True 120Hz from PC to TV

Make Your HDTV Accept Real 120Hz Refresh Rate

Purpose: Use TV as a 120Hz computer monitor. Smoother motion and less input lag.
Supported Displays: Several models including Vizio, Panasonic, etc. See comments.
Higher success rate for
Active 3D HDTV’s (the type that use electronic shutter glasses).
Alternatives: See List of 120Hz Monitors for computer monitors instead.

turbo-hdtv

Some HDTVs have an undocumented ability to accept 120Hz from a PC.
Many TV’s do 120Hz internally for a different purpose (e.g. motion interpolation, active 3D).  These TV’s support the dot clocks necessary for 120Hz because active shutter glasses 3D @ 60Hz (frame-sequential) use a similar dot clock frequency as 2D @ 120Hz.

It is important to note not all televisions can be forced to accept native 120Hz via external connections through refresh rate overclocking. A successful HDTV overclock to 120 Hz will result in 50% less motion blur compared to 60 Hz. Some models that do 120Hz internally (e.g. Motionflow, 3D) can also accept 120Hz externally.

Instructions: Output 120Hz From PC To TV

Choose a Compatible Graphics Card

The best cards for refresh rate overclocking are nVidia GeForce and AMD Radeon cards. Another advantage of nVidia Geforce cards is that they are also compatible with LightBoost monitors (including ASUS VG248QE) which use a strobe backlight for zero motion blur CRT-quality during high-end desktop video gaming. Consequently, nVidia Geforce products are currently preferred (at this time of writing) over AMD Radeon products.

NOTE: Unfortunately this will not benefit game consoles (PlayStation 3, Xbox 360) since consoles are limited to 60 Hz. However, several new Sony TV’s have a Game Mode that allows the interpolation-free Sony Motionflow Impulse mode with low input lag. This is a strobe backlight similiar to LightBoost.

Choose A Refresh Rate Overclocking Method

  1. If you have an NVIDIA GeForce card, you can use NVIDIA Control Panel, which has a “Create Custom Resolution” button accessed via “Change Resolution”.
  2. Use the overclocking feature found in some cards, including EVGA Geforce Titan.  It has a slider that allows you to raise the refresh rate.
    evga_overclock
  3. Or Install ToastyX Custom Resolution Utility.
    This is a method that works on both GeForce and Radeon.
    (For GeForce, NVIDIA’s Custom Resolution feature can also be used).
    toastyx
  4. Or Install PowerStrip.  It can also be used for refresh rate overclocking, but not all newer graphics cards work. If the “Advanced timings options…” button is greyed out, PowerStrip is not compatible with your graphics card.
  5. Or Manual EDID override. This is the hardest method. If you need to get familiar with how EDID overrides are installed (e.g. 3D Vision Blog Instructions (different purpose)Microsoft technical info).
    (a) Download one of the [email protected] files ([email protected] EDID Overrides in this thread). This allows your HDTV to masquerade as a 120 Hz computer monitor, allowing your graphic card to send 120 Hz into your HDTV. Then you can see if the display successfully displays it!
    (b) To install an EDID Override, download the file, then right-click this INF file in File Explorer and select “Install”. This is a one-time step, even for future HDTV’s. An example good EDID override is the ASUS VG278H EDID override INF file. This will attempt to make your HDTV “masquerade” as an ASUS 120Hz computer monitor.
    (c) Next, go to Device Manager and right-click your monitor, select “Update Driver Software”, then “Browser my computer…”, then “Let me pick…”, then disable “Show compatible hardware”, then select the “EDID Override” from manufacturer ASUS (even if you don’t have ASUS), and then reboot. Repeat this step every time you reconnect an HDTV to a new input, or to a new HDTV.
    (d) IMPORTANT! (Windows 8 specific): If you’re installing under Windows 8, follow these instructions to disable driver signature enforcement before installing this INF file. The INF file is installed via right-clicking the monitor in Control Panel -> Device Manager, and updating its driver.
    (e) Finally, Control Panel will now unlock the 120 Hz refresh rate.

Test The Refresh Rate

  1. Connect your computer to the television first.
    Make your HDTV your primary display. If using multiple displays simultaneously, do not use mirror mode. Otherwise, it won’t work properly.
  2. Unlock 120Hz If Necessary
    If using ToastyX Custom Resolution Utility, add the 120Hz mode.
    If using manual EDID override, install the override as described above.
  3. Test the 120Hz refresh rate
    Go to Control Panel -> Display -> Adjust Resolution -> Advanced Settings -> Monitor
    (a) If the resolution of 1920×1080 fails, try 1280×720 at 120Hz.
    There is a much higher success rate with 1280×720 at 120Hz
    (b) If 120 Hz fails at all resolutions, try other refresh rates such as 75 Hz.
    Testing 720p @ 120Hz is usually more successful because it uses a similar dot clock frequency to the frame-sequential 3D 720p @ 60 Hz (shutter glasses signal). You may need to use a Custom Resolution via the nVidia Control Panel or AMD Catalyst in order to create the 1280×720 120 Hz resolution, if it does not already exist.
  4. Test all connections.  HDMI,  DVI-D,  VGA
    Sometimes, a HDTV successfully overclocks to 120 Hz on one connection only.
    Use compatible cables (e.g. high speed HDMI cables that are 3D and 4K  ready).
    Try to avoid adaptors (e.g. DVI-D to HDMI adaptor will not permit [email protected]).
    Try bypassing your receiver. Older surround sound units may not pass 120Hz HDMI.
    Yes, 120Hz sometimes works on older HDMI 1.3 ports.IMPORTANT NOTE:
    – Your TV may say “60Hz” even when computer says “120Hz”. Ignore this behavior.
    – Avoid DVI adaptors with HDMI as those cannot do [email protected]!
  5. Test to check for true 120 frames per second.
    Subjective Method: Drag windows around; dragging should be more fluid than 60Hz.
    Objective Method:
    TestUFO: Frame Skipping Check (web based) or Refresh Rate Multitool (install app).
    If only 60 frames per second is shown (“frame skipping”), try 720p instead of 1080p.
  6. Will it damage my HDTV?
    Not likely. The risk is low but may not be zero. Presently, no HDTV’s are currently known to become damaged because these models already do 120 Hz internally for other purposes (3D shutter glasses, frame interpolation, etc). Most HDTV’s simply make it difficult to accept 120 Hz natively from an external signal source.
    Blur Busters disclaims all responsibility for any possible damage to your display.

