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H100i v2 rattle / grinding noises, two brand new units

Hi guys, this week I've got two H100i v2 replacements from Amazon for my broken old unit and I've got the same exact issue with both of them.
I'm 100% sure I installed the AIO in the correct way but they do a super annoying rattle noise coming from the water block or the begin of one of the two pumps I can't say. The grinding noises start when it's set to Performance, i've tried to run the AIO for a couple of hour with the PC on its side or to do little hits with my fingers to the pumps and when I do so I hear "air bubbles" moving. Both units were working as expected, no temps issues.
Did I get two unit from a broken batch or what? My old one, bought last year, never did those noises.

 

 

 

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you have to set the pump header voltage to 12V, which is max speed, otherwise you will get the rattling since these pumps wont run properly with less V

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I've tried disabling the cpu controller or set it at PWM turbo mode, no change

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You might have small air bubbles, something similar was happening to my 980 ti hybrid. Tilt the pc (with a book or two) to angle the tubes at the bottom of try and get the air bubbles to top of rad. Do you have it mounted vertically or horizontally?

Mark 16: 15

“And He said to them, ‘Go into all the world and preach the gospel to every creature.'”

Youtube: https://www.youtube.com/channel/UCownI-zKOn2iXg9M5u2aApw

 

My Rig:

CPU: R7 1700

MOBO: Asrock ab350 Pro4

RAM: 8gb (2x4) Corsair 2666 ddr4

STORAGE: 1tb Toshiba HDD; 120 GB Toshiba SSD

GPU: GTX 1080 modded to be hybrid

PSU: CX750M

PERIPHERALS: Logitech G910; G502; Beyerdynamic DT 770; ModMic; Samsung 49in Ultrawide

CASE: Custom Wall Mounted

 

 

 

Other Devices:

iPad Pro 11 inch w/ Pencil

iPhone 11

Samsung Galaxy S8

Nintendo Switch

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10 minutes ago, Abyss Gaming said:

You might have small air bubbles, something similar was happening to my 980 ti hybrid. Tilt the pc (with a book or two) to angle the tubes at the bottom of try and get the air bubbles to top of rad. Do you have it mounted vertically or horizontally?

the radiator is mounted vertically

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1 hour ago, anphetamina said:

the radiator is mounted vertically

Then mount it so tubes are at the bottom and tilt it backwards so the top is leaning back to try and get the bubbles to the top. If it doesnt solve or get better within 1-3 days it probably isnt the cause

Mark 16: 15

“And He said to them, ‘Go into all the world and preach the gospel to every creature.'”

Youtube: https://www.youtube.com/channel/UCownI-zKOn2iXg9M5u2aApw

 

My Rig:

CPU: R7 1700

MOBO: Asrock ab350 Pro4

RAM: 8gb (2x4) Corsair 2666 ddr4

STORAGE: 1tb Toshiba HDD; 120 GB Toshiba SSD

GPU: GTX 1080 modded to be hybrid

PSU: CX750M

PERIPHERALS: Logitech G910; G502; Beyerdynamic DT 770; ModMic; Samsung 49in Ultrawide

CASE: Custom Wall Mounted

 

 

 

Other Devices:

iPad Pro 11 inch w/ Pencil

iPhone 11

Samsung Galaxy S8

Nintendo Switch

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1 minute ago, Abyss Gaming said:

Then mount it so tubes are at the bottom and tilt it backwards so the top is leaning back to try and get the bubbles to the top. If it doesnt solve or get better within 1-3 days it probably isnt the cause

How do I need to place the radiator? I'm not getting what you're trying to tell me.

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5 minutes ago, anphetamina said:

How do I need to place the radiator? I'm not getting what you're trying to tell me.

So the tubes stick out of the bottom.

 Image result for radiator aio

THen tilt the PC back by putting a big book or something in the front below it

Mark 16: 15

“And He said to them, ‘Go into all the world and preach the gospel to every creature.'”

Youtube: https://www.youtube.com/channel/UCownI-zKOn2iXg9M5u2aApw

 

My Rig:

CPU: R7 1700

MOBO: Asrock ab350 Pro4

RAM: 8gb (2x4) Corsair 2666 ddr4

STORAGE: 1tb Toshiba HDD; 120 GB Toshiba SSD

GPU: GTX 1080 modded to be hybrid

PSU: CX750M

PERIPHERALS: Logitech G910; G502; Beyerdynamic DT 770; ModMic; Samsung 49in Ultrawide

CASE: Custom Wall Mounted

 

 

 

Other Devices:

iPad Pro 11 inch w/ Pencil

iPhone 11

Samsung Galaxy S8

Nintendo Switch

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1 minute ago, Abyss Gaming said:

So the tubes stick out of the bottom.

 Image result for radiator aio

THen tilt the PC back by putting a big book or something in the front below it

I can't mount the radiator like that, I have a NZXT s340 and the tubes are too short or hitting the GPU, the only place I can mount the 240mm radiator is on the front panel case.

Is it safe to unmount the radiator and run the system placing the radiator like that outside the case without any fans attached to it? For how many time do I need to run like that to see if the air bubbles move?

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