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bargo
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Заголовок сообщения: RX6900xt missing 0.75_EN signal Добавлено: 26 ноя 2022, 22:36 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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Hello folks,
I hope you are doing well.
i have got my hands on this RX6900XT nitro+ from Sapphire, the card was mostly, baked in an oven from the previous owner, fortunately, the card is still alive. but I'm trying to connect the dots..
As you see on the attached picture I have removed two memory chips, which caused the memory rail not to startup at all, and also the 0.75 rail is not present, I have traced it down to the 1.8V which basically signal a powergood to the 0.75_EN rail. The strange thing with this, is that the powergood signal goes to the MPQ8633A for the 0.75_EN pin, it also goes to other places, but will keep the rest for later, the powergood from the 1.8v rail once its connected to the MPQ8633A 0.75_EN (through a resistor 0ohm) pin it acts differently, it acts as if its an PWM signal, while it should not be like that, I mean it should be a steady 3.5v (at least thats how I understood it) but what I see as a result is the second attached image, which shows the signal being on average at 0.6v with Vpp off 3.5v
Now the 1.8v is up and running, the 0.75 is up and running (at 0.44v) but there is no powergood signal coming out of it (its 0.17v with vpp of 2v) if no powergood from 0.75 then there is no GFX or SOC rails
my question, what should be the circled capacitors voltage (I think that is the MVDDC capacitors), I guess it should be at 0.9v which I see it when I run it at the moment, once I make a steady 3v to the 0.75_EN pin then all rails are up and running at their correct voltages, except the circle capacitors rail, which changes from 0.9v to 1.8v which is too high for the memory, but I maybe wrong, and the correct voltage there should be 1.8v, thats why I'm asking for reference voltage of these capacitors .
All my best,
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 12 дек 2022, 17:19 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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OK. replaced 5 memory chips, but the 0.9v rail for vddc_mem did not come up, so i assume the 0.9v on that rail was actually coming from the 1.8v vpp short I described above, so in theory this rail never came up..
RIght now all GFX/SOC rails are up and running, and the GPU is hot but there is no vddc_mem, the vr controller on the back which is IR35271 seems to be dead, i found a short on the 1.8V decoupling pin, so i replaced it.. Now with a working IR35217 I can see the vddc_mem is coming up for a short while, but then the IR35217 seems to shut it down for another reason..
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 13 дек 2022, 20:08 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargo писал(а): which is a new chapter :) OK now i have plugged my esp32 in, and I can see all the I2C addresses :D the problem is I think finding which one is my device, then figuring out what to communicate.. I think the IR35217 address is the 0x72, of course if anyone has an idea or two, feel free to share.
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bargo
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 23 янв 2023, 15:15 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargo писал(а): I think the IR35217 address is the 0x72, of course if anyone has an idea or two, feel free to share.
I managed to get to the point where all rails are up and running the device manager can at last see the card, bur it does not yet put a picture, i programmed the IR35217 with the IR PowIRCenter, i just reprogrammed the USER section to do 1+1 loop and set the vmax for loop 1 and 2 according to the screenshots here https://elmorlabs.com/forum/topic/6900x ... it-tricks/the memory rail picked up and all voltages are within the correct ranges, 1.3 for memory and 0.87 for Soc/Aux. So more work apparently still needed, this could be a memory issue, as I had to replace 6 chips on the card, which make it a bit hard to investigate without proper software, if you guys know where to find the tCore engine for NAVI21 I could not find anything other than NAVI10 for tserver I'm referring.
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bargo
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 23 янв 2023, 20:52 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargo писал(а): So more work apparently still needed, this could be a memory issue, as I had to replace 6 chips on the card, which make it a bit hard to investigate without proper software, if you guys know where to find the tCore engine for NAVI21 I could not find anything other than NAVI10 for tserver I'm referring.
ok i found a nice tool on this forum, named memtune, it was able to actually see the 6900xt and test its memory, the card was not visible for any agt or tserver command as I can't find the 6900xt 21tCore engine, but it seems this memtune is doing something, I already had a suspicion on G and F and also H, but H is not reported so I will start with G and F and see if memtune reports something else, I used the retrainingcheck with memtune, which reported the attached image.
У вас нет доступа для просмотра вложений: 1. Пожалуйста авторизуйтесь или зарегистрируйтесь. 2. Вы должны иметь 15 (ПЯТНАДЦАТЬ) или более сообщений. 3. У нас можно купить доступ к файлам.
