u/Large-Profession3490

Hi everyone, I’m getting crazy here trying to fix problem. I've been trying for weeks now with no luck.

The Issue: In games (e.g., Arc Raiders), I experience sudden "connection losses." Windows remains connected to the internet, but the game drops or lags out completely for a second. This is NOT frame stuttering; it’s a system-wide interrupt that kills the network stream. It is not an internet issue as I have it only with this PC and also with different internet connections.

The Evidence (LatencyMon & HWInfo):

• DPC Latency: Constant spikes of 1.3ms - 1.4m
• Hard Pagefaults: Over 8,000/sec during gaming.
• SSD Activity: During spikes, my SK Hynix P41 hits 100% activity but speed drops to ~180MB/s.
• Note: The problem persists even when using USB Phone Tethering, so it's not the Realtek Ethernet port or the router. It's internal.

Also WhySoSlow shows this message:

"The highest measured SM BIOS interrupt or other stall was 233 microseconds. This is considered poor behavior. Your system may have difficulty handling multimedia in real-time and may be subject to unexpected stutters and unresponsive behavior."

System Specs:

• CPU: Ryzen 7 7700X
• GPU: RTX 3080 Ti
• MOBO: Gigabyte B650 (latest BIOS)
• RAM: 32GB DDR5 @ 6000MHz
• PSU: Corsair RM750
• OS: Windows 11

What I’ve already tried:

1. Drivers: DDU for Nvidia, latest AMD Chipset drivers, SSD Firmware updated.
2. BIOS: SoC Voltage at 1.2V, Global C-States Disabled, forced PCIe Gen 2 (no change).
3. Network: Disabled all Power Saving, Green Ethernet, etc.
4. Windows: Disabled MPO, MMAgent, set NetworkThrottlingIndex to ffffffff.
5. OCCT: Passed Power, CPU, and SSD stress tests. Hardware seems physically fine.

Any ideas on what could cause such high Pagefaults on a high-end system and kill the network handshake? Could it be a faulty CPU IMC or some weird Gigabyte BIOS setting? Or an hardware issue?

Thank you to everyone who will try to help!!!

(I used AI to help me create the post as english is not my first language)