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    Z70va Refresh Rate?

    Discussion in 'Asus' started by hokeypokey, Mar 25, 2006.

  1. hokeypokey

    hokeypokey Notebook Enthusiast

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    I'll be getting this laptop soon (it's being shipped! hurray), but i'm curious as to what the refresh rate of the screen is.

    I assume it is 60hz? If it is, is 60hz good? I don't really know what that number is supposed to mean to me. Are there any ghosting issues with the Z70va?
     
  2. flanken

    flanken Notebook Evangelist NBR Reviewer

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    See my post here. LCDs don't really have refresh rates. As far as I've heard, most z70va users haven't complained about ghosting; if it was a problem, I'm sure you'd never hear the end of it.
     
  3. Ice-Tea

    Ice-Tea MXM Guru NBR Reviewer

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    Copy paste rules!

    Hi,

    The lightoutput with CRT's comes from the pixels being 'hit' by the electron beam. Beacause the beam starts in the upper left corner and ends in the bottom right. Because of this, by the time the beam comes top the bottom right, the upper left and most of the upper part has already started to faint. The eye integrates the brightness and sees 'flicker'. Even if your brain looks over it, it's still a strain on your eyes.

    However, the lightoutput with LCD comes from the backlight, either edge or back lit. Because this is a constant light source (or at least: the CCFL lights flicker at much higher frequencies) this is of no concern to the eyes. So the refresh rate is no longer attached to the flickering of the screen, but only to the amount of times the information on the screen is updated. And 60Hz is more than enough for that.

    Hope this helps,

    Ice-Tea
     
  4. hokeypokey

    hokeypokey Notebook Enthusiast

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    Thanks guys! It seems a little counter-intuitive for Windows to display a 60hz refresh rate.
     
  5. SRD

    SRD Notebook Virtuoso

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    Refresh rates are irrelevant to LCDs. what you are thinking of is responce time thats what cause ghosting if its to high.
     
  6. Darkforce5782

    Darkforce5782 Notebook Consultant

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    Agreed. I am not sure what the response time is on that notebook. The refresh rate on my Z81 can only be set to 61Hz which is at the refresh rate at default though
     
  7. hokeypokey

    hokeypokey Notebook Enthusiast

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    Do you know what the response time of the Z70va is?
     
  8. SRD

    SRD Notebook Virtuoso

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    They dont list responce times on notebook LCDS. they are never as good as desktops. I have used the z70va for gaming and have never noticed any ghosting.
     
  9. pbcustom98

    pbcustom98 Goldmember

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    in CCC, it shows it as 60hz, but i have never had any problems with ghosting in games.. i love the display on the Z70VA..never had any trouble with it.

    pb,out.
     
  10. lazybum131

    lazybum131 Notebook Evangelist

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    My Z70Va uses the Samsung LTN154P1 LCD panel. It has a 25ms response time, which is horribly slow compared to desktops but I haven't seen any ghosting.

    And the refresh rate does still matter with LCDs, but should only make a difference with LCDs with 16ms and under response times. The windows 'refresh rate' setting still controls how many times new info is sent to the monitor. A 16ms should be able to show about 62.5 new frames per second and with monitors with faster response times capable of showing even more, the default windows refresh rate setting will effectively limit the number of frames shown to 60 per second even though the LCDs can switch more often.
     
  11. SRD

    SRD Notebook Virtuoso

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    60hz is the refresh rate. what you are talking about is responce time.
     
  12. SRD

    SRD Notebook Virtuoso

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    it is funny though. ive used panels with 25ms responce and never noticed ghosting then used panels that say like 12ms and the ghosting is horrible. i think there has to be more to ghosting than just the lcd itsself maybe. or people just bull**** the specs.
     
  13. pbcustom98

    pbcustom98 Goldmember

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    oops..you are correct.

    regardless, the z70va has a beautiful screen, perfect for me in everyway.

    pb,out.