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H80i V2 2700 RPM


Veng
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Hi, i apologize if this has been discussed but i couldnt find anything.

I currently have a H80I v2 cooler and i use to have a i5-6600 Skylake and then upgraded to the i7-7700k. My radiator is set as an exhaust in the back of my case as instructed.While gaming (Vermintide II for example) my processor will hit 50% load and drop back to around 27-40 at around 43-56°C and out of nowhere my fans on my radiator kick up between 2550-2700 RPM and will continue going that fast until i shut the game off for at least 5-10 mins. The radiator temp reads at 39-42°C. Is it safe/normal for my fans to be hitting max rpm for so long? Im new to watercooling so im just curious/concerned. Forgot to mention my pump rpm is at 1950 (if i remember correctly) as well when it starts doing this and the fans are loud while spinning that fast. Never had this issue when i had the i5-6600 Skylake.

Edited by Veng
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The radiator temp reads at 39-42°C. Is it safe/normal for my fans to be hitting max rpm for so long?

 

This is why the fans are high. Fan speed is based on coolant temperature (H80i v2 Temp). This is how the system works. Cold plate conducts heat away from the CPU. Liquid in the system transports it to the radiator for release. Fan speed helps release heat outside the system.

 

In your case, your cooling system is most likely being affected by excess GPU heat. If the local temperature outside the radiator is 40C, then the radiator coolant will also be at least 40C. On a h80i v2, 45C coolant temp = 100% fan speed, hence the airplane like sounds.

 

We can take a look at your total case heat management (other fans etc), but in the meantime, set up a custom curve and turn them down. You can't make the coolant lower than the local temp, so 2000 rpm won't help more than 800 rpm when this is the case.

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An H80i, particularly if rear mounted above the GPU, requires a bit more management. You will see higher than expected coolant temps because of the heat zone created by extended GPU loads. The standard curves were not meant to accommodate the extra.

 

If this is rear mounted, you also have to give some thought to what part those fans play in your cooling system. If you have a passively vented top and this is the only exhaust, you need to keep some speed up just to have a normal exchange rate. My preference when running this way was to use a fixed speed for things like gaming, where I needed some CPU cooling and a lot of rear exhaust. Set it to something you can tolerate. The CPU is not overly dependent on fan speed and you don't need them to be reactionary to CPU load.

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