True 120Hz from PC to TV!!! (Successful Overclocking Of HDTV / Plasmas)

Discussion in 'Displays' started by Mark Rejhon, Jun 11, 2013.

  1. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    The bleeding edge art of overclocking an HDTV to 120Hz...

    True 120Hz from PC to TV:
    Make Your HDTV Accept Real 120Hz Refresh Rate


    [​IMG]

    Just like overclocking a Catleap 2B, or the QNIX Q2710 Evolution 2, or the X270OC
    ...it is also possible to overclock some HDTV's to 120Hz from a computer too!
    ...Dozens of success reports are coming in, including:


    HDTV Overclocking Instructions: Get 120Hz from a PC to a television

    No fake frames. No interpolation junk. No Motionflow voodoo. True 120Hz!.
    Try this with your existing HDTV.
    Post your success reports here.

    (HardForum courtesy: Buy your TV via HardForum Amazon Link)

    ________________

    EDIT: A second avenue of reducing motion blur on HDTV's is to get a Sony TV with the low-lag Game Mode Motionflow Impulse feature (LightBoost style strobe backlight). It is only 60Hz but reduces motion blur by 75% and is console-compatible.
     
    Last edited: Aug 16, 2013
  2. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    The great news is that the 42" Vizio M420SL costs only $650 -- not bad for a 42" 120Hz computer monitor.
     
  3. Ultima99

    Ultima99 [H]ardness Supreme

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    You're a true refresh rate crusader dude...

    Keep on fighting the good fight.
     
  4. Black Octagon

    Black Octagon Limp Gawd

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    Thanks Mark, but I remember when that 120Hz.net thread about the Vizio e3d420vx first started. That particular HDTV natively accepts a 120Hz signal. So while it was a little bit more involved than connecting a PC to the HDTV (the guy had to set a custom resolution in NVIDIA Control Panel) there was no actual overclocking in this case...unless I've been mis-understanding what overclocking a display actually means?

    That said, I hadn't heard of the other 3.

    By the way, this link you posted:
    http://www.blurbusters.com/zero-motion-blur/120hz-pc-to-tv/

    Is it meant to replace this (now broken) link from April:
    http://www.blurbusters.com/zero-motion-blur/hdtv-refresh-overclock
    ?
     
  5. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Yes, that's the genesis that lead to the creation of that HOWTO.
    With the increasing popularity of overclocking computer monitors... awareness of the ability to overclock HDTV's need to be raised as well, too.

    -- Some of them supports them (Part of EDID data; intentionally but unofficially);
    -- Some of them actually support them but EDID doesn't say it (ignoring the EDID "lie");
    -- Some of them is true overclocking (forcing the refresh rate, manufacturer never intended 120Hz to be native).

    Regardless, the HOWTO applies to all situations.
    Awareness is quite low; just google "120Hz from PC to TV"; everyone still keeps saying it is impossible. That's outdated information now.
    Blur Busters is trying to fix that. :)

    (P.S. Both links works now; it is fixed.)
     
    Last edited: Jun 11, 2013
  6. Black Octagon

    Black Octagon Limp Gawd

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    Excellent stuff, thanks again!
     
  7. sadbuttrue

    sadbuttrue Gawd

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    The Panasonic 50ST30 (cpl years old) will accept 1280x720 @ 120hz. The OSD reports 60hz and 3D mode detected. Colours are slightly different but there is no 3D being applied. I have verified that it does show 120 unique frames.

    So, when you try outputting 120hz to your TV don't assume the OSD is giving an accurate report. It may say 60hz yet actually be showing 120hz.
     
    Last edited: Jun 11, 2013
  8. Trombe

    Trombe Gawd

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    A month after I get a qnix lol...and I prefer screen size over total pixels too, not to mention this would be easier to drive on my meager 7870. Granted my TV is an offbrand 60Hz native without any 120Hz internals so it probably wouldn't work anyway.
     
  9. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Excellent, I've added the Panasonic 50ST30 plasma to the list of success reports at the bottom of the page.

