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GPU temperatures with liquid cooling

Hello all,

 

I have a custom watercooled system (specs in signature). The one radiator I have, is responsible for cooling both the CPU and GPU, and the radiator fans are connected to one of the CPU fan headers in the motherboard, and the speeds are controlled with the CPU temperature. Pretty standard stuff, the higher the CPU temperature, the higher the fan speed. Now, the problem is that in games where my CPU is not being fully utilized, my GPU gets much hotter than when the fans and pump are spinning at 100% speed, because as the CPU is not being fully utilized, it doesn't get as hot, and therefore, the fan speeds are not so aggressive. In games where this happens, such as Modern Warfare, my GPU temperatures are often 10 dregrees higher than normal (Celsius), at 60 degrees. By no means this is hot, but it would be nice to be able to bring the temperatures down a bit by controlling the fan speeds with GPU temperature also. Is this, at all, possible?

 

Thanks, Bruno.

Quote me so I can reply back :) 

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38 minutes ago, bruny06 said:

 

Fan speed should always be coupled to fluid temperature not a component temperature for this very reason. Incoorporating a 2-pin temperature sensor and tying the fan speed to T_SENSOR in BIOS will allow you to do this.

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You could get an adapter for the fan header on the GPU?  I know some folks that use the NZXT Kraken G12 AIO mount will do this, however, I'm not certain how many fans you want to run based off the GPU temp and how many the GPU header can handle.  I'd assume that GPU header is pretty robust though as many will run three fans at pretty high speeds.  

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31 minutes ago, nick name said:

You could get an adapter for the fan header on the GPU?  I know some folks that use the NZXT Kraken G12 AIO mount will do this, however, I'm not certain how many fans you want to run based off the GPU temp and how many the GPU header can handle.  I'd assume that GPU header is pretty robust though as many will run three fans at pretty high speeds.  

Thanks for your reply. Seems like a good idea, however, @For Science!'s idea seems more appropriate for what I need, as the fan speed would spin faster if one of the components (or both), gets hot, without relying on the CPU getting hot.

Quote me so I can reply back :) 

MY PC-> PSU: EVGA SuperNOVA T2 1000W 80 Plus Titanium MOTHERBOARD: ASUS X370 Crosshair VI Hero CPU: RYZEN 7 3700X RAM: G.Skill 32GB (4X8GB) DDR4 3200MHz C14 GPU: EVGA GTX 1080Ti FTW3 HYBRID STORAGE: Samsung 970 EVO 500GB NVMe SSD; 2TB WD Caviar Blue; Crucial MX500 500GB SSD CUSTOM LOOP: EK-Velocity Nickel + Plexi CPU block, EK-FC1080 GTX Ti Acetal + Nickel GPU Block w/ EK-FC1080 GTX Ti Backplate, EK-XRES 140 Revo D5 PWM, EK-CoolStream PE 240 w/ 2x Noctua NF-F12 Chromax fans, EK-ACF Fitting 10/13mm Nickel, Mayhems UV White tubing 13/10mm, 3x Noctua NF-S12A Chromax case fans

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7 minutes ago, bruny06 said:

Thanks for your reply. Seems like a good idea, however, @For Science!'s idea seems more appropriate for what I need, as the fan speed would spin faster if one of the components (or both), gets hot, without relying on the CPU getting hot.

I agree.  

AMD Ryzen 5800XFractal Design S36 360 AIO w/6 Corsair SP120L fans  |  Asus Crosshair VII WiFi X470  |  G.SKILL TridentZ 4400CL19 2x8GB @ 3800MHz 14-14-14-14-30  |  EVGA 3080 FTW3 Hybrid  |  Samsung 970 EVO M.2 NVMe 500GB - Boot Drive  |  Samsung 850 EVO SSD 1TB - Game Drive  |  Seagate 1TB HDD - Media Drive  |  EVGA 650 G3 PSU | Thermaltake Core P3 Case 

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Running a single 240 is the problem. Need more cooling at it wouldn't be an issue. Could keep the fans and pump as a very low speed and still have better cooling.

Main RIg Corsair Air 540, I7 9900k, ASUS ROG Maximus XI Hero, G.Skill Ripjaws 3600 32GB, 3090FE, EVGA 1000G5, Acer Nitro XZ3 2560 x 1440@240hz 

 

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On 11/6/2019 at 10:02 PM, For Science! said:

a 2-pin temperature sensor

Could you please share us how this thing looks like? Point us out to a good one as a recommendation. I think I will use this also for my build.

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Yea if your board supports it, I use the plug style. Bad thing about getting a cheap board, last time I’ll do that.  Gotta get an in-line for the recent build. 

Main RIg Corsair Air 540, I7 9900k, ASUS ROG Maximus XI Hero, G.Skill Ripjaws 3600 32GB, 3090FE, EVGA 1000G5, Acer Nitro XZ3 2560 x 1440@240hz 

 

Spare RIg Lian Li O11 AIR MINI, I7 4790K, Asus Maximus VI Extreme, G.Skill Ares 2400 32Gb, EVGA 1080ti, 1080sc 1070sc & 1060 SSC, EVGA 850GA, Acer KG251Q 1920x1080@240hz

 

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