Cities: Skylines II

Cities: Skylines II

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Briseti Dec 12, 2023 @ 6:46pm
GPU usage.
I have a 4090 in a solid build and i'm getting 95%+ GPU usage, causing my GPU heat to spike to above 90c. Is this what people are typically experiencing with this game in its current state? I've disabled all the options that have been suggested that others have suggested to bring the GPU usage down and I have had success turning off all the options so it looks terrible but i'm able to run the game between 70 to 80c. I don't feel comfortable when i see the temps get close to 100c so Is this being looked at by the devs?

My GPU is custom watercooled with an active backplate so cooling isn't an issue with virtually any other game I've ever played, including CPR and other high demand games.

Thanks for any input anyone may have.
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Showing 1-15 of 17 comments
Rdizz Dec 12, 2023 @ 6:58pm 
Sounds like you need more cooling. that card at 95% should not be hitting 90c. In fact its thermal limit is 84c before it starts to throttle.

I find these numbers suspect that or you need some serious case cooling and an aggressive fan profile on that card.

a card running at 100% isnt an issue and still shouldnt overheat like that so long as everything is being cooled properly.

maybe its case air flow.

I mean especially since that thing is liquid cooled, makes no sense to me.

my 3080ti doesnt even cross 75c at full settings in this game.
Last edited by Rdizz; Dec 12, 2023 @ 7:01pm
Briseti Dec 12, 2023 @ 7:20pm 
I have two radiators, one with two 140's and the other with three 120's in a HYTE Y60 case in a single custom loop. The waterblock incasing the GPU has an active backplate so it is cooling both the front and the back of the card. Are you saying it's worth taking completely apart to inspect the condition of the thermal paste, which I applied myself and have experience installing waterblocks on multiple builds? The coolant temp doesn't go above 50c for the entire loop. Or is it something else? I've been seeing other threads popping up with overheating issues with high GPU usage. I can run Cities Skylines 1 with no issue at all.
Stormfire962 Dec 12, 2023 @ 8:21pm 
Originally posted by Briseti:
I have two radiators, one with two 140's and the other with three 120's in a HYTE Y60 case in a single custom loop. The waterblock incasing the GPU has an active backplate so it is cooling both the front and the back of the card. Are you saying it's worth taking completely apart to inspect the condition of the thermal paste, which I applied myself and have experience installing waterblocks on multiple builds? The coolant temp doesn't go above 50c for the entire loop. Or is it something else? I've been seeing other threads popping up with overheating issues with high GPU usage. I can run Cities Skylines 1 with no issue at all.

Your situation might be simpler to fix then you might think. I took a look at the case which I have to say is cool looking to say the least. But also raises a slight concern with it. For instance, the case could create a heat pocket very easily if the radiators aren't position carefully in the right locations. Hopefully you mounted your radiator with the 120's vertically and not on top. If you didn't you might have heat pocketing in the center of the case causing.

Also, here is a good video from Gamer Nexus that you might like: https://www.youtube.com/watch?v=Ysb25vsNBQI
I once saw a case with AIO and four other fans. But they were all exhausting. No fresh air intake fans. One fan turned around to intake air solved his temp troubles, and two intakes made it awesome.
Common error.
Seen AIO coolant go bad too. Seen plates covered in algae/scum too.
Last edited by zaltocleotl[Banned@Paradox]; Dec 12, 2023 @ 9:31pm
archonsod Dec 13, 2023 @ 4:02am 
Originally posted by Briseti:
The coolant temp doesn't go above 50c for the entire loop. Or is it something else? I've been seeing other threads popping up with overheating issues with high GPU usage. I can run Cities Skylines 1 with no issue at all.
The coolant is at 50C which suggests the radiators are doing their job*, but the card is reporting 90C. That's a 40C delta. So either the heat transfer between the water and the backplate is insufficient (for some reason), or the card temperature is wrong (bearing in mind the card should have started throttling at 82; so if it's legit hitting 90C and the cooling system is working it would suggest it's insufficient to cool the card even when underclocked).
* One thing to look at is where the temp sensors are. One of the primary questions I'd have here is where is the coolant temp being read from and where is the card? If you've got a broken pump or trapped air in the system it's quite possible you're seeing the card hitting 90 while the coolant remains 50 because the coolant isn't being pushed around the system effectively.
Stealthy Dec 13, 2023 @ 4:27am 
Game does punish GPUs unnecessarily hard and that should be improved in this weeks patch.

