LCDs, 4X AA and 16X anisotropic filtering
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  1. #1
    Join Date
    Oct 2000
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    London, UK
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    LCDs, 4X AA and 16X anisotropic filtering

    G'day to y'all!

    I am thinking of buying one of those new spangly new Radeon 9700s, doing a mobo / cpu upgrade etc. It would be run on a 15inch LCD - 1078x768 max res.

    Question1:

    Would turning on 4X AA and 16X anisotropic filtering have the same effect on an LCD as it would on a CRT? Isn't it the case that LCD pixels can only be on or off? I don't want to spend 400 on a graphics card if I can't see the benefits on my monitor!

    Question 2:

    1078 x 768 with 4X AA and 16X anisotropic filtering
    or
    1600x1200 without 4X AA and 16X anisotropic filtering
    Which is better?

    Thanks

  2. #2
    Join Date
    Apr 2000
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    UK
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    8,466
    Yo.

    Q1 - Yes, it will have exactly the same effect. In fact, the visual impact may be more pronounced due to LCDs having considerably "squarer" and better defined picture elements than CRTs. No - LCD pixels don't just have discrete 0/1 states. Usually, each pixel has 255 levels of "un-twist" and one fully-polarising position. So in RGB system they can produce 256x256x256=16.7million discrete tones; high colour.

    Q2 - Well... you'll have to buy the card and see. Remember that LCDs have a fixed resolution. When running 1600x1200, your monitor will automatically scale the image down to 1024x768 so in effect super-sample anti-alias the image. The problem with that is that it will AA everything, i.e. textures as well as lines. I think 1024x768 x 4xFSAA x 16xAF would be the better option; that will co-incide with the monitor's native resolution and preserve texture quality. In fact, if you have a reasonably powerful machine you could probably run every single game available with 6xFSAA at XGA quite easily.

    I think I would buy a 9700 if I could afford it. I'd almost go so far as to say that it'll be better value for money than any other card available, even at 400! It looks to be extremely future-proof (for a GPU anyway).

    MuFu.
    Last edited by MuFu; August 21st, 2002 at 11:43 AM.
    Opteron 144@2.8GHz (stock HS/fan), Asus A8N-SLI SE (passive NB), 1.5GB RAM (2:3:2:5, 2T), WD Raptor 740GD 74GB, Maxtor DM10 300GB, Asus EN7600GT SILENT@???, M-Audio Revo 7.1, Nebula DigiTV, Dell 2005FPW, Enermax 431W Active.

  3. #3
    Join Date
    Oct 2000
    Location
    London, UK
    Posts
    955
    Cheers Mufu. You have yet again demonstrated that you are the master of all things technical!

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