I check this?

Could I bench the card and read some points on the PCB to check if everything is within tollerences? If so, what points do I check?

Also, if it is a vrm issue, can I mod it some how to beef up the stock voltage without having to adjust the voltage through afterburner - maybe that'll allow a decent overclock again?

lastly, would baking it be of any use? Could it simply be a loose solder point from running the card at a high overclock 24/7 for 6 months straight?

Maybe the vrm or vregs were actually running hot even though GPU-Z was saying it wasn't and finally after 6 months of use it was enough for a solder joint to melt and for a pin or leg of something to work loose or not make full contact?
i see no point in baking, the card runs fine.
it does sound like maybe Vram/Vrm degration to me, not much you can really do to help it.
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Orange Angel
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