DOWNLOAD: Blur Busters Strobe Utility for Eve Spectrum Monitors

Public Service Announcement for Early Users & Reviewers

If you got one of the first units, please firmware update to firmware Version 100R852 or newer for much better strobe backlight tuning. (You can go to Eve support web page → click Downloads)

The Eve Spectrums are Tuned by Blur Busters beginning with this firmware version.

While these monitors have the slow(ish) red KSF phosphor, they are Tuned by Blur Busters (a new designation separate from Blur Busters Approved). Beginning with V100R852 or newer, we believe this is now among the best strobing (at the moment) you can get in any KSF-phosphor monitor on the market, featuring the following.

  • Easy High Quality Pre-Tuned Strobe (50, 60, 100, 120, 144 Hz) via monitor menu
  • Retro Friendly Strobe (50, 60 Hz) compatible with consoles, TV, and emulators!
  • Strobe any Hz, 50Hz to 144Hz in 0.001Hz increments. No preset limits!
  • Strobe any video source, not just GPUs
  • Optional Strobe Utility support (see below)
  • Optional Large Vertical Total support (requires ToastyX CRU) (strobe crosstalk reductions)
  • Optional Quick Frame Transport support (requires ToastyX CRU) (low lag strobing)

Make sure you break-in your monitor by warming up for 30-60 minutes before doing TestUFO tests on the strobe-backlight feature of this monitor. (Warm panels have faster LCD GtG)

Optional Eve Strobe Utility Download for Advanced Beta Testers

This is not a mandatory download – but this is useful for several use cases. Just like color tuning by colorimeter are mainly used by advanced users, strobe tuning is optional for advanced users.

This is what the optional advanced-user strobe calibration utility looks like, for users who would like to do DIY strobe tuning. (This is the Eve skinned version of the free strobe utility Blur Busters offers to multiple vendors)

Strobe tuning is the following in a nutshell:

  1. Make sure your Eve Spectrum is running firmware V100R852 or newer for much better “Tuned by Blur Busters” settings. Get the latest firmware download by clicking “Downloads” on Eve support web page.

Firmware upgrade instructions:

  1. Download and run Eve Strobe Utility Installer
    This is an official Blur Busters URL with code signature by Blur Busters / Rejhon Technologies Inc.

  2. Warm up the panel for at least 30-60 minutes; since panels are temperature sensitive and will produce lowest strobe crosstalk when warmed up.

  3. Enable Backlight Strobing via monitor menus on Eve Spectrum

  4. Switch to the mode you want to custom-tune (resolution, Hz, custom large vertical total, via NVIDIA Control Panel or ToastyX CRU)

  5. Launch Eve Strobe Utility

  6. It runs a built-in TestUFO crosstalk pattern (a scrolling swarm of UFOs)

  7. First, adjust Strobe Pulse Width to a preferred brightness-vs-clarity tradeoff; adjust to preference. Subsequent steps depend on this setting.

  8. Next, adjust Overdrive Gain until the crosstalk is minimized as much as possible.
    The goal of this step is to reduce the number of visible vertical lines

  1. Finally, adjust Strobe Pulse Phase until the screen middle is clearest.
    The goal of this step is to move the strobe crosstalk to a less visible area, such as off the top/bottom edges of the screen

  1. Repeat steps 8,9,10 one more time for a fine-tuning pass to double check.

IMPORTANT: Strobe Utility is for advanced users only; it is best to use the easy pre-adjusted strobe included in Eve Spectrum. The default settings will be good enough for majority of users.

Strobe Utility can help you with the following:

  • Reduce strobe crosstalk for specific areas of screen during motion blur reduction via backlight strobing (strobe crosstalk = the double-image effect)
  • Temperature compensation (reduce strobe crosstalk in cold rooms or hot rooms)
  • Panel variance compensation (compensate for minor panel lottery effects in strobe tuning, or panel aging effects)
  • Additional levels of strobe brightness/dimness settings
  • With sufficient learning/training, ability to achieve better than factory tuning, especially when combined with Large Vertical Totals via a Custom Resolution Utility (NVIDIA Control Panel or ToastyX CRU)

Before re-tuning your strobe calibration, it is best to power your monitor 24/7 for a few days to break-in your monitor when first receiving the monitor, since LCD GtG pixel response takes time to stabilize (e.g. temperatures during shipping, pressure spots during shipping, etc).

Also, when enabling motion blur reduction, don’t confuse strobe crosstalk with framerate-derived double image effects (e.g. like CRT 30fps at 60Hz) – strobe crosstalk is caused by LCD GtG leaking between strobed refresh cycles.

