Hi sifu here, do you guy know how to set 2 units pcie ssd for Alienware 15 ? My original setting was first pcie ssd as OS, normal HDD as data drive. Today I just bought another pcie ssd and thinking to set as gaming drive, but Windows won't book-up after I install 2nd SSD. System just stop at "ALIENWARE" word. Do you guys got any idea ?
Ok, I found the solution:

Alienware default BIOS setting for harddrive is RAID operation that allow user to install 2 units same 2280 SSD for running either RAID-0 or RAID-1. If we want to run 2 difference size SSD , we need to switch from RAID to AHCI that allow all SSDs to run separately. Following is step to switch from RAID to AHCI controller:

1. Click the Start Button and type cmd
2. Right-click the result and select Run as administrator
3. Type this command and press ENTER: bcdedit /set {current} safeboot minimal
4. Restart the computer and enter BIOS Setup
5. Go to Advance Setting, Change the SATA Operation mode to AHCI from either IDE or RAID
6. Save changes and exit Setup and Windows will automatically boot to Safe Mode.
7. Right-click the Windows Start Menu once more. Choose Command Prompt (Admin).
8. Type this command and press ENTER: bcdedit /deletevalue {current} safeboot
9. Reboot once more and Windows will automatically start with AHCI drivers enabled.

Hope this will help for anyone who thinking to add additional PCIE SSD into their AW.

Highly tempted but undecided 
Got everything like conformal coating, conductonaut in my Lazada shopping cart.
Small mistake and magic smoke comes out

My observation AW15 R4 requires a lot of disassembly before reaching heat sink.

Take a look at service manual, for idea how much components have to come off here.

Removing bottom cover, you can see the heat-sink assembly buried deep.
[attachmentid=10213584]

AW M15 much more serviceable, heat-sink easier to get at IMHO.
[attachmentid=10213585]

Think you got most of the basic stuff needed.

Yup found the same conformal coating RM46 on lazada.
Tho some recommended using nail varnish as substitute.

Might want to add foam barriers to catch any LM balls escaping from under the heatsink.
http://forum.notebookreview.com/threads/fo...e-guide.817207/

Good luck with LM your laptop.