Samsung HOWTO

Eliminate LCD Motion Blur on Samsung 120 Hz Monitors

Supported Monitors: Most samsung 700D, 750D and 950D series.
Tested: S23A700D, S23A750DS23A950D, S27A700D, S27A750D, S27A950D
For LightBoost instructions on ASUS and BENQ 120 Hz, click here instead.

Samsung SA700D, SA750D, and SA950D has a little-known strobe backlight similar to LightBoost that eliminate LCD motion blur. Samsung does not advertise this as an official LightBoost feature. A synchronized stroboscopic backlight works by keeping pixel persistence in total darkness (unseen by eye) between refreshes, and strobing the backlight only on fully-refreshed LCD frames (high speed video). As a result, the refresh-synchronized strobe backlight eliminate LCD motion blur. This brings CRT motion clarity to LCD displays.

Enable Strobe Mode on SA700D, SA750D and SA950D

  1. Set your PC into 120 Hz mode.
    (Control Panel -> Display -> Adjust Resolution -> Advanced -> Monitor)
  2. Before the next step, change “Response Time” to “Normal” via the monitor OSD.
  3. Now, turn on “3D” via the monitor OSD, frame-sequential mode.
  4. Keep using the monitor even for 2D gaming.  (No 3D glasses needed)
  5. For better color, change “Magic Angle” to “Group View”
  6. Run motion test at in Chrome or another 120Hz web browser.

Note: On some computer configurations, your monitor might turn off when entering and exiting video games.  If this happens, simply turn on your monitor again.

Important: The zero motion blur effect occurs at fps matching Hz, so you ideally need 120 fps at 120 Hz for the best CRT clear motion effect.

The good news is that the Samsung strobe backlight works with both AMD Radeon and nVidia Geforce cards! (Credit: review).

PixPerAn tests and TestUFO tests show 75% less LCD motion blur than regular Samsung 120 Hz even for 2D usage, which is a huge reduction. PixPerAn readability test of at least 25. This is an additional reduction on top of the 50% motion blur elimination caused by going from 60 Hz to 120 Hz. As a result, you get almost a whopping 90% less LCD motion blur than regular 60Hz! This is because the Samsung 3D mode enables a strobe backlight, which also eliminates motion blur during 2D usage.

The bad news is that the input lag is worse than official LightBoost monitors, so this is not as useful for competition online gaming as official LightBoost monitors. However, the lack of motion blur is quite handy for solo gaming, and the Samsung is known to have better colors than most TN-panel monitors!

The Science Behind Strobe Backlights

The Samsung strobe backlight is almost identical to LightBoost. This high speed video (480fps + 1000fps) demonstrates a LightBoost strobe backlight successfully bypassing pixel persistence as the motion blur barrier:

TFTCentral posted a good article about Motion Blur Reduction Backlights, explaining how strobe backlights can eliminate motion blur. Other information can be found here on this website, including Scanning Backlight FAQ, as well as Science & References.

For information about LightBoost monitors or other motion-blur-eliminating monitors, see the Official 120Hz Monitor List, or the LightBoost HOWTO.

30 Comments For “Samsung HOWTO”

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both times it said checksum error.
I for sure have an issue with one of the monitors. 2 of them lets me connect via DVI and the computer knows they are samsung s23a700 monitors but the one monitor I have just goes black when i connect via dvi. When I connect that monitor with dvi to a active dual link display port adapter then display port to my video card. Then it will display 640×480 but it doesnt know what kind of monitor it is. With the CRU1.1 utility I exported the stuff from the samsung monitor and then imported it to the Generic pnp monitor and then changed product id. I now had my computer recognizing all the monitors as samsungs and it let me set them all to 120hz.


I recently got 3 samsung sa700d monitors. I followed the samsung light boost how to instructions from the blurbusters. I can turn the frame sequential mode on and it works great, totally reduces the motion blur. My problem is if I turn off the monitors or my computer, then the monitors turn off that mode. I tried researching it more but everything I read is people using that CRU program to import inf. so that they can get 3d vision working. I dont know if that will help me because the option to turn it on and off is in the monitor osd. I ran the toastyx program hoping I could just force strobbed refresh rates all the time but it didnt make a difference. Do you have any ideas on how to get it to stay in frame sequential mode?


I have the Samsung S23A750D but when I follow the steps and turn it on, the screen goes all weird and has lots of vertical lines. Any ideas?


Is there any chance to use Strobe mode without using 3d mode?

NCX:s review of the monitor says: “2D-3D Conversion introduces a lot of input lag which affects aiming, movement and general reactivity during games. When using a controller it is still playable, but I found the delay to be unbearable when gaming with a keyboard and mouse.”


Is the added input lag from the Samsung with Lightboost that bad?! I mostly play fast FPS games and if it’s clearly noticeable it would be a major disadvantage as the main point of going with a 120Hz monitor is to have as less input lag possible, unless you guys tell me that the refresh rate have nothing to do with the input lag, neither does the “GtG value”, that it’s just a spec that the manufacturer never tell and that you cannot improve no matter what you do on the monitor.