The following settings work for ALL games for the PS3 - they make the framerate smooth and the games look better. example SKATE, you can perform tricks 100% accurate after this. So please, try the
Zoom In On Your Browser Window: Open the web browser on your PS3 by heading to Network on … Setting up a wireless Internet connection using the Scroll down and select [Internet Connection Settings]. When you are asked if it is okay to disconnect the PlayStation 3 system from the Internet, select [Yes]. When you are asked to choose a [setting method], select [Custom]. When you are asked to choose a [connection method] , select [Wireless]. PS3 Optimal Network Settings Guide - PlaystationTrophies.org
Does Changing MTU Settings Really Affect Download Speeds
PS3 Guide - PlayStation 3 Wiki Guide - IGN
How to Connect Your PS3 to the Internet - YouTube
PS3™ | Internet Connection Settings (advanced settings) Select (Settings) > (Network Settings). 2. Select [Internet Connection Settings]. Select [Yes] when a confirmation screen is displayed stating that you will be disconnected from the Internet. 3. Select [Custom]. Adjust each item as necessary for the network environment in use. The items displayed vary depending on the settings you have selected. Perfect Gaming Internet Connection Guide (PS3) - YouTube