Your drive is operating above advertised specs.
Advertised AS-SSD specs for your drive are "up to" 175MB/s Read and 60MB/s Write.
You are getting 113% of advertised Reads and 103% of advertised Writes.
Benchmark with ATTO software if you are looking for the advertised 500/450 Read/Writes speeds.
Here's the link to the spec sheet of your drive: http://www.ocztechnology.com/res/manuals/OCZ_Solid3_Product_sheet.pdf