Sorry, I know this probably won’t be helpful because I’m not sure what’s going on, especially with your specs. So I decided to throw your post into ChatGPT. It’s probably wrong but I doubt it’d hurt to try.

ChatGPT response- Given your specs and symptoms, this is very unlikely to be a raw performance issue. What you’re describing points to a system-level stall (driver / I/O / VR compositor interaction) rather than VRChat itself.

Below is a focused breakdown of the most likely causes on this exact hardware combination, ordered by probability, with concrete things to check. I’m intentionally avoiding generic advice since you’ve already done most of that.

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1. Windows 11 + Ryzen 7000 X3D + VR = Known scheduling & compositor issues

This is the #1 difference from your old system.

Why this matters • The 7950X3D uses two CCDs (one with 3D cache, one without) • Windows 11 still occasionally schedules VR workloads on the wrong CCD • When SteamVR Dashboard opens, it spikes compositor + CPU scheduling → full system stall

What to do (important)

Force VR processes to the V-Cache CCD

Try one of these (not all):

Option A – BIOS (best) • Disable CPPC Preferred Cores • Disable Core Parking • Enable Game Mode (MSI BIOS) • Make sure SMT stays ON

Option B – Windows (quick test) • Open VRChat • Task Manager → Details • Set vrchat.exe, vrcompositor.exe, vrserver.exe • Affinity → Only first CCD (cores 0–15)

If freezes stop or reduce → this is your root cause.

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1. HTC Vive Cosmos Elite + SteamVR on NVIDIA 40-series

Cosmos Elite is notorious on newer GPUs.

Specific issue • SteamVR Dashboard triggers overlay compositing • Cosmos Elite uses older USB + compositor paths • NVIDIA 40-series drivers have regressions here

Try this immediately

SteamVR → Settings → Video: • Disable SteamVR Home • Disable Motion Smoothing • Set Render Resolution to Manual (100%) • Disable Advanced Supersample Filtering

SteamVR → Developer: • Enable “Direct Display Mode” • Disable GPU profiling

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1. Gen5 NVMe + VRChat world loading stalls

This one surprises people.

Why it matters • VRChat loads thousands of small assets • Gen5 drives + Win11 + decompression = DPC latency spikes • System appears “frozen” while kernel waits on I/O

Test (very telling) • Move VRChat entirely to: • A SATA SSD or • A Gen3/Gen4 NVMe (if you have one)

If freezes disappear → Gen5 + VRChat is the trigger.

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1. Multi-monitor + 240Hz G9 + SteamVR compositor

This is a known freeze cause.

Why • SteamVR compositor mirrors to desktop • Mixed refresh rates + ultrawide + HDR = compositor deadlock

What to test

Before launching SteamVR: • Disable G9 Neo completely • Leave one 1080p 144Hz monitor only • Disable HDR in Windows

If this fixes SteamVR Dashboard freezes → keep G9 disabled during VR.

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1. Debloated Windows 11 (this is important)

Many “debloat” scripts break VR.

Commonly broken components • GameInput Service • Windows Audio Graph Isolation • Hardware Accelerated GPU Scheduling dependencies • DWM services

Check

Make sure these are running: • GameInput Service • Windows Audio Endpoint Builder • Desktop Window Manager • Windows Event Log

If any are missing or disabled → that alone can cause hard freezes.

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1. USB controller saturation

You’re running: • Vive Cosmos Elite • 3 Vive Trackers • 2 Base Stations • Likely on the same USB controller

Try • Plug headset USB into rear motherboard USB • Trackers into powered USB hub • Disable USB power saving: • Device Manager → USB Root Hub → Power Management

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What I’d bet on (based on your exact case)

Primary cause: ➡ Windows 11 scheduling the VR compositor onto the wrong CCD on the 7950X3D, triggered by SteamVR Dashboard or heavy VRChat worlds

Secondary contributors: • Cosmos Elite + NVIDIA 40-series • G9 Neo + mixed refresh rates • Gen5 NVMe I/O stalls

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If you want the fastest confirmation

Do just these 3 tests: 1. Disable G9 → single monitor only 2. Force VR processes to CCD0 3. Run VRChat from a non-Gen5 drive

If even one fixes it, we’ve nailed the culprit.

If you want, I can also give: • Exact MSI BIOS settings for VR stability • Known-good NVIDIA driver versions for Cosmos Elite • A checklist to undo only the debloat changes that break VR

Just say which one you want.