please chill , ok.

what size sticks, and how many>? 

? and lay blame last after facts are known. 1st.

and let me guess you want the fastest memory on earth for say $15 , good luck with that dream. 

IDK

all top makers sell this,  corsair, and Kingston. (and is high end memory for a high end PC , sure)

ask them too,  learn to find the top makers and ask them.

this what you want , google it , win the price war.. $43 each I see 1st hit.

8GB DDR4 PC4-21300 2666MHz DIMM NON-ECC Unbuffered 288pin 1.2V CL15 Single-rank

shop around then learn what the street price is,  and it will not be cheap

What I want is a computer that allows me to upgrade using the parts that I prefer. NOT the proprietary parts that they designate. What I bought was 32GB of HyperX Fury DDR4-2666. And upon installation, the only thing that worked was the fans. 

Welcome to the Dell Community  @DunaTyphon 

Did you install:

1x32GB

2x16GB

4x8GB

Sorry but the Aurora R8 does not require proprietary memory.

Most people use and recommend Crucial !!!

https://www.crucial.com/usa/en/compatible-upgrade-for/Alienware/aurora-r8

These upgrades are guaranteed compatible when you order from Crucial.com

Alienware Aurora R8 Setup and Specifications:

https://www.dell.com/support/manuals/us/en/04/alienware-aurora-r8-desktop/alienware-aurora-r8-setup-and-specifications/specifications-of-alienware-aurora-r8?guid=guid-7c9f07ce-626e-44ca-be3a-a1fb036413f9&lang=en-us

I use 64gb of Hyper x fury ram at 2933 xmp. It's compatible, just not in combination with the oem stuff.

can I use this for my R8 ram?  I have 16gb on my r8 want to upgrade 32gb 

Brand: Crucial
Total Capacity: 16GB kit (8GBx2)
Warranty: Limited Lifetime
Specs: DDR4 PC4-21300 • CL=19 • Single Ranked • x8 based • Unbuffered • NON-ECC • DDR4-2666 • 1.2V • 1024Meg x 64 •
Series: Crucial
Form Factor: UDIMM
ECC: NON-ECC
Kit Qty: 2
Speed: 2666 MT/S
Voltage: 1.2V
DIMM Type: Unbuffered

DunaTyphon,

You can try to install anything you want. You obviously have no idea what you are doing. Instead of coming here to complain, you should have researched your pc first.

Dell has always used OEM (original equipment manufacturer) customized hardware purchased from the manufacturer. Everyone knows this!

I bought my R8 a couple of months ago, and I had several issues with the memory as well. I got Corsair Vengeance LPX DDR4 2666Mhz. I made sure i got same type and speed, but had issues regardless. The board takes up to 64 gb and had 16 already installed so I added 2x16 modules but the compatibility issue.

I want to know if this is true have you found out yet ?

I'm using G.SKILL TridentZ RGB Series 32GB (2 x 16GB) DDR4 3200Mhz DIMM CAS 16 F4-3200C16D-32GTZR

then I just installed another pair 32GB.

now I have 64GB, they work perfectly on my computer.