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h115i weird temp spikes with Ryzen 7 1800x?


dave88
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My setup

Ryzen 7 1800X

Corsair H115i

X370 Gaming Pro Carbon mobo

Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 3200MHz (capped at 2133)

2x 500GB SSD

Windows 10 64 Bit

 

I'm using the latest Ryzen Master software v 1.0.1.0239 since there's a 20c offset with other software.

 

Bios is up to date: 7A32v18

 

Setup:

3 system fans in front as intake. Radiator is mounted on the top as exhausts. One fan in the top back as exhaust as well.

 

I got the both radiator fans plugged into the pump splitter. USB plugged into USB 2 on mobo. 3 pin from pump plugged into cpu header.

 

Issue:

The idle temps are not steady. It jumps to around 44-49c and then drops 1-2c every second until it reaches about 35c and then it spikes up again. This cycle keeps repeating.

 

All 4 screws are pretty tight. Anyone else experiencing unsteady temp readings? What could be the issue?

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I would first make sure your that your motherboard is supplying a constant 12v to your 115i’s pump. See How to properly power your pump.

 

The H115i is SATA powered rather than being powered from the CPU_FAN header so the post you have linked to is not applicable and the H115i will always get the constant +12 volts that it needs directly from the PSU. The H115i manual is incorrect, see http://forum.corsair.com/forums/showthread.php?p=901674.

 

dave88, it would be easier/possible to help you if you posted the CL 4.8.0.82 [Home] tab so we can see all the temperatures and fan speeds.

 

It would also help if you used http://forum.corsair.com/forums/profile.php?do=extra to complete your system specs rather than posting some of them.

 

See http://forum.corsair.com/forums/showthread.php?p=853900 for how to attach a file/screen image to a post.

Edited by red-ray
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The H115i is SATA powered rather than being powered from the CPU_FAN header so the post you have linked to is not applicable and the H115i will always get the constant +12 volts that it needs directly from the PSU. The H115i manual is incorrect, see http://forum.corsair.com/forums/showthread.php?p=901674.

 

dave88, it would be easier/possible to help you if you posted the CL 4.8.0.82 [Home] tab so we can see all the temperatures and fan speeds.

 

It would also help if you used http://forum.corsair.com/forums/profile.php?do=extra to complete your system specs rather than posting some of them.

 

See http://forum.corsair.com/forums/showthread.php?p=853900 for how to attach a file/screen image to a post.

 

Thanks for the detailed response.

 

So is this how I set it up?

- The two 140mm radiator fans plug into the pump cable that has a splitter.

- The 3-pin cable from the pump connects to my fan hub that goes to SATA on PSU.

- The USB cable from pump plugs into a USB header.

 

So all I need is a PWM fan hub to control the fans right?

Or would the USB from the pump be able to control the fans even though it's connected to a fan hub to a SATA port in the PSU?

 

Thanks in advance!

1441947868_CorsairLink.thumb.png.f04847e04ef074e283ac344ccf7193d5.png

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  1. The 2 x 140mm 4-pin PWM fans connected to the H115i Y cable can be controlled via the USB connection.
  2. Both 4-pin PWM fans should run at the same speed, but only one speed is reported.
  3. The SATA power cable from the H115i should be connected to the PSU.
  4. The 3-pin connector with a single wire should be connected to the CPU_FAN header and the reported speed will be half the pump speed.
  5. The H115i USB cable should be connected to a USB header.
  6. I am unclear why you think you need a PWM fan hub.

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Issue:

The idle temps are not steady. It jumps to around 44-49c and then drops 1-2c every second until it reaches about 35c and then it spikes up again. This cycle keeps repeating.

 

All 4 screws are pretty tight. Anyone else experiencing unsteady temp readings? What could be the issue?

 

It is important to set the cooler up properly, however the cyclical nature of what you are describing has the characteristics of a program running in the background creating CPU activity. Overly slow fans or a pump might create higher than expected temps, but they would be steadily higher and not cycle. Poor contact, bad TIM application, etc. will create dramatic CPU temps spikes, but it would not be overly cyclical either. With voltage stepped down, it might seem a bit high, then when any core does a task you would see sizable spikes. Too much TIM will created random CPU temp spikes as the bubbles in the TIM expand and pop.

 

It seems like you might be looking for OS or motherboard specific software messing about in the background. Start with the task manager and see what's going on when this happens. Still a good idea to make sure your wire and cables are hooked up properly, regardless.

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