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Drivers & Software

fatp1ngu
Journeyman III

"rcbottom.sys" causing system interrupts and high cpu load on one core

Hello,

I have been experiencing issues with very high CPU load on one core/thread and its constantly pinned to almost 100% in Task Manager:

1.jpeg

I was able to use Process Explorer to see what was running on the core to cause the constant load. This showed me it is System Interrupts:

2.jpeg

Tried updating drivers, removed all USB devices one at a time to see if went down but nothing. Ran Windows Performance Recorder and then Windows Performance Analyser which shows that rcbottom.sys is the one causing the interrupts:

3.jpeg

I do not use RAID (at least not consciously, I've never set it up) and my specs are:

Type Hardware

CPUAMD Ryzen 5900X
Memory4x8GB Corsair Vengeance LPX DDR4 3200 MHz C16
MotherboardGigabyte B550 AORUS ELITE
GPUEVGA RTX 3080 FTW 3 Ultra 10G
PSUCorsair RM850 (2021) - 850W
Main boot driveKioxia LTC10Z480GG8 EXCERIA 480 GB 2.5 Inch SSD
HDD StorageSeagate BarraCuda 2TB 7200 RPM
NVME (for games)Kingston 1TB A2000 M2 NVMe SSD
Operating SystemWindows 11 Pro - Version 21H2
 OS Build: 22000.739

The question I have is - can I remove rcbottom.sys or can I update it? I installed the AMD RAID Utility from my Motherboard's drivers here: https://www.gigabyte.com/Motherboard/B550-AORUS-ELITE-rev-10/support#support-dl-driver

I hoped that would update the driver maybe, but nothing has improved.

I have tried to stop it from running at boot but it then causes a BSOD error with Stop Code: INACCESSIBLE BOOT DEVICE. Windows repair gets it to boot, but it re-activates this so makes no difference.

The constant load is hurting in games, temps etc. so if I could fix it, it would be great. Any help is much appreciated.

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1 Solution
fatp1ngu
Journeyman III

This is now resolved. Feel stupid at how easy it was in the end.

In Device Manager saw that the Storage Controller was a StoreMI one. Went to Update Driver > From Local Files > Selected the Standard AHCI one and thats it.

Reboot and fixed. 

View solution in original post

2 Replies
fatp1ngu
Journeyman III

This is now resolved. Feel stupid at how easy it was in the end.

In Device Manager saw that the Storage Controller was a StoreMI one. Went to Update Driver > From Local Files > Selected the Standard AHCI one and thats it.

Reboot and fixed. 

Nafryti
Journeyman III

I have no idea when this StoreMI driver was installed, but I ended up needing to do this after attempting to run Prime95 and a BSOD happening on rcbottom.sys 

I'm also noticing lower CPU temps at idle in ambient room temps as well.  Would seem the StoreMI driver needs a lot more testing before it's a stable alternative to the old standard driver.

 

UPDATE: I ran P95 for a solid minute without any hiccup in performance or BSOD.  This is blatantly a StoreMI issue, will hope AMD fixes their driver.

I'm FDA Recommended.
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