If you found crucial ballistix 1.35v CL16 32gb 3200mhz ram kit then go ahead and buy it i have that kit it’s amazing . It’s 2666mhz 1.2v at stock so i activate the XMP to be 3200mhz with 1.35v . and for the heatsink i have p870 i got my modded heatsink from developer79
Don't worry about the thermal pads. It will be easy for you to adjust their thickness when installing the card. The important thing is to find the modified heatsink for RTX 3080.
i bought my ram & RTX 3080 from ebay in used condition 60 USD for ram and 370 USD for gpu ... but gpu looks new when arrived from this seller and bought the modded gpu vapour chamber heatsink from Developer79
https://www.ebay.com/itm/204675787869?_trkparms=amclksrc%3DITM%26aid%3D777008%26algo%3DPERSONAL.TOPIC%26ao%3D1%26asc%3D281663%26meid%3Dc0f28afed0994baf9d9e35d0714febd3%26pid%3D101771%26rk%3D1%26rkt%3D1%26mehot%3Dpp%26itm%3D204675787869%26pmt%3D0%26noa%3D1%26pg%3D4375194%26algv%3DWatchlistVariantWithMLR_BP%26brand%3DCLEVO&_trksid=p4375194.c101771.m47999&_trkparms=parentrq%3A460fd82a1950a8dc244071a5ffff788a|pageci%3Ade76c662-f4d2-11ef-bc84-aa661d18f299|iid%3A1|vlpname%3Avlp_homepage
Crucial Ballistix 3200 MHz, DDR4, SODIMM, Memory Kit, 64GB (32GB x2), CL16, 1.35v
is the best ram for your laptop and it's very rare you can buy it in used condition
Download the original Alienware unmodded A03 bios from Dellat Drivers and Downloads | Dell [united States] The file is named "M18R2A03WIN"
Extract the contents of M18R2A03WIN to a new folder named "Alienware recovery" anywhere on your useable computer. In there you should have a bunch of files. (9 in total)
Look for the one called QBR10EC.fd
Rename this file to M18R2.hdr
Place the file M18R2.hdr on a formatted fat32 usb stick on its own.
Thats it. Blind created
Recovery process:
To do the recovery process you need to remove your m18x r2 battery.
Unplug the back power cord as well
Plug the usb stick with the file M18R2.hdr in the M18X's e-sata port
Now hold down the END key (located above the numbers key pad) at the same time while your holding the END key plug in the power cord only, you will hear the fans turn on full bolt.
Release the end key and wait
After a few seconds once the file is read from the USB stick you will hear 20 or 30 beeps (sounds like a garbage truck reversing)
After the beeps stop the m18x will shut down and reboot itself. ( 1 or 2 times depending)
Once reboot all will be back to normal A03 bios.
Connect the battery back if you wish after successful boot.. That's all folks, things should work now unless you bricked the EC controller, which is hard to do.