Ich würde die Spannung-Frequenz-Kurve garnicht aktivieren. Entweder im Treiber den Bereich komplett ausschalten oder halt nur die Maximal- und Minimalwerte der Frequenzen nutzen, so in etwa:
Link Geht das nicht für diese Karte?
Für WLP bei Grafikkarten hab ich keine Empfehlung und keine Erfahrung. Aber bitte vorher mal recherchieren, damit du weißt, was du tust.
The temperatures 55/75 and 60/85 already show rather big differences of 20°C or more. The absolute values, especially the hotspot, are ok, but the relative difference already shows, that there might be an issue. And then yesterday's 73/111 reveals a difference of 38, which is far too much.
What is the third setting?
When looking again to the three images you posted above: You try to blow rather much power/voltage into your card. 1,167 V is a lot, 261W is beyond 'a lot'. High voltage and power result in high temperatures. So besides the assumed poor heat conduction you also should lower the power input. Read here or at hardwareluxx.de or other internet forums and sources about UV (undervolting) of Radeon cards. In most cases it works fine and you get the same performance than stock performance or even slightly more by investimg significantly less power/voltage. So UV also would help your card.
BTW: you speak Spanish and English, right? The German texts are machine translated? There's no need to translate into German here, most of us speak English and the machine translation sometimes makes the texts difficult to understand.