Valorant’s ranking system has already been through plenty of changes. Nowadays, we have Rank Rating, or RR, tangible points that let you know how close you are to ranking up or down. Before, there were just little post-game indications of moving up or down in the form of green or red...
A bad or faulty driver is also a possibility that can cause your graphics card fan to stop spinning or make it behave in a strange way. So, if you are facing this problem just after installing a newer driver or another version of the driver then you must roll back to the older driver...