High water temperature O11D Evo Reflection 2 Distro

LuckyBenski said:
Sunlight is a good shout - maybe the sensor itself is black and in sunlight?

Water won't flow without a pump so even with sunlight I wouldn't expect the water temp to go up much.
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Thanks for the thoughts. PC is in a fairly small warm room at 23c currently but it is in complete shade. The sensor is black yes. Such strangeness. When the pump starts from PC off the water temp goes quickly to about 30c idling. Maybe it just isn’t accurate. It’s an Aquacomputer next flow which are meant to be pretty good. I don’t know ‍♀️
 
0121danwilliams84 said:
Thanks for the thoughts. PC is in a fairly small warm room at 23c currently but it is in complete shade. The sensor is black yes. Such strangeness. When the pump starts from PC off the water temp goes quickly to about 30c idling. Maybe it just isn’t accurate. It’s an Aquacomputer next flow which are meant to be pretty good. I don’t know ‍♀️
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Ah! Sounds like the sensor itself is warning up for some reason. I get the same behaviour if my pump stops - CPU reads high, and as soon as the pump kicks in and the warm water flows out, it drips to ambient because the water is ambient.
 
It could be the sensor
Though even at idle you're putting heat into it
At idle according to my aida sensor
My gpu is 40w
The cpu is almost impossible to get to true idle
It's bouncing around
Unless I use task manager to shut down
Every possible background program
It's going from 30w to 100w
Say 100w as a rough guess for both
That probably will increase coolant temperature in few minutes
Should say I have high performance power settings on
Which probably has an effect too

Unless you try a different sensor
Going to be difficult to tell if it's the sensor or not
Aqua computer are good but doesn't mean
It couldn't be faulty I guess
 
Yeah I mean I'm running old tech other than GPU, however, right now, it's 26.3C in my room and the water temp is showing as 28.2C in the loop at windows just doing normal stuff, watching youtube, copying files etc. Will run furmark for maybe 10-15 minutes to see what mine goes to!

EDIT:Ok, so, CPU drawing 202W on full chat and GPU (GPU chip draw + whatever isn't shown on GPUZ?) at 345W so allowing additional from GPU +50W and board etc, lets say what, 700W going through whole system maybe, ran at 44.1C and stayed there so that's a delta of what 16C increase... bit toasty but that's maxed to the hilt to be far with the CPU running AIDA FPU and FurMark on stress test as well... not exactly real world but a worst case scenario... still higher than I thought it may go but christ the heat it generates is mental! Not sure I'd want the piping to go going to 50C though for me, that'd be unacceptable and I'd simply declock if it goes above 45C... I'd prefer to play safe!

That's with 360mm + 240mm + 240mm slim rads with 7 x 120mm fans going but negative pressure as all are exhausting heat out through rads... they are silent fans though tbh and not the best... also I will admit the GPU is bouncing off that 108-110C hot spot...

Processor: Intel E5-Xeon 1680 V2 8 Core/16 Thread @4605MHz Ivy Bridge (1.350v) EP/EX
Motherboard: Asus Sabertooth X79 TUF Gaming
Graphics Card: Liquid Devil water cooled 6900XT @2635/2150/1.175v
RAM: 64GB Kingston HyperX DDR3 1866mhz Quad Channel (3732mhz) @9-10-9-28-1T
PSU: Leadex Super Flower 1600W GOLD 90+
SSD & Storage:
• 1 x Sabrent 2TB Rocket NVMe PCIe 4.0 M.2 (3,500MB/s Read & Write, Windows OS/Applications)
• 1 x Sabrent 2TB Rocket NVMe PCIe 4.0 M.2 (3,500MB/s Read & Write, Games Drive)
• 2 x Samsung 840 Evo Pro SSD in RAID0 (Clone of main Windows OS/Application Drive)
• 2 x 10TB Seagate Barracuda Pro, 7,200RPM HDD (Backup Drive with downloads and archiving)
• 1 x 4TB Seagate ST4000DM001, 5,900RPM HDD (Backup Drive with downloads and archiving)
 
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I've got an aquacomputer High Flow 2 and I know that you can adjust the offset of the temperature reading in Aquasuite software. I'd be tempted to stick a thermometer in the water and set the temp sensor according to that. My water temp in summer @Idle is between 30-31'c. My water temp goes up to 36'c when gaming. I've just cleaned my loop and it brought down the GPU temps 40'c on load. I think the thermal paste was dried out (but I also cleaned the internals of the GPU block with toothpaste). My room temp is 26.4'c.

I have 480mm radiator with 3 x 140mm fans on front intake & a 360mm top. They are all noctua fans and I have the 120mm at 100% when the water temp goes above 31'c right now. I have the Dual EK D5 pump.

