Looking for a custom ROM that gives you performance? Well, FoxHound ROM has been known traditionally for great overclocking and performance with the Galaxy S2, now it’s also available for your Galaxy S3 GT-i9300, giving you up to 1.8Ghz of overclocking. In daily usage, I was able to get stable 1.7Ghz overclocking and near 6500-7000 in Quadrant benchmarking scores.
Of course, overclocking your Galaxy S3 doesn’t mean it’s simply going to drain the battery, with the correct governor you can possibly get even more battery life and performance. Although still in infant stages of ROM development, the FoxHound ROM is a solid performer and you should give it a try if you haven’t yet!