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DPC latency from Storport.sys

Hello, I just joined the site because I'm having exactly the same issue.
I followed the exact steps you layed out and here is my ETL file.

https://www.dropbox.com/s/h0e93gvuha9tg2n/CPU.rar?dl=0

Thanks.
There are few huge DPC spikes in the storage subsystem:

Capture.jpg

They seem to be coming from amd_sata.sys driver, which belongs to AMD SATA Controller. Installing the latest Chipset driver from Support & Drivers should solve the issue. If it doesn't, please create a new thread and we'll continue troubleshooting this.
 

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