Hello, first of all, I do all my conversations with google translate. So if there is anything wrong with the meanings, please warn, I've been dealing with the this problem for about 5 days. I haven't found a solution yet. I will post videos and photos.The picture I drew is a bit ridiculous, but in short, (When I started it in this way, spark came out from the rx470. Because my cable replicator was from CPU to GPU, reverse voltage came.) this rx470 broke my other cards while trying, but except for the 2080s, I don't understand why the others are broken.all cards are connected via pci ex 1 risers.when i try the video card on my own computer The 3090 fans are spinning little lcd screen on but there is no post. 5700xt only the power socket lights are on, there is no post no rgb lights.I've been trying to find a solution for 4 days and now I'm very tired and sleepless. I am open to all your opinions and help.
what have i tried:
-I tried both bios with the bios switch on the 3090. and also
-I wrote bios on 5700xt
-I tried the second pci slot it doesn't see from device manager
-I tried with 3 different motherboards and 3 different psu.
what i found::
--U811 coded L2 (in the pictures and gate) there is 1.8 volts on the 1st leg of the part) but the input one and two are grounded and there is no output naturally
--and also only the 3rd one of the leds on the power cables is lit at the required brightness, the others are dimmer(GPU chip heats up normally)
---1 resistor value in 12 volt inputs gives normal. But the other two start from zero and slowly rise and rise, I added the video.
If you tell me the places I need to measure, I will also add
feel free to say all your ideas. I'm open to all suggestions
The 2 inputs on the 12 volt inputs have a crap in the measurements
https://www.youtube.com/watch?v=dTup6SJMmTY
voltages:
https://www.youtube.com/watch?v=C_tnuVLd414
!!!First of all, I don't know why, but I can't get values with the red probe. When I measure inversely, there are values?!!!when red is grounded .i can measure with black
thanks for the answer, now i measured and took the video, the front side looks right to me. but pex gives a short circuit at the back, i couldn't find the reason exactly.I think the short circuit in pex is due to the problem at the input of the u811 coded and gate. But why is there a short circuit at the input of the and gate, I could not find it? Normally 1 and 2 are 3.3v. The third leg needs to be ground. In my case, 1.2.3 are all grounded. But when I energize the card, there is a value of 0.30 V.
https://youtu.be/DrDrC4vnvl4
https://youtube.com/shorts/A5LZsRWdhEg
what have i tried:
-I tried both bios with the bios switch on the 3090. and also
-I wrote bios on 5700xt
-I tried the second pci slot it doesn't see from device manager
-I tried with 3 different motherboards and 3 different psu.
what i found::
--U811 coded L2 (in the pictures and gate) there is 1.8 volts on the 1st leg of the part) but the input one and two are grounded and there is no output naturally
--and also only the 3rd one of the leds on the power cables is lit at the required brightness, the others are dimmer(GPU chip heats up normally)
---1 resistor value in 12 volt inputs gives normal. But the other two start from zero and slowly rise and rise, I added the video.
If you tell me the places I need to measure, I will also add
feel free to say all your ideas. I'm open to all suggestions
The 2 inputs on the 12 volt inputs have a crap in the measurements
https://www.youtube.com/watch?v=dTup6SJMmTY
voltages:
https://www.youtube.com/watch?v=C_tnuVLd414
!!!First of all, I don't know why, but I can't get values with the red probe. When I measure inversely, there are values?!!!when red is grounded .i can measure with black
thanks for the answer, now i measured and took the video, the front side looks right to me. but pex gives a short circuit at the back, i couldn't find the reason exactly.I think the short circuit in pex is due to the problem at the input of the u811 coded and gate. But why is there a short circuit at the input of the and gate, I could not find it? Normally 1 and 2 are 3.3v. The third leg needs to be ground. In my case, 1.2.3 are all grounded. But when I energize the card, there is a value of 0.30 V.
https://youtu.be/DrDrC4vnvl4
https://youtube.com/shorts/A5LZsRWdhEg