Melting continues. Likely good to do routine checks
on r/pimax
Source r/pimaxI have now a PTC on my CableMod Connector, shown in aquasuite. For sure, I cannot measure the pin temperature directly, but the metal housing of the CableMod 90° adapter helps to get a rough information whats happening there, maybe I need to add 10° C. I tested with nearly 460W (Powerlimit with MSI afterburner set to 105%) and the temperature just increased. I stopped the test manually at ~60° C, I guess the inner pins were at 70°C+.
This is no good, no real overclocking possible with those fucking 12PHV connectors.
Thank You for reminding me to be careful. 
Quite welcome. 4090 is quite powerful and by your own test/estimates stick stock.
More news on 16pin power connector
There are various discussions. As I faced the thermal issue as well, I can say, if you use up to around 350W no problem, but if you need more (VR-Mirage is a good example), the contact resistance value is just to high, so the contacts are getting really hot… until they may finally melt.
I wonder if maybe conductivity grease if I have the name right. Might help to keep the connectors cooler?
that stuff is for accumulators of old style with liquid acid, more to secure the contact from acid and oxiding or corroding, it does not add support for heating related resistance issues.
…
Either replace the bad connectors or solder it (then you have a fixed power cable)