Well, now there is Kernal which can help you boost your Xperia to top speed by overclocking it to 1.3GHz which is very good enough to play very high games, so here is a tutorial to do that.
What you needed:
Unlock the bootloader - Do it guide here
Download kernel here: 1.3 GHZ kernal
How to overclock guide:
- Download flashtool from here''http://androxyde.github.com/index.html?1360795419000''
- Open flashtool and add ur device.follow the link ''http://forum.xda-developers.com/showthread.php?t=2033114''
- Tap on volume up button and connect the usb cable.a blue light will indicate.
- Now you are in fastboot mode.
- Then open the thunder icon.
- Click on fastboot mode.
- In fastboot windows click ''Slelect kernal to flash''
- Now navigate to ur kernal
- Flash will start
i have tested it and i worked fine.