Tomas

Yeah I think my idle liquid temps are due to the fans being controlled by the motherboard based on CPU temperature (and dropping to only 20% speed as soon as the mobo's CPU temp sensor goes under 55°C) as opposed to being controlled by iCue based on liquid temperature. So I tried the CPU-Z stress test and CPU temps went to 77-79 °C (hottest core/package), stayed there, and liquid temperature went from 34 (idle) to 36.8°C within about 3 minutes, there it stayed. After I stopped the test, the fans went from about 80% RPM back to 20% immediately and liquid temperatures started dropping slowly until they dropped to about 34°C after about 3 minutes. This was all with pump on Quiet. Also, my CPU does not throttle in Prime95 v26.6 (no AVX). It does get to 90°C, yes, but there is no throttling happening at all. It does throttle in P95 versions with AVX, but that is a different story... My case is not air restricted, or at least I don't think so, it's a Crystal Series 570X with 3 LL120 white fans in the front, 1 in the back and one HD140 in the top position. All fans are controlled by the mobo in the same fashion as the CPU cooler fans - at 20% PWM while CPU is under 55°C (the HD140 is the only one controlled by voltage as when controlled by PWM, it spins too fast even on 20% (too loud for my tastes)). That means that in idle / low workload, all the fans in my case (including the ML140's I have on the H115i's radiator) spin at around 380 RPM (the 1 HD140 fan at 480 RPM). And yes, when I set the pump to Extreme, liquid temperature moves up by only 1-2°C under load compared to idle. I compared those temperatures to my gf's PC, where she has that delidded 8700K (4.7GHz, 1.22V, Conductonaut between silicon and IHS, Kryonaut between CPU and the Kraken X62): I punished her system with Prime 95 v29.4b8 (a TON of AVX), small FFT's. Hottest core and package were at 72-73°C, and the Kraken's liquid temperature raised slowly to 35.6°C. So I think there is no problem with my system, just that in idle, my fans spin at 380 RPM, regardless of what the liquid temperature is. And I still believe giving users the option to control pump speed based on CPU temp or liquid temp (per user's choice, just like NZXT does), would be beneficial to many users.

Adding results of my testing I just did with Prime 95 26.6 (small FFTs) (using CPU package temp for CPU temp as this sensor usually shows the highest value of all sensors on my CPU): Starting with pump at Quiet and liquid temp at 35°C. Prime 95 test started, CPU temp raising immediately to 93°C and dropping to 90°C within a few seconds after fans raise to 100% RPM quickly. CPU temperature after that remains at 90°C, while H115i liquid temperature raises gradually to 39.1°C, then stops at this value. CPU temperature stable at 90°C. Then (about 10 minutes after start of the test) I change H115i pump to Extreme. CPU temperature immediately goes down to 82-83°C and H115i liquid temperature starts dropping slowly towards 36.3°C, where it stabilizes after about 5 mins. CPU temperature remains jumping between 82-83°C the whole time while liquid temperature drops from 39 to 36°C.

Idle liquid temp is about 34.3°C, while room temperature is 22.3°C. That is after the PC has been on for about 30 minutes and after watching a 15min youtube video. Pump on 2K RPM. When I check my gf's PC, where she has a 8700K (@4.7 GHz, delidded) and a Kraken X62 with pump at 2K RPM, also idle for about 30 minutes, the X62's liquid temp is 29°C. When I change the H115i's pump to Extreme (3K RPM), the liquid temperature does not change. One note of interest might be that before I put liquid metal (Conductonaut) between the CPU and the H115i, I used normal paste (Kryonaut) and the difference between pump @ Quiet and Extreme was 2°C under heavy load (Prime95). This difference increased rapidly when I put Conductonaut between the CPU and the H115i. Temperatures under load dropped about 10°C when on Quiet, and about 4°C when pump on Extreme. Also, please note that I do not have the fans connected to the H115i's headers but to my mobo's headers and I don't use the stock fans but ML140's.

Hi. I would like to know if Corsair plans to bring dynamic pump speed control to iCue, like for example NZXT already has in their CAM. My problem is that I really like to have my PC as silent as possible in light workload (idle, web browsing, watching videos) and I don't care about it being loud under load (video encoding, gaming, etc). I have all my fans set up to stay at 20% while CPU is under 55°C in UEFI, blasting to higher RPM if CPU temp goes over that limit, hitting 100% of max RPM when CPU hits 65°C. Now, when the CPU is under 55°C and the fans are at 20%, I can hear my H115i's pump. I don't mind it when it's set to "Quiet" (2000 RPM) but I really hate it when it's set to "Performance" (3000 RPM). I would like it if iCue could monitor my CPU temp and only switch the pump to 3000 RPM if CPU goes over 55°C and then switch back to 2000 RPM if CPU is under 55°C. NZXT can do this, one can even set the pump RPM to an arbitrary value between 2K and 3K RMP and create graphs etc. The temperature difference between the pump at 2K RPM and 3K RPM is quite noticeable in my case (about 7-10°C), as I have an i9-9900K @ 5.0 GHz with liquid metal between the CPU and the H115i, so I would like to enjoy the benefit of 3000 RMP pump under load and quietness of 2000 RPM when idle.