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Yeesh, these people.... you need at least 60fps to have non-choppy framerates. Plain and simple. >>
Have you ever played a flight sim?
35 FPS is perfectly acceptable, on almost any flight sim. Hell, there are flight sims out there stressful enough that you will never see an average frame rate above 45FPS even with a GF3 Ti500 and a P4 2.2GHz/AthlonXP 2000+. If you consider 35-40FPS unplayable then your telling me some high end flight sims are unplayable on virtually any hardware available on the market at any cost?
In most flight sims I find it extremely unlikely you would find 35-40FPS choppy because objects don't move incredably fast onscreen.
In a shooter like Quake 3 on the other hand, objects on-screen move quickly, esp. with twitch moves of the mouse. In such a situation low framerates are much more visible.
IMHO, what is an "acceptable" frame rate varies considerably depending upon what type of game it is. Some games simply don't have a lot of fast action movement on-screen. Simulations, RPG's, strategy, puzzle games... etc. (albeit, there are occasional exceptions in each genre)
In all of those genres your unlikely to visually notice much of a difference between 35FPS or say 70-FPS, as objects on-screen generally arent going to be moving very fast, and there are no split second twitch movements of the mouse to jerk your character around as one might find in other genres (First Person Shooters comes to mind as being a genre especially dependent upon high frame rates).
First Person Shooters, other Action games, some (most) adventure games, would be examples of genres in which low frame rates are much more likely to be visible as almost every object on the screen is constantly moving at a rapid rate in most situations, and with a simple twitch of the mouse you could jumps/spin/turn.
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<< 35 to 40 fps does not look choppy to me >>
you are missing out...
people who say they dont need it havent used it.
then they reply, "well i did at a friends house!"
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For the games I play I usually find approximately 28-30FPS as being 'acceptable'... (sometimes as low as 24 depending on the game) and the point at which I can no longer notice jerkiness or slow-down in the gaming.
For me, this references RPG's, and sports games as those are pretty much the only type of games that hold any entertainment value for me.
From your statement above you imply that if I find 40FPS acceptable then I must not have used higher frame rates before, and so don't know what it's like.
I have Quake3 loaded on this machine (mostly for benchmarking purposes). In this specific game I can easily attain average frame rates over 100FPS with little difficulty.... so obviously I do know what higher frame rates look like.
As you may know one has the ability in Q3 to cap the frame rate at any given number. I can cap the frame rate at 40FPS in Q3 so the frame rate never goes above 40, and guess what?
I don't notice even the slightest difference between that and my more typical frame rates of 100+ FPS. Obviously, I know what higher frame rates are like... but I still don't need it.
Everyone has different eyes, and everyone has different preferences.... not everyone is going to notice a slowdown at any given frame rate. Also, games are different in the manner in which they run... 35FPS in one game may seem choppy, but in a different type of game 35FPS may seem perfectly smooth.
There is a similar debate over frame rates going on in
this thread, entitled "60fps=slide show (poll)".