Also, there will always be some red phosphor ghosting due to the KSF red phosphor in the backlight of Eve Spectrum monitors. This is normal for all current NanoIPS panels, and not as noticeable in games as in the extreme crosstalk test animation. As a rule of thumb, KSF phosphor ghosting on a well-tuned panel is more visible than CRT ghosting but less visible than plasma TV ghosting.

The factory strobe tuning is good enough that there will usually only be a 1 to 5% reduction in strobe crosstalk after breaking-in and re-tuning with Strobe Utility. Larger improvements are possible with Large Vertical Totals via a Custom Resolution Utility (see Tips)

Thus, unless you’re an experienced/advanced user, you may not need Strobe Utility – you just simply adjust the “Backlight Strobing” setting in the on-screen menu for most needs.

You can minimize Strobe Utility anytime; it will reside in the System Tray until you right click to exit it.

Errata Note: A sleep or power-off will cause the custom strobe tuning to be reset; write down your three numbers. This will be fixed in a future firmware update. Supplementing this, a future version of Strobe Utility later this year, is intended to have strobe profiles that can be saved, and automatically recalled for a specific refresh rate, specific resolution, and specific vertical total

Optional Advanced User Posts Written by Blur Busters

Easy Everyday User Tips For Backlight Strobing

If you’re only interested in easy strobing, you don’t really have to worry about any of the above EXCEPT making sure your monitor is running firmware version V100R852 or newer.

  • Strobing is much better quality on latest firmware (V100R852 and newer)

  • Strobing is much better quality at framerates matching Hz. Make sure GPU keeps up.
    This is true for all impulsed displays, whether be CRT, plasma, or strobe-backlight, as another method of avoiding double images

  • Strobing is much better with refresh rate headroom below max Hz.
    This is true for all panels, not just Spectrum. Try 100Hz or 120Hz (also easier on GPU). More LCD GtG time between refresh cycles. Some vendors (e.g. ULMB) caps strobing Hz to avoid crosstalk, but Eve backlight strobing is 100% uncapped and lets users choose! So you can just optionally lower Hz if you’re more picky about crosstalk double-images than the average user.

  • Make sure to warm up the monitor if it’s been turned off for a while.
    The monitor is factory strobe-tuned by Blur Busters on an already warmed-up Eve Spectrum running in a room-temperature room, for fastest LCD GtG pixel response. Warm panels reduces strobe crosstalk (least double image effect).


Oops! That page doesn’t exist or is private.

Although I am still waiting for mine, the link for download the firmware seems doesn’t appear.


Fixed and thanks!

It was a one-character typo in the URL – sorry about that!


Hopefully this is on-topic but I’m out of the loop for this one, are you guys confirmed to be doing VRR strobing for this monitor? And if so, how long do you anticipate that process to take? I haven’t even got my Spectrum yet so your timeline isn’t impacting me at all, I’m just curious.

It is not confirmed either way, but they are currently working to see if they can make it happen

I appreciate the response but I’d rather hear directly from @BlurBusters since so much disinfo floats around these forums

Update About VRR Strobing: Beginning Work On It

EVE and Blur Busters are now starting talks about adding variable refresh rate motion blur reduction (aka “VRR strobing”) to firmware.

Please note that Blur Busters, as a third party vendor, is currently vetting the backlight hardware for any theoretical hardware limitations preventing reasonable quality variable refresh rate (VRR) strobing. The good news is that the backlight controller seem to be flexible and should meet the needs for VRR strobing.

That’s the last thing they said.


Excellent topic, thank you, Blur Busters!

Update About VRR Strobing: Beginning Work On It

Moved to this thread:


Any feedback from readers here for using Blur Busters Strobe Utility? Especially people experienced with previous versions of Strobe Utility for various other older monitors (e.g. XL2720Z)?

Thank you!

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Since this will be my first “true” gaming monitor I am a bit of a noob on this topic, but can you explain which are the advantages of VRR strobing (on top of normal strobe tuning)?
Like what will improve using next gen consoles?
Thank you for your awesome work on this monitor also!

Questions about the BB app, but overall I’ve found it easy to use following your instructions.

Is it intentional to be able to make custom adjustments to each of the built in profiles (short, medium, long, user)? You currently can.

  • If yes, is there a way to revert to default settings so we can easily return to the known good ones?

  • If yes, is there a way to select which profile we are tweaking from the app itself? Or are we required to first select it from the Monitor’s menu?

After tweaking the User strobing profile’s PW in the BB app, the monitor’s OSD menu displays a different “User defined pulse width” value than what I have set in the app.

