Hi, (sorry big text comming)
I just noticed the same problem with my h100i pro platinum, I think it's mainly a software problem because I don't think I noticed it before, moreover, the temperature rise seems to be related to the number of leds lit and from which device.I have different results according to the leds lit, when only the LEDs of the block are lit (no fans, keyboard, asus motherboard) only the 16 leds of the block, the coolant temperature increases from ~26.5°C to 27°C. then it restores itself to 26.8°C.
Now I turn off once again all the leds except the 4 of one of the two ML PRO RGB fans connected to the pump, the temperature of the liquid increases to ~31.5°C. Remember that the 'normal temperature' is 26.5°C,
Now let's try to switch on the second ML PRO RGB fan, so only 8 leds, the temperature remains at ~31.5°C,
let's try to turn off the first ML PRO RGB fan while keeping the second one on, so only the second one is on and the temperature goes down to ~29°C , but it would be a shame if it's so simple, by turning on the first one and turning off the second one the temperature stays at 29°C then while I'm writing this post (let's say it's been 5 minutes) the temperature goes back up to 30°C knowing that my CPU is still in IDLE at 30°C and that all the fans and the pump are at max.
So yeah something is strange with this Water-co.....Wait [LTT-voice]: "there is more".
Now let's try to turn on all the devices turned off until now (case LL120 fans, keyboard, as well as motherboard) BUT let's turn off all the water-cooling leds (pump and fans).
The temperature rises very quickly to 31°C ,4 degrees more while these devices literally have nothing in common with the water-cooling,
Now switch on the pump and the last two ML PRO RGB fans.
WOAW now the temperature rises in a supersonic way up to 35°C then goes down gradually to 34.3°C then rises again to 34.6°C, in short the temperature is not stable at all
For the fun I tested different devices 1 by 1, My keyboard does not increase the temperature if it is the only one turned on (fortunately otherwise my brain cells would probably break down).
Let's see for the 4 LL120 of my ICUE 465x and.....Yep once again the temperature goes up to 31°C even if these fans have nothing to do with the liquid
Last on the line the 5 poor little leds of my motherboard asus that once the only one lit do not increase the temperature
And here we are at the end of this hell, we notice that the temperature rises dramatically and my CPU remains in IDLE at 30 ° C so we can put aside the hypothesis of water heating, I think we can move away from the hypothesis of LEDs too close to the sensors of the block, in the block itself I do not know ..., in any case we saw that the LEDs of the LL120 caused the same effect, the same for the ML PRO RGB,
So I'm thinking about a good software problem with icue or a good firmware problem with the h100i pro, I've had it for 2 years now and I never noticed this kind of behavior.
the problem is that the speed of the fans is influenced compared to the value that this sensor returns so above all because it is a cooling fluid temperature 10 ° it is the difference between 800RPM and 2500RPM
if you have any info or question fell free to ask :D:
EDIT : The color chosen for the test was white 255/255/255 but every color as an impact even if white is the one who got the most temp out
