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WinSux replaces all power plans with a single custom plan derived from Ultimate Performance, locks the CPU to 100% state at all times, disables power management on every enumerated device, and installs a timer resolution service to minimise scheduling jitter.

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Power plan

WinSux duplicates the built-in Ultimate Performance scheme using a fixed, memorable GUID, activates it, and then deletes all other power plans from the system. 
# Duplicate Ultimate Performance (e9a42b02-...) as a custom GUID
powercfg /duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61 99999999-9999-9999-9999-999999999999

# Activate the new plan
powercfg /SETACTIVE 99999999-9999-9999-9999-999999999999

# Delete all other plans (including the originals)
$plans = powercfg /L
foreach ($plan in $plans) {
    powercfg /delete $plan
}
Hibernate, Sleep, and Fast Startup are all disabled: 
powercfg /hibernate off

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power]
"HibernateEnabled"=dword:00000000
"HibernateEnabledDefault"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Power]
"HiberbootEnabled"=dword:00000000
The Sleep and Lock options are also removed from the power button flyout menu: 
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FlyoutMenuSettings]
"ShowSleepOption"=dword:00000000
"ShowLockOption"=dword:00000000

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CPU settings

All processor power management settings are applied to both AC (plugged in) and DC (battery) index values.
SettingValueEffect
Minimum processor state100%CPU never clocks down, even at idle
Maximum processor state100%CPU cannot be throttled below maximum frequency
System cooling policyActiveFan runs actively; passive (throttle-before-fan) disabled
Core parking minimum100%All CPU cores remain unparked at all times
Core parking maximum100%Parking upper bound also set to 100%
The core parking settings (0cc5b647 and ea062031) are hidden by default. WinSux unhides them before writing: 
# Unhide core parking min
reg add "HKLM\System\ControlSet001\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\0cc5b647-c1df-4637-891a-dec35c318583" /v "Attributes" /t REG_DWORD /d "0" /f

# Unhide core parking max
reg add "HKLM\System\ControlSet001\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\ea062031-0e34-4ff1-9b6d-eb1059334028" /v "Attributes" /t REG_DWORD /d "0" /f

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Power throttling

Power Throttling is disabled system-wide. This prevents Windows from reducing CPU frequency for background processes: 
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerThrottling]
"PowerThrottlingOff"=dword:00000001

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Sleep and display

SettingValueEffect
Sleep after0 (never)System never sleeps automatically
Hibernate after0 (never)System never hibernates automatically
Hybrid sleepOffNo hybrid sleep state
Allow wake timersDisabledScheduled tasks cannot wake the system
Turn off display after600 seconds (10 minutes)Display turns off for OLED burn-in protection
Display brightness100%Full brightness at all times
Dimmed display brightness100%Dimmed state also set to full brightness
Adaptive brightnessOffAmbient light sensor does not adjust brightness
Start menu power buttonShut Down (2)Power button shuts down instead of sleeping

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USB settings

The Hub Selective Suspend timeout setting is hidden by default and is unhidden before being set: 
# Unhide hub selective suspend timeout
reg add "HKLM\System\ControlSet001\Control\Power\PowerSettings\2a737441-1930-4402-8d77-b2bebba308a3\0853a681-27c8-4100-a2fd-82013e970683" /v "Attributes" /t REG_DWORD /d "0" /f

# Unhide USB 3 Link Power Management
reg add "HKLM\System\ControlSet001\Control\Power\PowerSettings\2a737441-1930-4402-8d77-b2bebba308a3\d4e98f31-5ffe-4ce1-be31-1b38b384c009" /v "Attributes" /t REG_DWORD /d "0" /f
SettingValueEffect
Hub Selective Suspend timeout0 msNo delay before suspend is considered; combined with suspend disabled below
USB Selective SuspendDisabledUSB devices are never suspended to save power
USB 3 Link Power ManagementOffUSB 3 ports do not use link-level power saving

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PCI Express

# PCI Express - Link State Power Management: Off
powercfg /setacvalueindex 99999999-9999-9999-9999-999999999999 \
  501a4d13-42af-4429-9fd1-a8218c268e20 \
  ee12f906-d277-404b-b6da-e5fa1a576df5 000
PCI Express Link State Power Management is set to Off. This prevents PCIe devices (including GPUs and NVMe drives) from entering lower power states.

