Kernel and Driver Latency Scan
Traces how long each driver holds the CPU for 10 seconds while you play, and names the ones that stall it. Also handles Memory Integrity, the hypervisor and GPU MSI mode.
Microsoft guidance: DPC 100 µs, interrupt 25 µs
FPS and latency tuning for Windows 10 and 11
Only the tweaks that actually work.
Tachyon applies the Windows, driver and power settings that have real evidence behind them, reads each one back to confirm it took, and measures the result on your own PC. Popular tweaks that do nothing go to the Placebo Graveyard instead.
Download Tachyon
Setup for Windows 10 and 11 · 64‑bit · under 1 MB
Every change can be undone
Nothing runs in the background
Installs in seconds
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The dashboard. Measurements in the screenshots are sample data.
Measured in
DPC ≤ 100 µs
ISR ≤ 25 µs
1% low FPS
frame time ms
thread wake µs
memory latency ns
What it tunes
28 tweaks, each one with a source.
Every tweak cites a vendor document or an independent test, and only shows up when it applies to your hardware. Each card tells you how safe it is and what kind of gain to expect before you flip it.
Safe
Caution
Medium gain
Small gain
Consistency
- Latency. CPU boost and core parking, PCIe and storage power saving, NVIDIA Low Latency Mode and mouse acceleration.
- FPS Boost. Flip model for windowed games, NVIDIA refresh and V-Sync settings, and a frame cap that keeps G-SYNC and FreeSync in range.
- Anything with a trade-off shows you the exact change first, and every switch turns back off.
BIOS guide
Reads your firmware settings and sorts them into worth changing, leave on, and no FPS gain. It tells you where each setting lives on your board, then restarts straight into setup.
XMP / EXPO · Resizable BAR · ASUS, MSI, Gigabyte, ASRock
Game Booster
Moves the background apps you choose into Efficiency Mode and pauses update and indexing services while you play. When the game closes, everything goes back.
Never closes your apps · works with Steam and Epic
System Cleaner
Finds temporary files and old caches, shows you what it found and asks before deleting anything. It won't touch shader caches, saved passwords or your files.
Frees disk space · shader caches left alone
Startup
Lists the apps and the scheduled tasks that start when you sign in, including the ones Task Manager doesn't show, so you can switch off what you don't need.
Windows' own tasks are never listed
Hardware Check
Catches the problems that cost the most frames: memory running below its rated speed, a graphics card in a slow slot, an outdated driver or a 60 Hz monitor setting.
Fix these first · usually the biggest wins
Proof Lab
Measured on your PC, not promised.
Run the built-in test before and after a change. It measures frame rate, 1% lows, thread wake latency and memory latency, several times each. A result only counts when it's bigger than the normal run-to-run variation.
1% low FPS, CPU-limited scene+8.0%Improved
Average FPS, GPU-limited scene+0.0%Within noise
Thread wake latency, typical−7.4%Improved
Example results. Your numbers depend on your hardware and what was already set.
Placebo Graveyard
More than 40 popular tweaks, checked and rejected.
These show up in tweak packs and videos everywhere. Tachyon explains why each one is placebo, unproven or harmful, and if another tool left one set on your PC, Fix puts it back to the Windows default.
TcpAckFrequency and TCPNoDelayPlacebo
Fast-paced games use UDP or turn off Nagle themselves.
NetworkThrottlingIndex = FFFFFFFFPlacebo
It limits packet handling during media playback. It has no bearing on ping.
SystemResponsiveness = 0Placebo
Only affects threads registered with the multimedia scheduler, and most games don't register.
GlobalTimerResolutionRequestsUnproven
An undocumented key. Games that need a fine timer ask for one themselves.
Prefer Maximum PerformanceUnproven
Holds GPU clocks up, but NVIDIA's own latency guide doesn't list it. You pay in power and heat.
Spectre and Meltdown mitigations offNot worth it
The cost was real before 2018. On modern CPUs the gain is small and the risk is real.
Disabling services in bulkPlacebo
An idle service uses almost no CPU, and disabling dozens breaks features in ways that are hard to trace.
Realtime priority for gamesHarmful
It can starve the input, audio and driver threads the game depends on.
Disabling the page fileHarmful
Some games crash when memory runs short, and nothing gets faster.
RAM cleaners and standby purgersPlacebo
Windows already hands standby memory to games instantly. Purging it throws away useful cache.
Placebodoes nothing measurable
Unprovenno evidence either way
Not worth ittiny gain, real cost
Harmfulmakes things worse
Safety
Every change is backed up first and checked after.
Tachyon saves the old value before it changes anything, reads the setting back to confirm it took, and lists every change on its Safety page with an Undo button.
Undo anything
One change at a time, or Undo everything in one go. You can also create a system restore point from the app.
See it before it happens
Anything with a trade-off, or that restarts your network, shows you the exact change before it runs.
Nothing in the background
No service, no startup entry, no scheduled task. Close it and nothing keeps running.
Your data stays home
It only sends your license key and a one-way hash of your motherboard ID, to activate and check the key.
Get started
Running in under a minute.
Download Setup
One small file. Windows may ask you to confirm because the app changes system settings.
Install
Accept the license agreement and choose whether you want a desktop shortcut. After that, type Tachyon in Start search to open it.
Activate with your key
Paste your license key the first time it opens. It locks to your PC, and activating needs internet once.
1 week1 month6 months1 yearLifetime
Questions
Good to know
How much FPS will I gain?
It depends on your PC and on what's already set. A PC running in a power-saving mode, with memory below its rated speed or with a stalling driver can gain a lot. One that's already tuned may see little. That's why Proof Lab exists: it shows what actually changed on your machine, and calls anything inside normal variation no change.
Windows says it protected my PC. Is that normal?
Yes. Windows SmartScreen warns about new programs that don't have a code-signing certificate yet. Choose More info, then Run anyway. Some antivirus tools are also wary of any tool that changes system settings.
Can I undo everything?
Yes. Every change is listed on the Safety page with its own Undo button, and Undo everything reverses them all. Uninstalling from Settings › Apps removes the app but leaves your settings as they are, so undo first if you want them back.
What do I need?
Windows 10 or 11, 64-bit, and administrator rights. Nothing else to install: it uses the .NET Framework that comes with Windows. Activating your key needs an internet connection once.
How do license keys work?
Each key works on one PC. It locks to the first PC that activates it, and its time starts then. Keys come as 1 week, 1 month, 6 months, 1 year or lifetime. After activating, the app starts without internet.
Does it collect my data?
No. Its only connection is to the activation server, to activate your key and check that it's still valid. It sends the key and a one-way hash of your motherboard ID, and nothing else.