Hi all, I recently completed my first watercooled build. Its doing great, but I have a question regarding temperature fluctuations.
When at idle, the cpu sits around 21c, the gpus on 25c. When I render something, the cpu jumps up to 55-60c & holds there until it's done. As soon as it returns to idle, the temp drops down to 30ish, then back to low 20s after a minute or so.
My question is, is this big a variance in a short period of time bad for the cpu?
Hi :)
What is the system, are the CPU and the GPU in the same loop, how is the loop going, i mean from the reservoir is going where? 20-25 is fine, but that means the room is 10C or something... And what is the cooling configuration? In general, how many rads with how many fans on what speed etc, because 60C in water cooling loop sounds like FX 9590...
this is normal.
This should have no effect on temps as unlike in a car where you deal with extreme temperature differences before and after the radiator, in a PC watercooling loop you will see the temps as a whole go up and down and it will average itself out along the length of the loop. Jay has done numerous videos explaining this.
This looks like pretty normal behavior (obviously depending on how many rads, how much oc, etc.)
This doesn't matter. The thermals will balance out throughout the entire loop after it's had enough time to stabilize. This type of fluctuation is pretty normal especially if the gpu is on the same loop as the cpu.
Also Intel CPUs tend to shift around on thermal readouts quite a bit between load and idle because of where the sensors are located in relation to the cores.
Thanks for the responses.
It's a single loop, rad into CPU then into GPUs. I'm using a single 540 with 3 180mm fans. CPU is a 6700k @ 4.6.
The temperature on the GPUs is stable & stays in the 20s- 40s when gaming, its just the CPU that moves around a lot depending on load.
Yeah those temperatures are fine. My temperatures can range from 30c to 80c on my xeon depending on the task its handling or the amount of hot air being output from my graphics card which is then sucked through the cpu cooler. As long as its under 105c, your good to go. Don't worry at all, most people wish they could get temperatures that great out of a 6700k at those clock speeds.
Pretty normal, my guess is you have the loop going into GPU then CPU? maybe without a radiator in between. Basically 21c water goes thru into a 60-70c GPU and gets heated to around 35-40c since you don't have radiator in between to bring that down 2-3 degrees it goes right into the CPU, since your CPU is OC'ed it's adding maybe additional 5-10c into the water bringing the temp to register 55-60c, dumps into reservoir or radiator afterwards and probably cools down to around 30c water ready for another loop around.
For lower temps, and less restriction go res ---> pump --> radiator 1/2 ---> CPU ---> radiator 2/3 ---> GPU ---> res.
Get a temp probe. Keep in mind the plastic tubes and pump deform at around 50c.
The order of the loop does not matter. The temperatures will average themselves out along the length of the loop regardless of placement of components. Jayztwocents has done multiple videos and discussions on this. As far as restriction goes, the pump is pushing the water through the same components so order won't affect it there either. Order doesn't matter when you push a 50lb block and a 20lb block for instance, so order doesn't affect the restriction here (unless of course you run 2 pumps which could affect restriction).
^ This. The GPU only Idles 4c warmer because the GPU is a hotter component, and the load temps for both your cpu and gpu are completely fine as I said and Boots reiterated.