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bargo
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 26 янв 2023, 18:25 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargo писал(а): I used the retrainingcheck with memtune, which reported the attached image.
apparently this memtune is lying, I replaced F and G chips, and made sure they are working chips as I got it from a working/dead board.. so it must at least report something different this time, but it reported the same channels as before so something is not working right.. I still cant find the tserver tests for navi21, trying something like dmgg.py crashes the kernel as apparently some security measures are being taken, from linux kernel side of things (IOMMU) most probably related.. So it would be using a software that wraps around all the pitfalls. Any ideas? All my best, I can still at least see it in PCIE and apparently memory is ok from what GPU-Z is showing, but GPU-Z could be wrong anyway :D
У вас нет доступа для просмотра вложений: 1. Пожалуйста авторизуйтесь или зарегистрируйтесь. 2. Вы должны иметь 15 (ПЯТНАДЦАТЬ) или более сообщений. 3. У нас можно купить доступ к файлам.
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 27 янв 2023, 22:56 |
Интересующийся |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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Good news, bargo писал(а): apparently this memtune is lying The memtune is not lying, but I did not know which is E from F from H, I was doing the old style anti-clock wise from the gpu, this is outdated.. Now I have a different problem with only three CHIPS D-E-G F0/1 is working, which was reported at first as a failure, I can tell you this is 100% working software to test the memories.. bargo писал(а): Any ideas?
use memtune, if its a memory problem it will mostly tell you the truth
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 29 янв 2023, 18:57 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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I just ordered the stencil for the NAVI21 chip, after getting to the point where only G channel is not being trained. I replaced it, and then I got a dead 0 ohm on memory rail, I had to remove three memory chips and the main chip to find the short, and it was a small dust under the memory, when i removed the main chip, i have broken the BK47 address, which is a PCIE related pin, doing something apparently important, but the broken pad, had still a small thread coming from pcie, so i have connected the pad and i can probe the pcie lane again from the BK47..
As I have three memories to reball and the GPU itself, i will take a break from posting, at least it will be three weeks until the stencil arrives, but then I think it should work :D but maybe not.. I thank the Lord of heaven and earth for whatever comes the way...
All my best,
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 13 май 2023, 00:58 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargo писал(а): Should I plant a new GPU here or there is something else I can do to test it (software or hardware).. I can boot with it into Linux and run all the test suits.
I'm proceeding with this, I can't think of anything else at this point, everything seems to be fine, but I guess there is a problem with the chip
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 15 май 2023, 23:15 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargo писал(а): bargo wrote: Should I plant a new GPU here or there is something else I can do to test it (software or hardware).. I can boot with it into Linux and run all the test suits.
I'm proceeding with this, I can't think of anything else at this point, everything seems to be fine, but I guess there is a problem with the chip
OK I replaced it with a working known GPU chip, and I got the same exact three mirrored screens again, any idea, have anyone experienced something similar?
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 04 дек 2023, 20:38 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargoarcomputer писал(а): same card issue for me i will try and replay it
Thank you for sharing your story, would love to get this card sorted out :) I think it could be a pcie issue of some kind, although it seems like a memory issue, but i dont think its a memory issue i have a feeling some channel is corrupted on the pcie lines. All my best,
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 26 дек 2023, 20:41 |
Интересующийся |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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westcoast писал(а): you did check outputs, e.g. DVI, HDMI and they all show the same ?
Thanks for reading. Yes, I did. But they all show the same exact symptom. If i just can get the tcoreengine to work well i could then run all the suite tests. But the problem tcoreengine is failing due to smc firmware load failure. I have a feeling that the Sapphire Nitro+ 6900xt Special Edition (SE) have a special smbus address for the memory VR, if anyone have a similar card and can share the details of the I2C smbus loop1/2 addresses it would be great. My current I2C address for the Memory VR controller. Is 32 and the loop1 address is at 71 and loop2 at 72 all hex of course.
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bargo
[ТС]
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Заголовок сообщения: Re: RX6900xt missing 0.75_EN signal Добавлено: 28 дек 2023, 20:34 |
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Зарегистрирован: 30 дек 2021, 23:28 Наличности на руках: 95.33
Сообщения: 71 Откуда: Germany
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bargo писал(а): My current I2C address for the Memory VR controller. Is 32 and the loop1 address is at 71 and loop2 at 72 all hex of course.
the loop1/2 address is 0x72 and 0x73 not as i mentioned above
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