However, according to some youtube channels like Jayztwocents, coolant should remain closer or below 40 degrees C, so your 50 sounds a bit high. As mentioned above, are you sure it is circulating as it should because you seem to have enough radiators to cool it down? (are you running fans on full power, and is there any airflow restrictions like dust filters etc in front of the fans or behind the radiators?)
Krauser Dec 13, 2023 @ 6:37am 
You dont need to do weird things with liquid, lot of fans with big radiators, etc, to get good temperatures.

I have the Gigabyte 4090 gaming OC in a Fractal Torrent with Noctua NH-D15 and the GPU is not going more than 60c at 400W as well the CPU (5900X) not reaching 70c with the cooler fans at 30%, all of that with stock CPU/GPU, no undervolting.

Since Gamer Nexus reviewed the Fractal Torrent with the Noctua I gave up with all expensive gaming crappy things and ended buying that combo. The best decission ever made. No more temperature and noise problems, I got deadly silent, cold and reliable PC.
purrcat33a Dec 13, 2023 @ 10:25am 
Originally posted by Krauser:
You dont need to do weird things with liquid, lot of fans with big radiators, etc, to get good temperatures.

I have the Gigabyte 4090 gaming OC in a Fractal Torrent with Noctua NH-D15 and the GPU is not going more than 60c at 400W as well the CPU (5900X) not reaching 70c with the cooler fans at 30%, all of that with stock CPU/GPU, no undervolting.

Since Gamer Nexus reviewed the Fractal Torrent with the Noctua I gave up with all expensive gaming crappy things and ended buying that combo. The best decission ever made. No more temperature and noise problems, I got deadly silent, cold and reliable PC.

I've recently specified and then bought a PC with the same case, although I am using the stock fans and a 360 AIO on a I7-14700K. The case looks really nice, is relatively quiet and my component temperatures are about the same as yours. I'm on a humble 4070 Ti, so a poor relation to you, but I'm also burning a little less power - just 487 watts for the whole system on a 150K city running 2k windowed.

I agree, water cooling didn't seem necessary for me either.
L0n3_W0lf Dec 13, 2023 @ 10:30am 
Not me, my 6600 XT reaches a max of 72C so far for cities under 50,000 population. I’ll update if I begin seeing fluctuations.
Briseti Dec 13, 2023 @ 1:20pm 
Okay, a lot of good feedback in this thread. Currently when I start up CS2 the GPU usage spikes up instantly to over 90+ usage, the Temps of the GPU it self spike very quickly even though the coolant is at ambient temperature. So regardless if my fan configuration isn't sufficient, the coolant is already in a low cool state so it should be cooling in the peak potential. I takes a while for the coolant to gradually warm up but the fans do a really good job keeping the coolant below 55 degrees. On max settings my GPU is reporting over 90c within moments of booting up the game. The coolant temperature sensor is the corsair threaded insert on one of the resivoir ports as directed by the instructions.

