Hello,

I recently upgraded my system disk from a WD Blue (SATA M.2 256GB) to a GIGABYTE AORUS Gen4 7300 2TB. Since the swap, I'm experiencing very strange CPU behavior on both Windows 11 and Arch Linux.

The Problem:

• Idle Temps: 60-65°C (previously 30-35°C on the old disk).
• Load Temps: On Cs2 hits 90°C+.
• "Ghost" Load (With PBO and CBP): Resource Monitor shows 100% CPU Utilization, Task manager shows 4.2GHz clock speed but usage isn't exceeding 25%.
• C-States: HWiNFO shows Core C0 Resident at 100% and C6 at 0%. The CPU never enters sleep states.
• Stability: If I enable PBO and Core Boost, the system sometime crashes or idles at 85°C.

If I swap back to the old SATA M.2 disk, everything returns to normal (30°C idle, normal CPU usage reporting). Despite the 100% CPU report on the new disk, the system feels snappy, mouse cursor doesn't lag, and in-game FPS is similar to my old setup.

My Setup:

• CPU: AMD Ryzen 5 3600
• GPU: GeForce RTX 2060 Super
• MB: MSI B450-A PRO MAX (Latest BIOS updated)
• New Disk: GIGABYTE Aorus PCIe Gen 4 7300 (Running at Gen 3 mode in BIOS)
• RAM: 32GB (2x8GB Kingston pairs)

What I've tried:

• Updated BIOS to the latest version.
• Installed latest AMD Chipset Drivers.
• Forced PCIe Gen 3 in BIOS for the M.2 slot.
• Checked NVMe Firmware (it's up to date).

Is it unavoidable because of the NVMe Gen 4 or is there something I can do? I would really appreciate any help.