Card is fixed, it was my bench PSU which is MDP-P906 from Miniware. On pic are 3 scenarios: 12V with logic disconnect from us5650Q (U26 and U29), 12V when us5650Q logic is in place and 12V from my PC PSU during initial power on. I don’t know why NCP81610 acts this way and why it’s able to boot when its getting multiple EN (when us5650Q is disconnect) maybe playing around boot ramp time for NCP will help but what’s the point? I guess that I have to look for new bench PSU. Please note that probe for 12V was directly attached/connected to MDP output to rule out all potential voltages drops...

Here is actually signal from 5V PGOOD which enables 3V3_seq [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3220908}[/ATTACH]...

p1 p2 stands for PIN number of U29 AND GATE (inputs) also MP1475 was replaced already...

[ATTACH=JSON]{"data-align":"none","data-size":"full","data-attachmentid":3220901}[/ATTACH] going down to the rabbit hole… I found out that I'm momentarily losing EN signal. this lead me to power monitoring IC and then as far as to 5V step-down converter MP1475 (after disconnecting PS_VMON_PGOOD. long story short, it has realy weird ripple on output for about ~200ms and then it’s just fine. this leds to 3V3_seq flickering like crazy as PGOOD are used to EN 3V3_seq. this condition is pretty short and after that all stuff starts working Im getting...

Do not look on voltage as probably 12V from all sources are ok. Check all power consumptions in GPU-Z this Hwinfo is nice but not reliable 🤷🏼‍♂️ for example if you have INA IC involved for power monitoring and is reporting incorrectly then this could happen. I don’t like the idea of 0.000W at any given time even momentary. If you have oscilloscope then you could also check all phases PWM’s and if PMIC is controlled via PWM VID then you can check it also I mean confirm if you have appropriate vcore on corresponding PWM VID level...

Check GPU-Z screen when running some benchmark in low res. especially TPD and power consumption for each 12V source like also check voltage drop in each of them during benchmarking. It could be a power monitoring ic aka INA3221 or similar one or even those 20ohm sensing resistors.

attached pic. from some random 1070Ti just for reference...

hello everyone, I’m new here and apologize in advance if I did post in wrong section etc. currently I’m working on RTX3070 from colorful-igame advanced which has NCP81610 in cherge of NVVDD (vcore). Long story short, I connected to his SMBus with elmorlabs EVC2SE and dumped all regs. In register 0x23, status fault, I got bit 0 - UVP_fault and bit 3 - CLIM_fault. I already replaced NCP but it’s behaving the same way. When I toggle EN to GND (r22 10k on q5 pin3 side) I am able to start NVVDD and all other rails like FBVDD and PEX aslo starts no problem, GPU is pulling 1.5A from lab psu, all...