S3 benchmark test?

So i am using antutu benchmark on my galaxy s3 (tmobile) and the scores seem incredibly low, my first test it scored about 10500 so i restarted thinking that it might help and it scored 9196... Any reason to this? Because i then restatred my nexus 7 1st gen and it scored a 12317 and last time i checked a nexus 7 should not outscore a galaxy s3