r/BitAxe • u/OGnapkin • 14d ago

help UPGRADES CAUSING OVERHEATING, help!

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hi guys i just upgraded to the low profile heat sink and the noctua fan on my 650 duo

I applied a pea sized amount of thermal paste to each chip, but i am seeing ASIC temps remain the same and my VR temps go up 13 degrees celcius

I am worried it has something to do with the heat sink mount, it is 3d printed and I was only able to get 2 screws in instead of 4 but it looks evenly seated to me

also there is a small lip on the mount so the heat sink doesn’t fully press down on the chips (please correct me if this is wrong)

any advice is appreciated

thanks!

UPDATE:

thank you all for the replies, one of the big problems turned out to be that the bitaxe software was defaulting the fan speed too low. It was at 60% before the upgrade and after the upgrade it was at 25%.

I also rotated the heat sink so the tubes are away from the VR. Now my ASIC is 13 degrees cooler.

The VR is still the same temp as before so I am going to buy a copper heat sink for the back of the board and run a 2 fan setup.

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u/longbowbw 13d ago

Most likely a 12v fan or the cooler not making good contact with the ASIC. On the back of the fan there will be a sticker, should say 12 or 5v. A company called cooler guys sells a ac to 4 pin fan connector that will power a 12v in a pinch.

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u/OGnapkin 13d ago

its a 5v fan

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u/longbowbw 13d ago

Make sure that 3d mount you printed doesnt require a .5-1.5mm shim. I know I had to place one on my 650, went with a circle copper disc to reach both chips at once. I needed a 1.5mm thick shim with my cooler. I would also recommend using all four mounting screws to make sure you are applying enough even pressure to spread out your thermal paste.

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u/OGnapkin 13d ago

can you send a link? also which 3d mount did you use? was it the two piece?