I am bumping this post, plus, I have to mention that the same low perfomance affects other laptops from different manufacturers with this chipset (Intel PM55)
Specifically for the Alienware M17x - R2 there are many users that report the same behavior with different SSDs as well.
Any suggestions are welcome (especially from Intel representatives)
I would like you to take a look at this as well and see how the real world performance is affected due to this problem
Interesting article, thanks. It’s a shame you have not had any response from Intel or Dell. Have you tried getting through to an Alienware tech guy at Dell?