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GPU-specific power settings

These settings are applied to the active power plan via powercfg and cover vendor-specific sub-settings that appear only on systems with the relevant hardware.
GPU vendorSettingValue
IntelGraphics power planMaximum Performance (2)
AMDPower slider overlayBest Performance (3)
ATIPowerPlay settingsMaximize Performance (1)
AllSwitchable Dynamic GraphicsMaximize Performance (3)

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Device power savings

WinSux iterates over all enumerated devices in four bus classes and disables every power management option on each one.
Applied to all keys under HKLM:\SYSTEM\ControlSet001\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}:
Registry valueDataEffect
PnPCapabilities24Disables wake-on-LAN and power management
AdvancedEEE"0"Disables Advanced Energy Efficient Ethernet
*EEE"0"Disables Energy Efficient Ethernet
EEELinkAdvertisement"0"Disables EEE link advertisement
SipsEnabled"0"Disables system idle power saver
ULPMode"0"Disables ultra low power mode
GigaLite"0"Disables GigaLite
EnableGreenEthernet"0"Disables Green Ethernet
PowerSavingMode"0"Disables power saving mode
S5WakeOnLan"0"Disables wake from S5 power state
*WakeOnMagicPacket"0"Disables wake on magic packet
*ModernStandbyWoLMagicPacket"0"Disables Modern Standby wake on magic packet
*WakeOnPattern"0"Disables wake on pattern match
WakeOnLink"0"Disables wake on link activity
Applied to all Device Parameters subkeys under each bus in HKLM:\SYSTEM\ControlSet001\Enum\{ACPI,HID,PCI,USB}:
Registry valueDataEffect
EnhancedPowerManagementEnabled0Disables enhanced power management
SelectiveSuspendEnabled0x00Disables selective suspend
SelectiveSuspendOn0Additional selective suspend disable
WaitWakeEnabled0Disables wake events from this device
WDF (Windows Driver Framework) subkeys also have IdleInWorkingState=0 set to prevent idle power transitions.
Applied to Device Parameters\Disk subkeys under HKLM:\SYSTEM\ControlSet001\Enum\{NVME,SCSI}:
"CacheIsPowerProtected"=dword:00000001
Setting CacheIsPowerProtected=1 tells Windows the drive’s write cache is protected against power loss, which disables the “Turn off Windows write-cache buffer flushing on the device” safety mechanism. This can improve write performance but risks data loss if power is cut unexpectedly.
Disabling write-cache buffer flushing on drives that are not genuinely power-loss protected (e.g. consumer NVMe drives without capacitor backup) risks data corruption or loss on unexpected power failure.

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Timer Resolution Service

The system timer normally runs at approximately 15.6 ms (64 Hz). WinSux installs a persistent Windows service that locks it to the minimum interval supported by the hardware — typically 0.5 ms (2000 Hz) on modern systems. Why this matters: A coarser timer means the scheduler wakes up less often, which introduces jitter into frame delivery, audio callbacks, and other latency-sensitive operations. Locking the timer to maximum resolution reduces this jitter.

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Compilation and installation

The service is compiled from source at install time using the .NET Framework 4.x C# compiler: 
# Compile
Start-Process -Wait "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" `
  -ArgumentList "-out:C:\Windows\SetTimerResolutionService.exe C:\Windows\Temp\settimerresolutionservice.cs"

# Install and configure
New-Service -Name "Set Timer Resolution Service" `
  -BinaryPathName "C:\Windows\SetTimerResolutionService.exe"
Set-Service -Name "Set Timer Resolution Service" -StartupType Auto
Set-Service -Name "Set Timer Resolution Service" -Status Running

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How the service works

On start, the service calls NtQueryTimerResolution to find the hardware minimum interval (MaximumResolution in the API, confusingly — the variable name refers to maximum resolution, i.e. the smallest interval), then calls NtSetTimerResolution to lock to that value: 
[DllImport("ntdll.dll", SetLastError=true)]
static extern int NtSetTimerResolution(uint DesiredResolution, bool SetResolution, out uint CurrentResolution);

[DllImport("ntdll.dll", SetLastError=true)]
static extern int NtQueryTimerResolution(out uint MinimumResolution, out uint MaximumResolution, out uint ActualResolution);

void SetMaximumResolution()
{
    uint actual = 0;
    NtSetTimerResolution(this.MaximumResolution, true, out actual);
}

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Global timer resolution requests

GlobalTimerResolutionRequests is enabled so that any process requesting a high-resolution timer is honoured system-wide rather than only within its own process context: 
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\kernel]
"GlobalTimerResolutionRequests"=dword:00000001

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MSI mode for GPUs

Message Signaled Interrupts (MSI) are enabled for all GPU devices. MSI replaces the legacy line-based interrupt delivery mechanism with in-band PCI messages, which eliminates shared IRQ contention and can reduce interrupt latency. WinSux enumerates all Display class devices via Get-PnpDevice -Class Display and writes the MSI key for each: 
$gpuDevices = Get-PnpDevice -Class Display
foreach ($gpu in $gpuDevices) {
    $instanceID = $gpu.InstanceId
    reg add "HKLM\SYSTEM\ControlSet001\Enum\$instanceID\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties" `
      /v "MSISupported" /t REG_DWORD /d "1" /f
}
A restart is required for MSI mode changes to take effect. WinSux performs a final restart at the end of steptwo.ps1.

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