Wow, what an idiot, took me all of five seconds to find a sata power cable, I just assumed it didn't have any. I had no recollection of seeing one before, I thought as the PSU had a few years on it perhaps it was before they were added as standard, but no, it's there. Thanks for that.
I had thought the majority of sata cables would reach 6Gb/s and that sata 3 cables were a bit of a gimmick. Guess I'll have to add one to my shopping list.
Thanks for your help.