  • If I go into the OSD menu and change the value the monitor instantly jumps to what the OSD was displaying (overrides the tweaked value provided by the app).
  • If I never touch that OSD menu value, then the tweaked value remains enabled - it just displays the wrong number vs what I’m actually seeing (correct outcome just mismatched numerical displays).
  • Perhaps a limitation of the software/DDC controls and simply is what it is?

It seems important to note the BB app must be closed between profile changes. If you change the monitor’s strobing profile after the app is open (it defaults to the taskbar when closed rather than fully exit) you will be shown the values you previously had tweaked or as read when first opened. But those won’t actually match the newly selected profile.

Example of what happens:

  1. Monitor OSD strobing set to short (default 5pw).
  2. Open BB app, displays 5pw (and other values).
  3. Change monitor OSD to medium (15pw).
  4. BB app still open - displays 5pw (but monitor is clearly the correct brightness of 15.
  5. Close BB app completely (not taskbar minimized), reopen BB - displays 15pw.
  • The moment you change a slider it will commit the value as shown but this can lead to unintentional adjustments rather than tweaking from the profile’s starting point. As long as you open the app after selecting the profile, everything is great.
  • Would it be possible to provide a refresh button so the app can ensure it is showing us the actual current values in the monitor? Then we would always know the values on the sliders are the current ones about to be changed.

There is also a scenario where a user enabling strobing will result in a constant screen flashing (brightness going high/low). This has nothing to do with the tuning app (the app just makes it obvious something is wrong) and simply a result of the Nvidia control panel applying Gsync while the monitor is in strobing mode. Mentioning it only because I originally thought strobing was broken on my unit only to realize I had to disable Gsync (per 3d application profile is the ideal approach). This is the exact same thing required on my older Asus Gsync model when using ULMB strobing mode.

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Glad you like Strobe Utility a lot!

The answer is no. It is just a user interface quirk due to Strobe Utility’s current inability to turn on/off backlight strobing (yet). That’s why it’s so confusing to a first-timer (for now)

Currently, this just simply copies the existing strobe setting to the User Defined memory. But due minor UX bugs, it “looks” like you’re customizing Short/Medium/Long.

A future firmware will probably disallow editing Short/Medium/Long by automatically switching to Custom everytime you try to adjust Short/Medium/Long.

Officially I can only support tweaking the “Custom” setting.

No, it’s currently a minor OSD bug. The correct value is not real-time updated in the OSD. It should be syncing in both directions (OSD vs Utility).

OSD-vs-Utility numeric sync is currently not in real time.

Undocumented trick: Hit F5 to refresh the values in Strobe Utility. Or simply re-select the XG2431 in the monitor selector.

Perhaps I’ll add a refresh icon to the checkmark button, so that the checkmark button doubles as a refresh button too (refresh monitor list + refresh current custom strobe settings).

Then you can avoid quitting/restarting Utility. But for now, use F5 keypress.

Probably you accidentally activated an undocumented VRR strobe mode that’s not flicker-compensated (yet). Good VRR strobing requires good flicker-compensation algorithms.

I would not recommend using this bad-quality mode until the Blur Busters tuned strobed VRR mode is released in a future firmware update.

Thank you for the compliment about Strobe Utility!


This is the Strobe Utility thread, so I’ve replied about strobed VRR at:

Make sure to first get familiar with VRR pros/cons individually and strobing pros/cons individually, before combining the two (VRR+strobing).

Thanks for the compliment about my strobe-related work!


Would be interested to hear more comments about the KSF phosphor behavior interacting strobe features of this monitor;

A HardForum member posted this snippet about the strobing – that they cannot see any KSF phosphor artifacts. Which is a great sign!

I’d love to hear more comments about the motion blur reduction (backlight strobing) of this monitor.



It seems I have encountered a possible bug. The scrolling UFOs begin scrolling in a slower speed, then the speed ramps up to the point of me being sick if I try to calibrate the strobing. LOL

The test worked as expected using the browser verison

That is normal behavior as it synchronizes to the refresh rate – But you are right; I need to put a better animation algorithm there. Thanks for the report.


Is there a dedicated webpage yet for the utility, or is the direct link to the .exe still the newest release?

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The direct link is sill the the same as the newest release.

I’ll be making dedicated pages for the multiple brands of strobe utilities – but I would like to hear more feedback from Strobe Utility users first.

Anybody who would like to provide feedback – I’d love to hear back by here, by email, by private message, or on Blur Busters Forums.


Does backlight strobing work with HDR? Or do I need to turn that off to try this?

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