Is my MacBook Pro early 2011 SATA II or SATA III ? Model Identifier: MacBookPro8,1

Hello all,
I'm thinking about updating my HD to a SSD to give my "mature" MAC an speed bump.
QUESTION:
Is my MacBook Pro early 2011 SATA II or SATA III ????
Model Name: MacBook Pro
  Model Identifier: MacBookPro8,1
  Processor Name: Intel Core i5
  Processor Speed: 2.4 GHz
  Number of Processors: 1
  Total Number of Cores: 2
  L2 Cache (per Core): 256 KB
  L3 Cache: 3 MB
  Memory: 4 GB

Hold down the option key and, under the Apple () menu, select System Information. Under Hardware, look at the SATA/SATA Express tab and you'll see:
6 Gigabit is SATA III speed.
Good luck,
Clinton
MacBook Pro (15-inch Late 2011), OS Mavericks 10.9.4, 16GB Crucial RAM, Crucial M500 960GB SSD, 27” Apple Thunderbolt Display

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