It will speed up your boot times as well as your program load times. It won't do anything for making your processor or gpu more capable or allow to play/run things you couldn't before.
You have 7 sata2 ports as far as I could tell so dont expect to see the large 500MB/s sequential speeds you would see on sata3 ports but 240+ is still really good considering you rarely use sequential anyways; random speed is where you will be most of the time and those speeds can't saturate a sata2 bus.
The only concern is if you can mount the ssd on a non-raid sata port and if you can't then how do you pass a single drive thru the raid controller? Usually its a single drive raid1 or JBoD.