5900x EK momentum waterblock
MSI B550 tomahawk
6800xt AMD reference with EK waterblock
32GB 8-pack teamgroup b-die DDR4 ram
850w Asus Rog Thor PSU
2 m.2 drives
3 sata SSD drive
1 WD gold 10TB with freefilesync to have two copies of my data.
 
Thanks for the different perspectives and examples. Perhaps my temp sensor is not completely accurate and I may do some further testing on that. I have been working on reseating my GPU and refreshing the coolant, so will see if that makes any difference as well!
 
yeah we all are kind of
at the mercy of whether your temp sensor is accurate or not
mine currently says 29c just browsing
and doing basic stuff but weathers bit warmer now
somewhere i have an infra red sensor/thermometer (covid purchase)
thats supposedly factory calibrated
it did read my forehead temperature at 37c
wonder what would happen if aimed it
at the coolant in my distro?
or would the acrylic interfere with the measurement?

though end of the day
we are putting an awful lot of watts into
a litre or maybe 2 of coolant
 
LuckyBenski said:
Infrared sensors read surfaces yeah so it typical will show you the temperature if your reservoir I think.
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Yeah wasn't sure if it would
Go through the acrylic
And read the coolant instead
Unfortunately not got a tube reservoir any more
Or could just have taken the top off that
And aimed directly at the coolant
Will probably dig the thing out later anyway
Just out of curiosity
At least with that I can sort of double check
Though I know forehead temperature might vary by a couple of
Degrees C
Might not necessarily be 37c
But my fridge has digital temperature control
So if it reads inside the fridge same temperature as fridge says it is
That would be another sign of accuracy
 
Ex-analytical chemist here...

It's definitely worth a test, but I would be wary of assuming that one device is any more accurate than another if you've bought relatively cheap, consumer grade stuff. Factory calibration might get you slightly closer to the truth, but unless it comes with a calibration certificate that shows ISO/UKAS accreditation then I'd be taking anything they say with a shovel full of salt!

For the most part, manufacturing is beyond *that* level of trash making it to the market, but just something to think on. If you can get a tube res open though, it will be interesting. Be aware though, if it's a clear liquid/plain tap water then you might also struggle to get a read as well. The material of the res itself won't be too far off liquid temp though if you can get a read on that.
 
Yeah I wouldn't assume
Something off the shelf would be
As accurate as a very expensive scientific instrument
That's why I would test it against anything
I knew should be a certain temperature
Ie my fridge says 4c
Which in itself may be inaccurate lol
But if the infrared agrees with 4c
And says my forehead is 37c or very close to 37c
Then it gives a bit more confidence in the infrared devices accuracy
I think the infrared carries some sort of factory calibration certificate
But to what standard I don't remember

Good point about clear coolant
Mine isn't clear
But not had the chance to find where I put the infrared thing yet
 
One easy way to check multiple sensors would be the (relatively) inexpensive but complicated to do next to a PC.
One glass full of ice cubes and water. Should report very close to 0C.
Another recipient with boiling water, should be very close to 100C.
Normally works with kitchen probes and should work with sensors.
Once did with a bunch of watercooling sensors and was pretty close. Obviously, if one reports abnormally, it will be useless.
If going for a single sensor, I always opted for reservoir. When using multiple sensors across the loop, depending on flow rate and heat dissipation, I noticed 1 to 2C between intake and output of a GPU.
 
So, I got out the infrared gun and noticed about a 5c difference between reported water temp from sensor and temp from gun after firing it all over various points of the reservoir (not on the water itself.) The gun showed about 5c lower than sensor. Not sure if that is accurate. Tested on a glass of ice water and the actual water was -1 and the glass showed 7c.

I also reseated the GPU block and now there is about a maximum 10c difference between core and hotspot temp, so slightly better results. Really can't tell any difference on the core temp though.

As expected, reseat didn't affect the displayed water temps on the sensor at all.
 
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0121danwilliams84 said:
So, I got out the infrared gun and noticed about a 5c difference between reported water temp from sensor and temp from gun after firing it all over various points of the reservoir (not on the water itself.) The gun showed about 5c lower than sensor. Not sure if that is accurate. Tested on a glass of ice water and the actual water was -1 and the glass showed 7c.

I also reseated the GPU block and now there is about a maximum 10c difference between core and hotspot temp, so slightly better results. Really can't tell any difference on the core temp though.

As expected, reseat didn't affect the displayed water temps on the sensor at all.
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How were your temps yesterday?
Very close to 30c here yesterday though guess
Other parts of UK may have been cooler
 
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