Samsung 830 128GB SSD Benchmarks on SATA III

$ hdparm -Tt /dev/sda

/dev/sda:
 Timing cached reads:   15558 MB in  2.00 seconds = 7783.64 MB/sec
  Timing buffered disk reads: 1458 MB in  3.00 seconds = 485.44 MB/sec

$ dd if=/dev/zero of=tempfile bs=1M count=1024 conv=fdatasync,notrunc
  1024+0 records in
  1024+0 records out
  1073741824 bytes (1.1 GB) copied, 3.83493 s, 280 MB/s

$ echo 3 > /proc/sys/vm/drop_caches
$ dd if=tempfile of=/dev/null bs=1M count=1024
  1024+0 records in
  1024+0 records out
  1073741824 bytes (1.1 GB) copied, 3.19219 s, 336 MB/s
$ dd if=tempfile of=/dev/null bs=1M count=1024
  1024+0 records in
  1024+0 records out
  1073741824 bytes (1.1 GB) copied, 0.172581 s, 6.2 GB/s