    BTW, from my experience and what I hear from others, it seems the almost all 3D-capable Panasonic "50" series plasmas have some capability of doing 120Hz natively, either at 720p and sometimes 1080p.
     
    Last edited: Jun 11, 2013
  10. OP20

    OP20 Limp Gawd

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    Do any of these TVs have displayport or dual link dvi?
    I didn't think you could push 1080p @ 120hz through hdmi?
     
  11. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Depends on the setup. HDMI 1.4 has the bandwidth to support 120Hz@1080p, unofficially.
    If your Radeon or Geforce card has a HDMI output, it's possible to force 120Hz out of it with various tweaks such as EDID overrides.
    Officially you need HDMI 1.4b at the minimum for 1080p@120Hz (2013 chipsets), but it has miraculously worked sometimes.
    This is really overclocking territory.

    The problem occurs if you try to convert DVI-D to HDMI (which doesn't work at 1080p@120Hz).

    Improve your successes by:
    -- Using a very good HDMI cable even if the HDTV is only HDMI 1.3a
    -- Try all ports on TV
    -- Try all ports on computer
    -- Do not use any adaptors (Do not use DVI-D to HDMI adaptor)
    -- Bypass your surround sound receiver. (Some will work, others won't pass through 120Hz HDMI)
     
    Last edited: Jun 11, 2013
  12. Trojita

    Trojita n00b

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    Awesome. I'll try testing this out with my HX929
     
  13. LigTasm

    LigTasm [H]ardness Supreme

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    Somehow I knew before even clicking that this was a Mark Rejhon thread :D

    Nice to know there are some TV's out there that can do it since those nice Mitsubishi's.
     
  14. OP20

    OP20 Limp Gawd

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    Interesting to know. I'll give this a shot when I get home on my UN55ES7100!
     
  15. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Please report back, and also mention which cable/port you used!

    BTW, don't forget to bypass your surround sound receiver, if it doesn't work.
    Some newer units (especially 4K capable units) work with 120Hz HDMI. But not all do.
    And use a very good HDMI cable, one rated 3D or 4K compatible. Monoprice sells those for cheap.
     
    Last edited: Jun 11, 2013
  16. DouglasteR

    DouglasteR Limp Gawd

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    What make you believe that the TV is actually showing 60fps but the menu (who have been overrided by the edid hack) is saying 120hz ?
     
  17. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    sadbuttrue saying vice versa. It is a successful overclock.
    The television is actually displaying 120 frames per second, but the TV menu is saying 60Hz.

    Symptoms of successful 120Hz:
    1. You have 50% less motion blur during full fluidity animations (fps=Hz). Game motion is smoother.
    2. Dragging windows around feels much smoother (with a gaming mouse). 120Hz computer monitor veterans (e.g. ASUS VG728H, ASUS VG248QE) are familiar with this.
    3. Software such as Refresh Rate Multitool confirms true 120 frame per second. (no faked or skipped frames)
    4. You feel less input lag.

    At this point, that's a successful 120Hz native refresh rate. No interpolation!
     
    Last edited: Jun 11, 2013
  18. l88bastard

    l88bastard 2[H]4U

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  19. wabbitseason

    wabbitseason [H]ard|Gawd

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    Holy shit 120Hz plasma!!? If/when this gets working on panasonic GT/ST series at 1080p, the display wars will be over.
     
  20. OP20

    OP20 Limp Gawd

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    I got the samsung s27a950d EDID to work and then tried 2 different ways to push 120hz, 96hz at different resolutions... no luck :(

    UN55ES7100
     
  21. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Thanks for the reports of non-successes; they are as useful as the reports of successes!
    You both tried direct HDMI connection, directly from graphics card to TV -- no adaptors, no receivers, no HDMI switches?
     
  22. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    What cable did you use, and did you directly connect from computer's HDMI port to the television's HDMI port?
     
  23. sadbuttrue

    sadbuttrue Gawd

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    GTX670 HDMI -> 5m HDMI -> Manual switch box -> 5m HDMI -> TV HDMI
     
  24. maarten12100

    maarten12100 Limp Gawd

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  25. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Excellent!
    I'm adding that to the Comments section of the HDTV Overclocking HOWTO.