Additional details. I am running a super-ultrawide monitor (5120×1440) so that is already putting some stress on the GPU. Both the radiator fan configuration are pulling cool air from the outside from the side and from the top and venting the hot air out the back and wherever there are vents for air to be pushed out. Cool air is being pulled in from the bottom as well. This fan configuration is concerning to me because I feel even though it is pulling cool air from all angles that it is creating pressure in the case which may be inhibiting the fans to pull air though the radiator as efficiently as they could. Either way, the coolant is always reporting low numbers so I am not that worried about it, however it does get VERY hot in the case (when running CS2).
Rdizz Dec 13, 2023 @ 1:24pm 
Originally posted by Briseti:
Okay, a lot of good feedback in this thread. Currently when I start up CS2 the GPU usage spikes up instantly to over 90+ usage, the Temps of the GPU it self spike very quickly even though the coolant is at ambient temperature. So regardless if my fan configuration isn't sufficient, the coolant is already in a low cool state so it should be cooling in the peak potential. I takes a while for the coolant to gradually warm up but the fans do a really good job keeping the coolant below 55 degrees. On max settings my GPU is reporting over 90c within moments of booting up the game. The coolant temperature sensor is the corsair threaded insert on one of the resivoir ports as directed by the instructions.

Additional details. I am running a super-ultrawide monitor (5120×1440) so that is already putting some stress on the GPU. Both the radiator fan configuration are pulling cool air from the outside from the side and from the top and venting the hot air out the back and wherever there are vents for air to be pushed out. Cool air is being pulled in from the bottom as well. This fan configuration is concerning to me because I feel even though it is pulling cool air from all angles that it is creating pressure in the case which may be inhibiting the fans to pull air though the radiator as efficiently as they could. Either way, the coolant is always reporting low numbers so I am not that worried about it, however it does get VERY hot in the case (when running CS2).


All i know is this. Your card should not be hitting 90c even at 100% usage. These cards are designed to run at 100% usage. 84c and it should auto throttle to stop damage. If you installed this cooler on your card it may not be installed correct.

I know you have experience but even the best make mistakes, it could even be a bad thermal paste connection I really don't know. I always do liquid cooling but just never have on the graphics card before.
Krzychu1245 Dec 13, 2023 @ 1:41pm 
Have you tried Furmark or other benchmark which can force high GPU usage? Game does not use anything special when it comes to rendering. High utilization (coupled with low framerate) is because GPU has to process a lot of triangles, in certain scenes many times more than in other games. It sounds really bad if GPU temp spikes to such high numbers (that's above max temperature so essentially guaranteed throttling). I'm on 4090 too, stock Aorus Master(probably the biggest non-water cooled card on the market) and I don't remember if I ever saw more than 65C at full load. The cooler is way too big for 450W card so I'm surprised you are getting such numbers.
I see you use custom watercooled solution. Are you 1000% sure that the cooler is mounted correctly (has very good, even contact with the core)? Big spike of temperature usually tells that cooler surface is not contacting evenly with the core (there is not enough surface to dissipate heat) Quite common problem in CPU cooling world, epecially with i9 13900k or 14900k.
MayorButters909 Dec 19, 2023 @ 12:42am 
I've got 9 fans in an open-cased system, under a desk with half of one of its sides is open. my GPU heat is it 31 Celsius. I googled that because I'm Uhmerican. That's kinda hot at over 80 degrees Fahrenheit. I think I need to take it out from under the desk, see how that works.
Mansen Dec 19, 2023 @ 1:45am 
Originally posted by Briseti:
I have two radiators, one with two 140's and the other with three 120's in a HYTE Y60 case in a single custom loop.

I definitely think it's worth inspecting your loop. You shouldn't really be seeing more than 40-50c on a watercooled GPU if the loop can actually handle the kind of thermal heat dumped into the radiators.

Otherwise you'll have to artificially limit how much your CPU and GPU spits out by reducing settings in the game.

Your tubing isn't really made for heat either - Ideally the temperature of the water inside shouldn't go above mid fourties, before it could cause longterm damage (a sensor helps, because otherwise you can't really measure this)
Dave Dec 19, 2023 @ 2:14am 
"It is 90 degrees"

"Cooling isn't an issue"

Yes, yes it is. You can fry a 2000$ card just as easily as a 100$. 90degrees is very, very toasty.
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Date Posted: Dec 12, 2023 @ 6:46pm
Posts: 17