Special Situation: (from user reports) Sometimes a display “almost” reaches 120Hz, but not quite.  For example, 115 Hz or 118 Hz.  To fix such a minor shortfall, reduce the timings (smaller numbers for Front Porch, Back Porch and Sync) to maintain same dotclock while raising refresh rate. Using “Reduced” instead of “Automatic” within ToastyX Custom Resolution Utility, can do this too. This may allow success at 120Hz. 

Uninstalling CRU: If you have problems with ToastyX Custom Resolution Utility, just run “reset-all.exe” to undo the changes made by the ToastyX Custom Resolution Utility.

No fake frames. No interpolation tricks. No Motionflow voodoo. True 120Hz!
If you have a success report in HDTV refresh rate overclocking, please post your TV model in the new Blur Busters Forums!

official-120hz-list      our-gsync-preview

140 Comments For “True 120Hz from PC to TV”

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Kaovhmf
Member
Kaovhmf

Hi! I have a Samsung UN32H5550 television wich is, supposely, [email protected] The problem is that even doing all that you have sugested I can only get the max of 75Hz. I’m using a high speed hdmi 1.4, a Nvidia GTX 980 with the pixel clock patch but my TV refuses to run at 120Hz. What can I do next?

The Good King Snugglewumps
Member
The Good King Snugglewumps

E601i-A3 running at 120Hz at 1920 x 1080 with Nvidia’s custom resolution settings. Make sure to use HDMI 1 directly from PC to TV as using any other HDMI input or running it through a receiver results in really noticeable display lag and lack of ability to overclock display at 1080p.

Thank you for the information! While it may not help too much on the already existent 31ms display lag, it certainly makes screen blurring much less noticeable and any quick movement to be silky smooth compared to running it at 60Hz.

Alkaline
Member
Alkaline

Hey, do you know if it’s possible for the Samsung UN32H6350 to do true 120hz?

I’ve confirmed that it does have a native 120hz screen, but I’ve also heard rumors that Samsung locks their TV’s at 60hz. I’m really hoping it will do 120hz but I can’t find much information…

hhitech
Member
hhitech

I have the Samsung UN50H6350 myself, connecting to GeF and am experiencing about the same results as you only the 77hz setting actually gives me a much more blurry image than 60hz @ 1920×1080

hhitech
Member
hhitech
Sorry for previous accidental post.. I have the Samsung UN50H6350 myself, connecting to a GeForce GTX 770 and it seems I am experiencing about the same results as you except the 77hz setting actually gives me a much more blurry image than 60hz @ 1920×1080.. I was under the impression this is a 1080P 120hz native display, 120hz for PC gaming refresh rate was a big selling point for me. Now I am hearing that Samsung prevents ANY HDMI input devices from actually producing 120hz.. What?!? There are ONLY HDMI ports on this TV, 4 of them, nothing else. One… Read more »
okrongly
Member
okrongly

Did you have any luck with Samsung HDTV?
I have ue48h6400 3d, and no way to overclock it . Is it a true with hdmi 60hz samsung lock? Any way to unlock it?
Best regards

kristoferallen
Member
kristoferallen

I am having this same issue. It does support 77hz though. That is the highest I’ve been able to display mine. I have the 40 inch model that also has 240hz clear motion. I’m not sure why it says it supports 120hz native refresh rate if it can’t obtain that. My only guess is that it doubles every frame. It does look a ton better at 77hz though. But I will be returning it and just going with a 144hz monitor.

psynumb
Member
psynumb

Hi,
I recently bought a 4K LG 49UB850T (equivalent to the UB8500 in the US) partly to use it as computer monitor, and I had a questions:
First: Isn’t a 4K TV supposed to be able to run 1080p at 120 Hz easily, as it is supposed to be able to run 4K at 60Hz with HDMI 2.0?
If not, can I use “ToastyX Custom Resolution Utility” to force a 1080p @120 Hz on my TV?

Gloogloos
Member
Gloogloos

Did you ever get this to work, I am considering buying a Samsung 4K capable of HDMI 2.0 and 3D and want to know if this will work.

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