Palit RTX3080 PCI-e not detected

会员1244779 · 发表于 2022-2-28 23:21:27

qinhecat 发表于 2022-2-28 19:35
1V8 - 313 ohm - diode -0.341
1V8 power's res is abnormal，normally it will be 10~30k ohm or above. ...

I will give low voltage from outside and try.

会员1244779 · 发表于 2022-3-2 03:33:00

I removed one leg of the 1.8v coil
The value on the pwm side is high ohm (9-10kohm)
output was low. 340 ohms. I supplied voltage from outside. It would draw 0.02 current. but i didn't see anything warming up

会员1326509 · 发表于 2022-3-2 05:41:58

if rst signal is OK, please be are the diode voltage to ground, (red test lead to groud about 0.3, black to ground should be infinity).

会员1244779 · 发表于 2022-3-2 15:54:06

testpoint 发表于 2022-3-2 05:41
if rst signal is OK, please be are the diode voltage to ground, (red test lead to groud about 0.3, b ...

If I'm not wrong, are you asking to measure the PEX_RST_BUF signal in diode mode?
showed no value.

会员1399464 · 发表于 2022-3-2 19:18:12

vusalcrm 发表于 2022-3-2 03:33
I removed one leg of the 1.8v coil
The value on the pwm side is high ohm (9-10kohm)
output was low ...

I measured my 3080's 1.8v rail and it's 400 ohm in resistance and 341 ohm in diode...

Maybe you don't have a problem here.

会员1230258 · 发表于 2022-3-2 21:32:08

我英语不好，爱莫能助

会员1244779 · 发表于 2022-3-2 22:57:53

Poko 发表于 2022-3-2 19:18
I measured my 3080's 1.8v rail and it's 400 ohm in resistance and 341 ohm in diode...

Maybe you ...

I watched a video on youtube. If the person measuring there had an ohm value of 300, it sounded like there was a short circuit. But I couldn't be completely sure.

then that line is normal.

PEX_RST_BUF
When I measure the reset signal in diode mode, it shows no value.

会员1326509 · 发表于 2022-3-3 03:17:40

vusalcrm 发表于 2022-3-2 15:54
If I'm not wrong, are you asking to measure the PEX_RST_BUF signal in diode mode?
showed no value ...

OK, GPU down, good luck

会员1399464 · 发表于 2022-3-3 10:08:53

vusalcrm 发表于 2022-03-02 22:57
I watched a video on youtube. If the person measuring there had an ohm value of 300, it sounded like there was a short circuit. But I couldn't be completely sure.

then that line is normal.

PEX_RST_BUF
When I measure the reset signal in diode mode, it shows no value.

I also checked my 3090. 1.8 rail measures 230 ohm in reverse diode. I also checked PEX_RST_BUF*, it reads 293ohm in reverse diode.

It sounds like your RST signal got desoldered on the GPU side. I would reball the GPU if I were you. Good luck!

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会员1326509 · 发表于 2022-3-3 12:16:34

Poko 发表于 2022-3-3 10:08
I also checked my 3090. 1.8 rail measures 230 ohm in reverse diode. I also checked PEX_RST_BUF*, i ...

if you dismount the GPU chip, just use the DMM to test the pin to determine the problem.

会员1244779 · 发表于 2022-3-3 15:31:04

I talk to the customer. According to what he said, welding works were being done in the neighborhood. then at this time i connected the video card to the computer and suddenly the video card stopped

会员1244779 · 发表于 2022-3-3 15:38:27

Poko 发表于 2022-3-3 10:08
I also checked my 3090. 1.8 rail measures 230 ohm in reverse diode. I also checked PEX_RST_BUF*, i ...

then the values for the 1.8 line are normal there is no problem here
I remeasured
this time i connected the red probe to the GND
I connected the black probe PEX_RST_BUF
0.657

later
I connected the red probe PEX_RST_BUF
black probe GND
10 kohm value showed

会员1244779 · 发表于 2022-3-12 19:13:10

Poko 发表于 2022-3-3 10:08
I also checked my 3090. 1.8 rail measures 230 ohm in reverse diode. I also checked PEX_RST_BUF*, i ...

293ohm in reverse diode. - I did not fully understand this measure. Can you explain a little bit?
maybe it doesn't belong to this topic, but i can't solve the logic of using diode mode with dmm. Is the value 0.400mv a voltage value applied to the line there?

会员1066506 · 发表于 2022-3-12 19:57:03

小莹虫发表于 2022-2-27 09:24
你翻译给他说鬼佬来迅维学校系统学习吧。别再瞎搞胡搞了！

看他样子不像瞎胡搞，技术应该有相当，他可能没有图纸，要来这边问人而已，在油管很多维修大神主播的，特别是俄国人的都是高手

会员1399464 · 发表于 2022-3-13 03:14:06

vusalcrm 发表于 2022-03-12 19:13
293ohm in reverse diode. - I did not fully understand this measure. Can you explain a little bit?
maybe it doesn't belong to this topic, but i can't solve the logic of using diode mode with dmm. Is the value 0.400mv a voltage value applied to the line there?

This is what I meant.

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会员1244779 · 发表于 2022-3-17 15:36:35

thank you for your comments
Most likely the gpu is bad. I returned the graphics card to the customer.

会员1244779 · 发表于 2022-3-17 15:37:27

Poko 发表于 2022-3-13 03:14
This is what I meant.

https://www.chinafix.com/thread-1306241-1-1.html
I would be very happy if you let me know your opinion.

会员1397606 · 发表于 2022-3-21 13:25:39

I have the same issue in my galax rtx 3070 lhr。all voltage is normal，All resistance values are normal, and the crystal oscillator is 27m.but mainboard can't detect the gpu device。rstbuf have 1.8 voltage。maybe is the 30 series new problem。

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会员1244779 · 发表于 2022-3-22 03:26:34

a6464863 发表于 2022-3-21 13:25
I have the same issue in my galax rtx 3070 lhr。all voltage is normal，All resistance values are nor ...

the problem of that integrated is chronic. because a few friends also faced the same problem

Palit RTX3080 PCI-e not detected

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