Why is my watercooling loop not performing?

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antoniosk

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#2636588 16-Jan-2021 19:00

borgia:

Thanks for the help team

I changed some things

- bigger radiator

- static pressure fans (mine were airflow (duh))

- Changed cpu paste and re-seated it

- I had the cpu block the wrong way around, fluid going in through the out hole

- put cpu after radiator getting coolest fluid

Now temp running furmark on the 3080 and Prime95 (no AVX) is 90, which is fine for this CPU. Thanks for the input!

Cheers Ivan

So after all this it runs at 90C?

holy cow my systems shut down when they hit 80

________

Antoniosk

borgia

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#2636597 16-Jan-2021 19:56

The 9900k is a furnace. My chip is clearly not great thermals wise, but prime95 is a very very tough load, and with avx on is crazy. It will only get to 70 in games, which is the point. It thermal throttles at 100.

Cheers Ivan

timmmay

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#2636604 16-Jan-2021 20:22

borgia:

Now temp running furmark on the 3080 and Prime95 (no AVX) is 90, which is fine for this CPU. Thanks for the input!

My Ryzen 5600X is a fairly hot chip. On the stock cooler it reaches 95C running Prime95, or from memory about 75C running more realistic workloads. I put in a Noctua NH-U12S air cooler that keeps prime95 to 65 degrees.

I'm not really seeing the point of water cooling if you still reach 90C. Put a decent air cooler in and your temps should drop 25 - 30 degrees.

Jase2985

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#2636610 16-Jan-2021 20:51

timmmay:

I'm not really seeing the point of water cooling if you still reach 90C. Put a decent air cooler in and your temps should drop 25 - 30 degrees.

lol, no it wont, that CPU is about 2x the wattage your one is. the other thing you have going for you is you are not running a power hungry GPU so your whole setup is light on heat and power.

His water cooling loop doesn't seem to be optimised very well and should be sitting around the 70-75deg mark while being hammered in stress tests.

timmmay

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#2636615 16-Jan-2021 20:57

Jase2985:

timmmay:

I'm not really seeing the point of water cooling if you still reach 90C. Put a decent air cooler in and your temps should drop 25 - 30 degrees.

lol, no it wont, that CPU is about 2x the wattage your one is. the other thing you have going for you is you are not running a power hungry GPU so your whole setup is light on heat and power.

His water cooling loop doesn't seem to be optimised very well and should be sitting around the 70-75deg mark while being hammered in stress tests.

Ah fair enough.

Mehrts

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#2636627 16-Jan-2021 21:42

If I was going to the effort of watercooling, I wouldn't be overly happy with those temperatures even at max chat under synthetic stress tests.

Relatively simple fixes for that though:

1. Separate the CPU and GPU cooling loops.
2. Increase water capacity in the system.
3. Increase surface area of radiator (deeper or longer unit).
4. Increase airflow through radiator.

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Zeon

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#2637636 18-Jan-2021 23:34

How warm is the inbound line after it has passed through the radiator (even to touch) compared with other parts of the loop? Is there any way you can measure the flow rate?

I only tried water cooling once with an all-in-one cooler and after only 4 months it wouldn't actually start with the system. The pump was on the CPU block and I would have to hit it a few times to get anything pumping through. Even then it wasn't great. I feel that the flow rate wasn't really high enough but no ability to check it.

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arcon

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#2638600 20-Jan-2021 09:43

borgia:

I changed some things

- bigger radiator

- static pressure fans (mine were airflow (duh))

- Changed cpu paste and re-seated it

- I had the cpu block the wrong way around, fluid going in through the out hole

- put cpu after radiator getting coolest fluid

Now temp running furmark on the 3080 and Prime95 (no AVX) is 90, which is fine for this CPU. Thanks for the input!

The bigger rad & better fans will have helped. Order of components in the loop makes zero difference, temps equalize in the loop and the system acts as one.

With today's high power components a general rule of thumb is at least a 240 rad per component - a single 360 slimline rad will explain your initial high temps... was it a 25mm? How thick is your new rad?

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