#Radiator fan 2 not spinning, CPU temp spikes and crashes when gaming

17 messages · Page 1 of 1 (latest)

blazing jolt
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Had this PC for 2 1/2 years, I don't think I've ever seen the 2nd (lower) radiator fan spin. I assumed it was reserved for high temps but now it's being pushed and I still don't see it turning on. Diablo 4 has been running at consistently around 95C (the game is causing similar issues for others too, but anything I can do to fix my own pc issues must help.)

Looked at the BIOS and 'CPU FAN' is spinning at max consistently.
'PUMP' fan is at 0%. Looking at the mobo (see picture attached) this is surely because nothing is plugged into the 'PUMP FAN 1' socket - I assume there should be? The CoolerMaster manual suggests so. I got the pc pre-assembled from Cyberpower, was I sent an unfinished product and have only just realised? I can't see where the wires coming out of the radiator go... but also, why would that only affect 1 of the two large radiator fans?
I'm stumped. Help!

CPU: AMD Ryzen 9 3900X - 12-Core 3.80GHz, 4.6GHz Turbo - 64MB L3 Cache Processor, Pro OC Compatible (No On-board Graphics) [+75]
**Fan: **FAN: Cooler Master Masterliquid Lite 240 Liquid Cooling System w/ 240mm Radiator, Extreme OC Compatible (Cooler Master CPU Water Cooling, Extreme OC Compatible)
GPU is a RTX 3080 and that's managing fine.

IMG_20230610_200828.jpg
blazing jolt
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possibly relevant screenshots from liquid cooler manual

image.png image.png
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and the motherboard

image.png
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I'm noticing now that the Mastercooler says on the specs table under 'Pump', '3 pin connector', and i dontsee any relevant 3 pin socket on the motherboard diagram. Could something omnt be connected that should be? Are these maybe incompatible with each other?

old cipher
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You probably have always had a cable unplugged

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check your mother board sys_fan headers first

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Don't do anything without turning it off though and unplug the power supply

blazing jolt
blazing jolt
civic locustBOT
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cprgbglitch :tada: Congrats @blazing jolt, you levelled up to 1! :tada: cprgbglitch

old cipher
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Stuff happens like this in the shipping process

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It must of been perfectly working when they built it, regardless its an easy fix

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Locate where the fan is plugged into then unplug the fan and reconnect it, should fix it

blazing jolt
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Did it!

IMG_20230611_014006.jpg
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Both fans spinning now. Can't believe this was disconnected round the back for a whole 2 and a half years. My previous pc was home built and all the wires were visible. Didn't realise I could take the back panel off this thing... I was defeated by good cable management 🙃

blazing jolt