This page is mainly a reference list pulled together from useful suggestions shared online, along with notes I wanted to keep in one place for future builds and troubleshooting.
It is not meant to be a definitive checklist, but it should be a decent starting point if a vMix system feels inconsistent, unstable or higher latency than expected. Some of these will matter more than others depending on the hardware and workflow.
Section 01
01
General tweak
Where to find it
Windows Settings -> Apps -> Installed Apps -> [App] -> Advanced Options
Recommended setting
Background app permissions -> Never
Prevents non-essential applications from waking up in the background and causing CPU spikes or disk activity during a production.
02
General tweak
Where to find it
Control Panel -> Hardware and Sound -> Power Options
Prevents the CPU from downclocking or parking cores during idle periods, ensuring instant performance when video workloads suddenly spike.
03
General tweak
Where to find it
Power Options -> Change Plan Settings -> Advanced Power Settings -> USB Settings
Disables Windows power-saving behaviour on USB devices.
This prevents capture cards, audio interfaces, and control surfaces from disconnecting or behaving unpredictably during long productions.
04
General tweak
Where to find it
Windows Security -> Device Security -> Core Isolation
Virtualisation-based security can introduce significant DPC latency, which may cause:
Disabling this can noticeably improve real-time AV performance.
05
vMix specific
Where to find it
Windows Settings -> System -> Display -> Graphics -> Default Graphics Settings
For modern NVIDIA GPUs (RTX 30/40 series), enabling HAGS can improve:
Results may vary depending on hardware and drivers.
06
General tweak
Where to find it
Windows Settings -> Gaming -> Game Mode
Allows Windows to prioritise the foreground application and reduce interruptions from updates or background tasks.
07
General tweak
Where to find it
Control Panel -> Power Options -> Choose What the Power Buttons Do
Fast Startup behaves similarly to partial hibernation and can cause driver initialisation issues, particularly with:
Disabling it can improve stability.
08
General tweak
Where to find it
Control Panel -> Sound -> Sounds Tab
Prevents Windows notification sounds from accidentally entering the production audio chain.
09
vMix specific
Where to find it
Windows Settings -> System -> Display -> Graphics
Ensure vMix64.exe is assigned to the dedicated NVIDIA GPU rather than integrated graphics.
Critical for laptops and hybrid GPU systems.
Section 02
01
vMix specific
Where to find it
Device Manager -> Network Adapters -> [NIC] -> Properties -> Advanced
Disabling Interrupt Moderation reduces packet batching and lowers network latency.
Particularly important for:
02
General tweak
Where to find it
Device Manager -> Network Adapters -> [NIC] -> Properties -> Advanced
Disables power-saving behaviour on the network adapter.
Prevents unexpected link-speed changes and network interruptions during bandwidth spikes.
03
vMix specific
Where to find it
Device Manager -> Network Adapters -> [NIC] -> Properties -> Advanced
Recommended setting
Rx & Tx Enabled
This setting can help reduce packet loss in heavy NDI or multi-camera environments.
04
General tweak
Where to find it
Control Panel -> Network and Internet -> Network Connections -> [NIC] -> Properties
Useful on isolated production networks using IPv4-only workflows for NDI or Dante.
Can reduce unnecessary discovery traffic and routing conflicts.
Section 03
01
General tweak
Where to find it
NVIDIA Control Panel -> Manage 3D Settings -> Global Settings
Recommended setting
Prefer Maximum Performance
Keeps GPU clocks high and prevents render-time spikes during demanding transitions or multiview layouts.
02
vMix specific
Where to find it
NVIDIA Control Panel -> Manage 3D Settings -> Program Settings -> vMix64.exe
Recommended setting
Ultra
Reduces frame queue latency between CPU and GPU, improving render latency inside vMix.
03
vMix specific
Where to find it
NVIDIA Control Panel -> Manage 3D Settings -> Program Settings -> vMix64.exe
Recommended setting
Off or Auto
Forcing this on can interfere with vMix's own threading behaviour and create CPU bottlenecks.
04
vMix specific
Where to find it
NVIDIA Control Panel -> Manage 3D Settings -> Program Settings -> vMix64.exe
Recommended setting
Off or Use the 3D Application Setting
Allows vMix to control frame pacing directly.
05
vMix specific
Where to find it
NVIDIA Control Panel -> Manage 3D Settings -> Program Settings -> vMix64.exe
Recommended setting
Prefer Performance
Can improve compatibility and rendering behaviour with older plugins or specific capture hardware.
Section 04
01
General tweak
Where to find it
BIOS -> Advanced CPU Configuration
Disables CPU power-saving states to maintain consistent clock speeds during productions.
Helps avoid sudden latency spikes caused by CPU sleep states.
02
vMix specific
Where to find it
BIOS -> PCIe Settings
Allows the CPU to access the GPU's full VRAM allocation rather than segmented chunks.
Can improve performance in high-resolution or graphics-heavy productions.
03
General tweak
Where to find it
BIOS -> Memory Settings
Ensures RAM runs at its rated frequency and timings rather than default JEDEC fallback speeds.
Critical for memory bandwidth and overall system responsiveness.
Section 05
01
vMix specific
Where to find it
vMix Settings -> Display
Optimises GPU memory handling for large productions with:
If you are using Resizable BAR (ReBAR), this should be disabled. More info
02
vMix specific
Where to find it
vMix Settings -> Streaming / Recording
Uses NVIDIA's dedicated encoder hardware to offload H.264/HEVC encoding from the CPU.
Strongly recommended for most modern NVIDIA systems.
03
vMix specific
Where to find it
vMix Settings -> Display -> Master Frame Rate
Ensure the session resolution and frame rate match the majority of your:
04
General tweak
Where to find it
vMix Settings -> Audio
Windows Sound Control Panel
Recommended setting
48kHz / 24-bit
This prevents real-time sample-rate conversion, which can introduce:
05
vMix specific
Where to find it
Input Settings -> Gear Icon -> General
Reduces internal buffering on capture card inputs.
Useful for achieving the lowest possible glass-to-glass latency with:
06
vMix specific
Where to find it
vMix Settings -> External Output -> External [Gear Icon]
Recommended setting
Low Latency
This reduces buffering for PCIe outputs such as Blackmagic DeckLink and AJA cards.
Particularly important for IMAG, LED walls and live projection.
Helps minimise visible delay and lip-sync issues for in-room audiences.