2/29/2024 0 Comments Monitor coolanty temp pcIf your motherboard doesn't have this header, you might need to spend a little extra to get a controller that can do this for you, but I reckon it'll still be well worth the effort and expense.Temperature Sensors and Why You Need Them! (4:32) - MP3 - 1.55MB So long story short: If you’re running a custom loop and your motherboard supports a standard two-pin thermal sensor, do yourself a favor and spend the $10 for a sensor, $10 for fresh coolant, and the afternoon it takes to set up a control mechanism based on what really matters, the fluid temperature. Nobody should control a liquid loop like that. So before installing the sensor, the only way to have the fans speed up because of the GPU was to set a curve based on the CPU temperature, and then wait for the CPU to warm up from the GPU warming the loop up. Before the mod they also wouldn’t spin up at all when the GPU was spitting well around 250 watts into the loop – because for some ridiculous reason, it’s still not possible to set motherboard-controlled fan curves based off of the GPU temperature. When I was running it off the CPU temperature, the fans would spin up significantly at the slightest CPU load spikes, which the loop can absorb anyway. With everything at full blast it's uncomfortably loud, but there is no reason to ever run it like this unless your only goal is pushing overclocks.īasing the fan curves on the coolant temperature is a much better method of controlling the fans in a liquid loop than with a fixed fan speed, or based on the CPU temperature. To give a point of reference, I set the fans to full speed and measured how much noise the system is capable of producing with the cooling loop running at maximum capacity, and it's safe to say that the noise level there is an order of magnitude higher. It’s only when you game for extended sessions that the fluid warms up enough to warrant higher fan speeds and consequently noise, and even then, the noise levels are still extremely low.įor laughs, I also measured the noise level of the coil whine the GPU produces under load in a cold loop before the fans spin up, and it measured 35.2 dB - right in between the CPU full load measurement and the noise level of an extended gaming load. It's so quiet that when my friend entered the room and saw the system, he commented on how quiet it runs, and he wouldn't believe me when I told him that Prime 95 was running for the past hour at smallest FFTs (maximum heat generation). Putting all 12 cores of the Ryzen 9 3900X under full load does practically nothing to raise noise levels, even though the fans for the top radiator and intake enter duty. Idle, it isn’t audible over the noise floor of the room, unless you get very intimate with the case. Its a bit of a shame that we didn't achieve fully passive desktop use, but the Noctua NF-A12x25’s are totally inaudible at 750 RPM on a radiator anyway, especially when pointed away from the user.Īs you can see, the system is extremely quiet. Turning the side intake to always run kept the loop a hair under 30 degrees most of the time during normal desktop use. I also set the side intake to always spin, as I found that totally passive, the loop would still warm up to 30 degrees idle, making the system swing back and forth between passive and idle quite often. The first thing I noticed was that the Noctua fans ran much quieter on radiators than as a free intake at the bottom of the case, so I dropped the intake fans’ speed by 10 percent across the board, which seemed to match the radiator’s fans for noise levels. But he, just in case, you know?Īfter all that, a little more finetuning was required. At 30 ☌ they could start spinning, and by a fluid temperature of 50 ☌ I wanted them to run at full speed, though they should never need to reach this point. I then set all the fans to stop spinning when the fluid temperature is below 30 ☌, which meant I couldn’t connect any of the fans to the CPU fan header, as Asus doesn’t allow CPU fans to stop entirely.
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