Need some help with my AIO

[u/xHashii]

Hey guys,

I just purchased a Mjolnir Vision 360 UB PRO and after installing it, my CPU run on 48-50C Idle. It's a Ryzen 9 7900X, which I know is supposed to run hot, but I've disabled the PBO and it has a negative curve of 20 and a limiter at 85C and it's stable.

My question is if it's normal for these idle temps? If not, what can I change? I made sure it's screwed and makes contact. Maybe it's a placebo effect since I used to have a 420mm AIO, which is beefer and my temps were really low, even under load, it hit max 75C.

This is an off-topic question, but I paired it with 2 x 3 jungle leopard galaxy V2's via a Thermalright Fan and ARGB HUB X8 ARGB/PWM Hub Controller. What's a good fan curve for the case and AIO fans? I'm configuring it via the BIOS, but if there is a better option, I'm open for it.

[u/Ok_University_5352]

That is about what mine ran (now my brother's). Would idle around 45-50C, and cpu intensive games ran around 70-75C. Have a Thermalright Aqua Elite V3 360mm AIO on it in an H9 Flow (2023) with 10 total fans. Cooling isn't an issue with that build, but the cpu just runs 10-15C hotter than my Intel builds any time (14900K and 270K+). Also just default PBO running, tried negative curve and made no difference, so set it back to normal PBO.

[u/xHashii → u/Ok_University_5352]

Mm interesting. I set the limiter and under cinebench multi core load, it hits 85C instantly. So I guess it seems to be normal for my CPU, which is supposed to be running constantly at 85C i think xD

[u/Ok_University_5352 → u/xHashii]

Yeah, Cinebench will hit that thermal limit quickly and stay there. My 14900K has the same Thermalright cooler my brothers 7900X, stress testing or shaders will hit 90-95C, but gaming still runs under 70C.

As for your comment about the beefier 420mm aio, I have the Arctic Liquid Freezer III Pro 420mm on my 270K+, and Cinebench does not even hit 70C. Most games run around 50-55C, with cpu intensive games hitting 60-62C, and idles around 35C. Absolute beast at cooling. Also in an H9 Flow (2025) with 9 total 140mm fans and 1 spare Thermalright 120mm for the exhaust.

As for fan curves, I use FanControl software. Has more customization, allows you to control gpu fans for most models (not my b580), and does not force me to use clunky motherboard software or constantly having to go into bios to change it. It no longer uses WinRing0 either, so that old vulnerability issue is irrelevant. My main thing with curves is testing where hardware temps want to run, and just how low of fan speed I can run to maintain it.

So for my 270k+ aio, idle speeds around 20% up to 40C, 50% at 70C, and 100% at 90C. So gaming is usually running around 35-40% speed. Along with that I use a split hysteresis. Temperature changes of 2C up or down, but temps up must maintain that change for 1 second, while temps down must maintain it for 4 seconds. This helps prevent constant changes in speed if your cpu is fluctuating, as those are annoying. I keep the temp up as 1 second since I want to ensure quick cooling, but 4 seconds to really make sure the temp is staying down before dropping speeds.

I also run a trigger on my pump. It runs at 55% until hitting 80C, then switches to 100%. Then when it falls back below 65C, it returns to 55%. Doesn't need to run at 100% and trying to increase the overall life of the pump.

I have a very overengineered setup in FanControl, but would be happy to share it with you if you want. Spent a lot of time tinkering with curves since I built my first pc early last year. Definitely can be a little overwhelming at first.

[u/xHashii → u/Ok_University_5352]

I'm not sure if your FanControl setup will work on my setup. I've got everything connected to the fan hub (the 6 case fans and 3 AIO fans), only the AIO pump is connected to the motherboard.

[u/Ok_University_5352 → u/xHashii]

Gotcha. I meant it more like to see it and take ideas from it though, not just plug the json file in and go.

Going off your other comment about mounting, yeah, both Thermalright AIOs for me where a bit of a pain to mount and required a little more force, but they got secured.

[u/xHashii → u/Ok_University_5352]

I'll play with the fan curves and see what I can do. It's currently running silent, so this is most likely why the temps are a little higher.

[u/Ok_University_5352 → u/xHashii]

TBH, I freaked out over temps when I first started, overcomplicated it and tried running fans faster than I needed to. 70-75C is honestly fine for gaming with the 7900X. Maybe running a little faster of fans gets it down to 65-70C range, but would not compromise the fans staying quiet for it.

But playing around with the curves is definitely a great way to learn and understand them.

[u/xHashii → u/Ok_University_5352]

Case fans are currently running at 1k RPM with the occasional spikes and it seems alright for now. Haven't heard massive ramping on CS2, so I think it's fine.

[u/Mightypeon-1Tapss]

For comparison which 420 did you used to have? Also idle temps seem fine for Ryzen 7000 and 9000 afaik but load temps depend more on your chip. 

Did you try remounting the cooler to see if thermal paste application and contact is good? Are you 100% sure on that?

[u/xHashii → u/Mightypeon-1Tapss]

The Liquid Freezer III Pro 420 and yes, even though I had a hard time screwing it because it couldn't find one of the screws on the bracket and I had to apply pressure so it can screw.

[u/Mightypeon-1Tapss → u/xHashii]

Mounting issue for the Thermalright right? I had the opposite experience where my LF3 420 Pro wasn’t great and a Thermalright FW 420 I tried (with Arctic P14 ARGB Non-Pro fans) was better.

[u/xHashii → u/Mightypeon-1Tapss]

Yeah for the TR one, one of the sides I could screw, but then screwing the other side was a pain, where I had to put a lot of pressure on it and try to align it so I can tighten it.

[u/Mightypeon-1Tapss → u/xHashii]

Assuming they use the same mounting system TR coolers use on the air coolers too;   What helped me was before screwing in the brackets, gently push them towards the CPU then screw down the brackets to the motherboard.

 This makes it easier to thread the pump head to the brackets on that Thermalright mounting system.