"Essentially this means that with double-buffered VSync, the framerate with a 60Hz refresh rate, the only framerates you can get are 60, 30, 20, 15, 12, 10, etc etc. You can see the big gap between 60 and 30 there. Any framerate between 60 and 30 your video card would normally put out would get dropped to 30."
http://hardforum.com/showthread.php?t=928593
Since Skyrim's fps can be anywhere between 30 and below 20, not just the fixed numbers 30, 20, 15 it's obviously not double buffered vsync.
So where can I turn off the vsync on my ps3?
You can't. It depends on the developer if a game supports vsync or doesn't.
come to think of it as said on a previous comment im all for disabling fxaa and adding motion blur, do you think bethesda could add motion blur to skyrim via patch? Uncharted 3's campaign and multiplayer is getting patched with motion blur i dont see why skyrim cant do this too. Also im down for disabling fxaa and v-sync they only cripple performance and fxaa brings nothing new to the table only negatives in term of picture quality.
Motion blur and anti aliasing are totally different effects. Motion blur helps to make movement appear smooth, especially fast movement, but it doesn't help against jagged edges. Well to a certain degree it helps, if you look fast around everything gets blurred and therefore you can't notice edges. But if you move slowly, like try to pick something up from a shelf ingame you can't really add motion blur to that, otherwise the game would just be blurry as hell and not very playable.
Motion blur is great to achieve a sense of speed while you're running or something like that but it's no replacement for anti-aliasing. Uncharted 3 has still Anti-Aliasing.
The downside of post-processing-anti-aliasing like FXAA or MLAA is, that they don't always look the same. It completely depends on how they are implemented. FXAA doesn't have to look like this. This is probably one of the worst implementations of FXAA I've ever seen. But it's fixable and it could smooth the edges without the overall blur and one of the advantages of FXAA is the low hit on performance. It's basically for free. So fixing FXAA would be the better choice than to disable it.
Also I think some overestimate the benefits of disabling vsync. It's not like that the PS3 version would suddenly run fine without fps drops and a stable framerate. A couple of fps more maybe and tearing instead, but still choppy. Bethesda has to fix whatever is broken that causes the big fps drops.