For 32 Gb you can do 4x8 GB or 2x16 GB.  do you want to replace the current 16 gb or add to them?  Is your current 16 GB = 2x8 GB?

if you have 2x8 and wish to add 2 more to make it 4x8, best chance of success is to get ram identical to your current oem.  look at your service tag Product spec to know your current ram model number or DP/N then use the following table to search on eBay for two more of the same ram.

Validated OEM (original equipment manufacturer) memory =

0N6VG 16GB, HyperX Fury XMP DDR4, 3400MHz, 1GBx8, Unbuffered, 288 pin, Dual Rank, 1.35V, Non-ECC, Kingston X0N6VG-HYD2
JV223 16GB, XMP DDR4, 3400MHz, 2Gx64, Unbuffered, 288 pin, Single Rank, 1.35V, Non-ECC, Kingston XJV223-HYA, XJV223-MIE


N205T 16GB, HyperX Fury XMP DDR4, 3200MHz, 2GX64, Unbuffered, 288 pin, Dual Rank, 1.25V, Non-ECC, Kingston XN205T-MIE/XN205T-MIE2
W21KG 8GB, XMP DDR4, 3200MHz, 1Gx64, Unbuffered, 288 pin, Single Rank, 1.25V, Non-ECC

RMWRN 16GB, HyperX Fury XMP DDR4, 2933MHz, 2Gx64, Unbuffered, 288 pin, Dual Rank, 1.35V, Non-ECC, Kingston XRMWRN-HYA/XRMWRN-MIE/XRMWRN-MIE2
J69DF 8GB, HyperX Fury XMP DDR4, 2933MHz, 1Gx64, Unbuffered, 288 pin, Single Rank, 1.35V, Non-ECC, Kingston XJ69DF-HYA/XJ69DF-MIE/XJ69DF-MIE2

RGM6C 16GB, HyperX Fury XMP DDR4, 2666MHz, 2Gx64, Unbuffered, 288 pin, Dual Rank, 1.25V, Non-ECC, Kingston XRGM6C-MIB/XRGM6C-MIE/XRGM6C-MIE2
TP9W1 16GB, HyperX Fury XMP DDR4, 2666MHz, 1Gx72, Unbuffered, 288 pin, Dual Rank, 1.25V, Non-ECC,
5H5PW 8GB, HyperX Fury XMP DDR4, 2666MHz, 1Gx64, Unbuffered, 288 pin, Dual Rank, 1.25V, Non-ECC, Kingston X5H5PW-MIB/X5H5PW-MIE/X5H5PW-MIE2
Y7N41 8GB, DDR4, 2666MHz, 1Gx64, Unbuffered, 288 pin, Single Rank, 1.25V, Non-ECC

TP9W1 16GB DDR4, 2666MHz, 1Gx72, Unbuffered, 288 pin, Dual Rank, 1.25V, Non-ECC
Adata AO2P26KCST2-BZJSHC
Hynix HMA82GU6CJR8N-VK, HMA82GU6DJR8N-VK, HMA82GU6JJR8N-VK
Kingston KTP9W1-HYJ, KTP9W1-MID, KTP9W1-MIE
Micron MTA16ATF2G64AZ-2G6E1, MTA16ATF2G64AZ-2G6H1, MTA16ATF2G64AZ-2G6J1
Samsung M378A2K43CB1-CTD, M378A2K43DB1-CTD

Y7N41 8GB DDR4, 2666MHz, 1Gx64, Unbuffered, 288 pin, Single Rank, 1.25V, Non-ECC
Adata AO2P26KC8T1-BXGSHC
Hynix HMA81GU6CJR8N-VK, HMA81GU6DJR8N-VK, HMA81GU6JJR8N-VK
Kingston KY7N41-HYJ, KY7N41-MID, KY7N41-MIE
Micron MTA8ATF1G64AZ-2G6E1, MTA8ATF1G64AZ-2G6H1, MTA8ATF1G64AZ-2G6J1
Samsung M378A1K43CB2-CTD, M378A1K43DB2-CTD

This is the fastest oem-memory for your system which is guaranteed to work by Dell. Crucial is the best aftermarket choice but not guaranteed to work with future bios-updates.

Alienware Desktops search = Aurora R10, ram upgrade

Yes!

I'm currently running 1X16GB so would it be best to go 2X16GB?

Crucial  Ballistix gaming memory work fine in the the R10 even after a few bios updates .

The problem is they discontinued the Ballistix product last year but you can still find them on the internet.

@Real_Boy85​  what bios setting did you use to get it to recognize the 3200mhz and successfully boot with the setting at 3200?