    That said....250Hz+ in 720p? Wow.
    And you only paid $600 for this 39 inch display? (I knew these 39" 4K panels were available at factory quantities for only $425 -- but I'm surprised the markup on top of that is that small)
    You should purchase a Casio high speed camera ($250 from eBay) -- either the EX-FC200S or EX-ZR200. They have 120fps, 240fps, 480fps, and 1000fps video capture modes, which I find quite useful in tests, and I used one to create the high speed video of LightBoost; so it should be useful for high-refresh-rate verifications (making sure 254Hz is not framedropping)
     
    Last edited: Jun 16, 2013
  26. Tych-0

    Tych-0 Gawd

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    Wow, this is exciting stuff. I don't think I'll try it on my tv, but it has never even crossed my mind to try to over clock my U2711. I suppose whilr I wait for the release of a stroboscopic 1440p monitor it's worth a shot.
     
  27. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Updated list with additional models.
     
    Last edited: Jun 13, 2013
  28. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Updated list again, with modification:
     
  29. yap09

    yap09 n00b

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    anyone test this on a LC70C6500U ?
     
  30. Black Octagon

    Black Octagon Limp Gawd

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    ^Why would you do that when the S27A950D is a monitor with native 120Hz support and this thread is about HDTVs?
     
  31. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    He just simply made a HDTV (UN55ES7100) "pretend" it was a S27A950D, by using an EDID override. It's an advanced method of making an HDTV pretend it's a 120Hz computer monitor.

    The ToastyX method is far easier. But some people are just very familiar with using EDID overrides.
     
  32. mutantmagnet

    mutantmagnet Limp Gawd

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    Thank you for being so diligent Mark.
     
  33. Nenu

    Nenu [H]ardened

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    Great thread, subscribed!
     
  34. splango

    splango n00b

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    Great post!

    Looking forward to more results :)


    I know if I'm in the market for a new TV and its not confirmed 120hz, I will ask if I can connected a laptop up to do some "tests" before buying ;)
     
  35. Yaka

    Yaka Gawd

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    how likly are we to kill a plamasma screen? ive got a old panasonic 42 PHD8 screen that i am thinking of trying but dont wana kill it as i want it to last until a decent 4k screen comes out
     
  36. Cecil

    Cecil [H]ardness Supreme

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    Im trying to do this on my Samsung PN60F5500. I have a high speed HDMI cable from 660 TI going to input 3/DVI on the tv. Renamed the input to DVI-PC.

    Then used ToastyX CRU and added a custom 120Hz mode, reset the PC, and it doesnt show up using Nvidia or Windows control panels.
     
    Last edited: Aug 1, 2013
  37. Cecil

    Cecil [H]ardness Supreme

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    Just making a custom res in Nvidia Control Panel, it goes up to 75Hz, but stops after that. Set it to 72Hz, and used the UFO test to make sure it wasnt dropping any.

    Anything else to try?
     
  38. Mark Rejhon

    Mark Rejhon [H]ard|Gawd

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    Glad to know that the TestUFO Frame Skipping test helped!
    Including the link here for other readers: www.testufo.com/#test=frameskipping

    Make sure to run that link on a TestUFO supported browser, such as Chrome or Opera15+ (120Hz capable and beyond) or using IE10 (works up to 105Hz). If using Chrome browser, make sure everything in chrome://gpu is enabled. Temporarily run in single-monitor mode, for more reliable frame rate.

    Do you get a higher refresh rate during 720p?
    Sometimes 120Hz only works with 720p.
     
  39. Digital Viper-X-

    Digital Viper-X- [H]ardForum Junkie

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    Someone needs to do this with a BenQ W1070 projector :D
     
  40. Cecil

    Cecil [H]ardness Supreme

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    Tried 720P and it wouldn't work over 75Hz either.

    Going through my Onkyo receiver not even 72Hz would work. So I guess Im just sticking to 60Hz.