Digitehk

Check this out man~

Does the M17x R4 have true SATA3? | NotebookReview

From what I understand, you shouldn't be having this issue at all, it was a R3 problem w/ their A10 bios, going back to A8 solved their problems, though that a whole different motherboard.

Here's the article on that if you're curious: M17x R3 SATA III complaint | NotebookReview

Have you thought about using the A11 or Pre-A10 unlocked bios'? It might solve your issue~

Good luck! Let us know

Hey brother!

this is what I've found on the topic,

will 1866mhz ram run at 1866mhz on a R4? | NotebookReview

On post #11 he posts a picture of his Alienware m17r4 successfully accepting 2133Mhz.

I cannot guarantee you will have results, but it sounds legit!

20 days late... but your question was NOT answered previously, Good luck!

Brilliant! This will really increase the capability and bring upgradability to another level!

Thank you so much!