What are your vRAM idle temps ? This are mine while browsing and watching YT at the same time. Ambient is about 24ºC.
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Add 6º-8ºC more to the maxs if I had the zero-RPM mode on, right now these are the temps with light tasks, some browsing and youtube with fan on, at its bare minimum 15-17%. This is on a 22ºC ambient room temp with windows closed, so no extra cooling. Note that my card is running Hynix chips on the VRAM.
Now back to gaming, as stated in my previous post, with my room windows opened and a constant breeze on night-temps so around 18-19ºC ambient. 10min idling + 1h30min gaming + 15 min idling, a drop of around 4ºC on maxs as stated.
It's worth mentioning that I’ve got 2x120mm fans blowing directly into the card, even if they’re just running at 700–900 RPM. Adding a picture for reference (don't judge the covering panel, it was just a fit-test with a very improvised design, still needs improvement). This is just to highlight that for air-cooled cards like ours, ambient temps play a big role, and of course, proper case airflow is key.
If you're seeing high idle temps and it concerns you, the first thing I'd check is your case airflow. And just in case, try disabling the zero-RPM mode and setting a less aggressive fan curve than the one Adrenalin uses by default. Sure, it might shorten the fans’ lifespan a bit, but with an average of 50,000 hours, if not more, I'd say we're safe even with the fans running constantly.
However, unless you have a disease-obssession with temperatures as I do, even if it's just for scientific purposes, I'd say it again, don't worry at all, your cards are safe and running within spec temps, so let's enjoy them!
edit: I must add that, after switching to 120Hz monitor, I saw memory clocks scaling more than often to 2505MHz on certain browser-accelerated tasks, not just related with video, this didn't happen on 60Hz where max clocks on these tasks were 909MHz and scaling down properly, which led to lower temps, at least in Windows, not as the situation as
@AusWolf mentions on his linux installation.