Re: GTX1060 not working, Vcore down to 0.3V
well, I do not want to argue with you but from the 9511 datasheet, it is mentioned that it is a PWM signal, not serial. And also the fact that COMP voltage changes is because the VID signal from the GPU is tristate until initialized, then it modulate the PWM signal. When tristate, this signal is high, when initialized, pwm kicks in and contribute a voltage in the feedback loop. But because the vid signal is only seen as a low, it just lower the output voltage by a factor predetermined by the resistors network. I spent a lot of time reading...
stephtech
Member
Last Activity: 05-19-2022, 06:15 PM
Joined: 12-29-2021
Location: St-Eustache, quebec
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Re: GTX1060 not working, Vcore down to 0.3V
So I may have found something (with a nicer scope), the VID signal going to the 9511 is problematic.
It is not always present, when it is, it is around 0.9V in amplitude and frequency is varying a lot. Rise time is also not sharp, it is a really crappy signal at the moment.
from the 9511 datasheet, it specs 1.2V minimum to detect a high signal on this pin, I got less than that. The Refadj which mirror the VID pin, goes from round 1v to 0 when initialized, thus proving that it does not detect any high level on VID...Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
I just realized that I missed the COMP to verify also, I just did.
Upon power up, I got 1.59V and when initialized, I got 1.43V
not much information in the datasheet for this signal as to what expect.
Does those voltages seems ok?...Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
oh crap, I checked the wrong Vref pin..I checked by mistake pin 8, this is for the 9511P, I have the 9511Q which is pin 4 for the Vref.
So Vref is rock solid at 2.0V, the Refin is actually following the Vcore (from 0.8V to 0.3V)
I reversed the resistor network (because i do not have the correct schematic) and all is good in comparison to the same network of resistor for the 9511P.
what I did noticed though is the VID pin, upon power up, it is at 0.92V solid and when gpu is initialized, it has pwm signal...Last edited by stephtech; 01-17-2022, 10:03 PM.Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
I think you are on something!
the Vref pin is showing 1.85V and when the Vcore drops, it is around 1.0v and not stable. According to the datasheet for the P version (should be the same for the Q), it is supposed to be a stable 1% 2.0V reference.
will have to dig deeper tonight what is going on, to see if the 9511 is acting up or if it is an external component. If internal Vref is screwed up, I think I will just temporarily fit an SOT23 2.0V regulator to confirm proper operation.
will...Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
* did checked the crystal and waveform are nice and steady at 27Mhz *
While there with the scope, I probed the bios chip on pins 2 and 5 to see activity...not much going there but I was using a very old scope that refreshed way too slow to be trustable.
will validate with my Logic8 to get real infos.Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
very good quality suggestions here;
For the VCC on the up9511Q, there is a 2.2R resistor inline and it is ok, 4.97V steady at power up and after bios try to initialize the card.
As for the crystal, I do have 0.9V on XTALOUT and XTALOUT lines. Will dig a scope tomorrow to confirm proper waveform.Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
It is a UP9511Q, not the usual P which has more phases.
For the up9511Q, there is not datasheet available but I did found an image with the pinout.
You suspect something with the controller?...Last edited by stephtech; 01-16-2022, 05:17 PM.Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
yes, same behavior...Leave a comment:
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Re: GTX1060 not working, Vcore down to 0.3V
yes I did but no GPU found...Leave a comment:
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GTX1060 not working, Vcore down to 0.3V
Hi,
Need some help as I am struggling with this GPU.
It is an Asus Dual GTX 1060 3GB
Current problem when I received the board (I do not know previous history), device manager show error code 43. GPU-Z show UNKNOW in Bus Interface (PCIe speed), no display. GPU-Z show all the infos for the board, only unknown for the bus interface.
Steps I took:
1- Disassembled the gpu and physically inspected everything on the board. No missing components, no shorts, no burnt marks, all looks normal. No open 0 ohms resistors.
2- connected... -
Re: New Members - please post your introductions here
Hello,
been here for quite a while lurking around, lots of good information.
I am repairing electronics stuff for ages, got my lab equipped with smd rework capacities.
Now just getting into GPU repairs!
thanks for the access to this site.Leave a comment:
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