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Slimebeast on 12 January 2010
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disolitude said:
Slimebeast said:
Ssenkahdavic said:
Slimebeast said:
Ssenkahdavic said:
Slimebeast said:
Why is they all nneed 120hz? Why doesnt 60 frames per second is enough? I mean thats 30 frames for each eye, 30fps is enuff in most games.

120hz/60hz (hz = cycles per second) and fps are two very different things.  Most tvs flicker at 60hz, so those 30fps games are drawn with 2 frames (or 4 times for 120hz tvs) per cycle.  This makes motion look more natural.  If your TV flickered at the exact same rate as your 30fps game, you/most people would suffer pretty bad headaches.  This is why most lights in your house flicker at 60hz. 

A blueray (in NA atleast) is 24fps.  For a 60hz tv, those images are drawn in a 3:2 ratio (first 3, second 2, etc per pass).  120hz takes away this problem by 120/24= 5 (a whole and easy number) so no need for 3:2 pulldown. 

For 3D, as they are saying, 120hz will be split twice for both of your eyes.  Either by 1 full signal of 1080p/720 @120hz or two 1080/720 signals @60hz (for each eye). Or if they use Checkerboard, they only need half of the full resolution per eye (still at 60hz)

 

Im a lil too tired to explain properly, but what u write doesnt indicate anything special for 3D.

If say my TV or monitor is 100hz pr 60hz what does it matter when I usually aim for 30 frames per second in my PC games and it looks fine.

The question still is, why need 60 fps for 3D games (yes actually 120fps, but 60 for each eye) when 30fps is perfectly enough in normal games?

Im just pointing out that FPS and hz (refresh rate) are in no way the same.   They cannot be interchanged as you have done.  The only way they can, is if both the output (fps) and the refresh rate of the monitor/tv/whatever are exactly the same (ie 30fps and 30hz).  In this case it works because 1 cycle = 1 frame.

 

 

But then how do you explain that these 3D games require both a 120 frames per second output from the GPU and a TV screen that is capable of 120Hz?

It's my clear understanding that fps and Hz correlate.

They don't...

Here is an analogy.

Lets say you are someone that can stick a bannana up your butt 60 times and scream 60 times. You can not do 3D...

Ssenkahdavic up there can stick a bannana up his but 60 times, but he can fake it and scream 120 times...he is the current gen of "120 hz" TVs that you can buy in stores. Not real 120 hz. Can't do 3D.

Me on the other hand, I can stick a bannana up my butt 120 times and scream 120 times...I can do 3D.

 

Now back on subject...just because I can take the signal and show it 120 times doesn't mean that the video card will have a frame ready for me to show. If it doesn't...a gamer will experience chugg and slowdown. Everything will still be in 3D cause the screen is refreshing the signal and sending it to each eye...but the gameplay will chugg like a mofo.

Hope my bannana up the butt explanation helps.

No it didn't lol.