benwaterson
Senior Member
Last Activity: 04-14-2024, 04:47 AM
Joined: 08-13-2008
Location: Milton Keynes
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3080ti is in those BIOS files... -
Re: GTX 980 Artifacting even after ram chip swap and core reflow
Lol...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
What concerns me is the above - chip has already been reballed to fix this issue - unless both the ram and core needed reballing to fix this and the chances of the only problem on both relating to one ram chip out of 8 chips seems unlikely...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
Ok, pulled the chip and some very suspect pads (no solder balls on them at all) - very flat dull - see attached image of which pads. Might have found the issue here!
All data lines apart from 2 VSS...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
Ok, freeze spray made no difference to either ram or core.
I am going to pull the ram chip again and double check connections using diode mode on multimeter (on chip and to the core).Leave a comment:
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Re: Software to analyze Video RAM faults on graphics cards?
Newer MATS in here 520.112
[url]https://drive.google.com/drive/folders/1qznuCurecU3vIRqde814UC6rNCE18xBt[/url]Re: Software to analyze Video RAM fa...NCE18xBt[/url]...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
Ordered some freeze spray - will report back when I receive it and test.Leave a comment:
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Re: Gigabyte Aorus 1080ti - card not initialising
More up to date info regarding testing of these [url]https://youtu.be/IBW5alE6K0w?t=345[/url]Re: Gigabyte Aorus 1080ti - card not...0w?t=345[/url]...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
Yeah, I will probably give that a go - good idea.
It's odd as only 1/2 the bits on the chip are failing MATS test (all bits fail as expected when chip was removed) which indicates more like a faulty ram chip or connections to the gpu than the gpu itself.
Found some good info from northwestrepair (good info in his discord too) - relates to Micron memory, but same principles apply to other GDDR5 / GDDR5X chips
Video : [url]https://youtu.be/IBW5alE6K0w?t=345[/url]
This...Last edited by piernov; 01-31-2023, 12:13 PM.Leave a comment:
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Re: Asus Gtx 1060 vram issue
Maybe look in my thread for advice (very similar issue) [url]https://www.badcaps.net/forum/showthread.php?t=107310[/url]Re: Asus Gtx 1060 vram issue<br /> ...t=107310[/url]Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
Ignore that comment - wasn't this card. I am also working on a 1080ti that I have replaced the core on!...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
either that, or the replacement ram chip i installed originally is bad also....Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
I had to rebuild one pad under the gpu core (not related to this ram chip, was for D0)
I am sure its that chip as when testing in mats with it removed (B0, 4th chip anticlockwise from the right) the errors increased and no errors on any other bank.
With a bad core i have generally seen errors on at least the full bank (B0 and B1 for example) or all memory banks.
I am leaning towards the final option of supporting caps/resistors being faulty - VMEM / VREF voltages did seem to be...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
Ok, got the new stencil and reball jig.
Reballed and reinstalled core - no change. Still errors on chip B0 (bits 15 to 31)
Good news is I didn't make it any worse. Reball process took about 45mins - chip came of clean. All good pads on PCB and chip with no oxidisation at all and all traces from that ram chip to the core looked good.
Just wondering if there is any relationship with the B1 chip that might affect this (that chip hasn't been touched)?Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
Decided to reball and reinstall ram (would have to do it anyway at some point). As it appeared there are no open connections to the core it made sense.
Still artefacting on test, failing bits now back to how it was originally - 15 to 31.
Only thing left to try now is core removal and reball etc (not confident this will fix the issue now though - I am just in this to learn more really and see if i can at least remove the core and reinstall back to how it is now).Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
While I wait for stencil etc i decided to remove the problematic ram chip again.
Running mats with it removed results in more artefacts and complete failure on B0 bank (as expected). Pascal cards and above will not display a picture with a faulty chip.
Whilst the chip is off i thought i would measure the voltage drop using diode mode on the multimeter of all the data lines. Looking for irregular readings or open circuit to diagnose any broken traces or abnormalities in the core.
...Leave a comment:
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Re: GTX 980 Artifacting even after ram chip swap and core reflow
It's been a while and decided to revisit this card.
After more testing with MATS and flexing the PCB slightly I can change the failing bits within MATS for that bank.
I am going to remove the core and reball it (and the ram chip) - waiting on a better reballing jig and stencil from aliexpress
p.s the core was glued to the PCB in all 4 corners - i removed the glue when reflowing it - preheated the board from below and used 45mm x 45mm BGA hot air nozzle from above - got it to temp...Last edited by benwaterson; 01-04-2023, 07:55 AM.Leave a comment:
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Modified RTX3000 series BIOS files with memory channels disabled
Hi All
I was looking for ways to disable memory channels in BIOS for a GTX 980 (found nothing) - however I did find a load for RTX3000 series cards - file name describes which memory channel is disabled and for which card - maybe of use to someone with a card that has a bad memory controller (and ram chip is good) to get the card running again with slightly less RAM.
They look to be from Gigabyte cards originally....Last edited by benwaterson; 01-02-2023, 12:45 PM. -
GTX 980 Artifacting even after ram chip swap and core reflow
Hi Guys
I have an Asus GTX 980 that has red line artifacts on boot.
MATS reports write errors on B0 bank (single chip), so swapped out that chip - still errors / artifacts.
Reflowed the core, same issue.
Anything else to look at other than it having a dead memory controller?
Cheers -
Re: GTX 1060 MATS results?
Maybe try reflowing them first as I had similar issues on 1080ti.
Heating the chips until the solder balls melt and the chip can be nudged and springs back with the surface tension.
Maybe check the FVBVDD resistance from the coils first to check its not low?Leave a comment:
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