Display & GPU Configuration

GFN rigs use virtual displays with EDID emulation to present configurable resolutions to games, while the actual output is captured and streamed to the client.

Official Seat Mapping Snapshot (NVIDIA, No Alliance)

For official server-side rig/tier mapping from rollout variables and spec snapshots (dated October 31, 2025), see:

• Official GFN Seat Specs

Display Activation

At boot, displaysetup.bat activates the virtual display:

c:\asgard\tools\GameSeatDisplay\GameSeatDisplay.exe --activate-display

Supports Windows Server 2019 and 2022.

EDID Emulation

The forcedisp tool injects custom EDID data to make games see specific monitor profiles:

EDID Profile	Resolution	Refresh Rate	Use Case
asus_rog_1080p	1920x1080	60 Hz	Default
NvidiaVGX_1080p_120	1920x1080	120 Hz	High refresh
NvidiaVGX_1080p_240	1920x1080	240 Hz	Ultra refresh
NvidiaVGX_1440p_120	2560x1440	120 Hz	QHD high refresh
NvidiaVGX_1600p_120	2560x1600	120 Hz	QHD+
NvidiaVGX_4K_120	3840x2160	120 Hz	4K premium
NvidiaVGX_UW_3440x1440	3440x1440	—	Ultra-wide
NvidiaVGX_UW_3840x1600	3840x1600	—	Ultra-wide+

Resolution Management

setResCap.py modifies NVIDIA driver registry keys to cap available resolutions:

• Registry path: HKLM\SYSTEM\CurrentControlSet\Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}
• Registry value: NV_R&T for resolution constraints
• Default cap: 1920x1080

Resolution Feature Flags

From GameStream config, resolution support is controlled per-SKU:

Flag	Description
Enable4k	3840x2160 support
Enable1440p	2560x1440 support
Enable1600p	2560x1600 support
EnableUWResolution	Ultra-wide support
HdrSupported	HDR output
Allow120FpsModeSet	120 FPS mode
AspectRatio4To3Supported	4:3 aspect ratio

These are enabled for premium SKUs (ReservedSKU setting group).

Dual Display

setDualDispReg.py configures dual-display support:

• Registry value: RMDisableDisplay set to 1 on NVIDIA boards
• Used for surround/multi-monitor gaming scenarios

GPU Detection

checkgpu.py validates GPU presence:

1. Runs devcon.exe to enumerate display devices
2. Checks for NVIDIA GPU in device list
3. Reads driver version from registry: HKLM\SOFTWARE\NVIDIA Corporation\Installer2\Stripped
4. Falls back to wmic path win32_VideoController on failure

GameStream Encoder Settings

From the master config, encoding is highly tunable:

Global Settings

Setting	Value	Description
StreamServerMode	2	Native RTC for all clients
EnableOneStreamer	1	Single streamer mode
EnableNativeRtcSeparateStreams	1	Separate audio/video streams
DynamicFrlFramePacing	1	Dynamic frame rate limiter pacing
EnableStreamerMinidump	1	Crash dump collection
NvRtcStreamerNoSignalingTimeout	1	Timeout on no signaling

Conditional Settings

Condition	Setting	Description
Instance is half-GPU	SkipVideoEncoderPerfCheck=1	Skip encoder perf check
Instance is half-GPU (L40)	Av1Disable=1	Disable AV1 encoding
Client is Windows/macOS	EnableGrc=1	Enable GRC (Game Ready Check)
Client is TV (Tizen/WebOS) 4K	HevcEnable=1	Force HEVC for TV clients
macOS/Windows clients	Frame pacing min 7936us	~126 FPS cap
4K60 specific games	allowOverrideEncoderMultiPassFor4k=1	Disable 2-pass for perf

Surround Browser

Enabled for native clients (Windows/macOS) version >= 2.0.52.0:

surroundBrowser=1
separateMicStream=1

GPU Tracing

gpuviewtool/log.cmd provides comprehensive GPU tracing:

• Traces: FBC, NVStreamer, D3D11, D3D12, DXGI, DWM
• Buffer sizes scaled to physical memory
• Stack capture for performance analysis

Core Parking

Disabled at boot via disable_core_parking.bat:

powercfg -setacvalueindex SCHEME_CURRENT SUB_PROCESSOR CPMINCORES 100

This ensures all CPU cores are available for game processing — no cores parked for power saving.