For gaming, 30+ is playable. Below that, the framerate is too jumpy for me to enjoy. My monitor's refresh rate is 60Hz, so obtaining 60 FPS makes the experience much more fluid and enjoyable.
The 24 FPS thing is a trick that 120/240Hz TV's use to blend photos together and refresh the screen in a way that makes the picture look very realistic due to the fact that films are captured at 24 FPS. This idea is great for movies, but doesn't translate to gaming performance.
Sigh. What you're describing doesn't seem very relevant.
The same essential principles have been used for a REALLY long time to create the impression of very fluid movement.
The same tricks we use today were used in Victorian era toys, magic lanterns, flip books, and early animation.
Movies and TV -- same again.
And videogames -- same again.
It has little to do with technology and everything to do with how our bodies respond to sequences of images being flashed before us at 1/24th of a second or 1/30th of a second.
At the end of the day, we can't process that fast, and we end up "interpreting" the sequence as movement.
If I recall from my film school days, the two key principles are "persistence of vision" (physiological) and the "phi phenomena" (psychological).
Seriously.
24fps should be smooth as silk.
In many cases, this is literally what you see when you pay $15 to go to the movies -- and I doubt you EVER complain that it is jaggy.
30fps (60 fields) is exactly what people watched for years on TV -- and I'm pretty sure still do -- and I've NEVER heard anyone complain broadcasts are/were jaggy.
No clue why games would be any different.
They are operating on the same animation principles.
If you ever work in Adobe Flash, you should see what I mean.
As long as you aren't shifting an object by 20,000 pixels every 24th of a second -- and nothing in ashes moves remotely that fast, as far as I know -- the movement should be pretty fluid.
In my experience, 18-20 fps is where it starts to break down.
Higher than that, and you should be looking at something that appears pretty damn fluid.
Unless you're superhuman.
I just don't get the fps fetish. Makes zero sense to me.
How do you get more fluid than the perfect illusion of continuous real world movement?!
I don't understand!!!
But glad that OP now runs at 70fps, I guess???
(Certainly a good thing to know that dual channel is now working, at any rate. This DOES make a difference. 
)
