visual differences between M17x R1 R2 and R3 ??

Hi,
Could someone tell me the visual differences between the M17xR1,R2 and R3?
Someone is selling the R3 but I don't have a clue to make suref its really an MxR3?
Thank you for your help.

 

The R1 and R2 are very easy on the eyes and the R3 is the fugly one ... Just kidding.

The CPU's on R1's are Core 2 based, R2's are Core i based (3 digits denote the CPU model) and the R3 is 2nd gen Core i based (4 digits denote the CPU model). Physically you cant really see a difference between the R1 and R2 apart from looking at the CPU sticker underneath the notebook.

The R1 and R2 have a strip of media touch capacitive buttons above the keyboard for volume, media, wifi,etc control with only the icon for the button lit up. The R3's is physical media buttons arranged in between a wavy design thingamabob. Easiest way to spot the R3 though is by the black brushed metal bezel around the keyboard which the R1/R2 dont have.

Or you could also just do a simple google search for "Alienware M17x R3 review"... its not difficult at all... for reals

 

thank you so much for the answer.I did a google search but i couldnt find clearly the differences between the 3.
and does all the R3 models can accept 32 GB ram if there is a quad core on it?

 

If you get the service tag from that person I would be able to see it on our system. All R3's should be able to run the 32Gb with the Corei7.