Different Speed and rank and timing and voltage affect whether it works or not.  There is a reason why most makers don't list density or timing etc.  If they did you could match those parameters and test if the actual voltage and timing and rank for parts marked the same actually operate on the XMP profiles. You cannot use different profiles on each slot nor is mixing vendors and speed supported. • Default (JEDEC): DDR4-2400 CL17-17-17 [NAME].2V• XMP Profile #1: DDR4-3200 CL16-18-18 [NAME].35V• XMP Profile #2: DDR4-3000 CL15-17-17 [NAME].35V [URL] Kingston trys to wiggle out legally with this statement. All Kingston products are tested to meet our published specifications. Some motherboards or system configurations may not operate at the published HyperX memory speeds and timing settings. Kingston does not recommend that any user attempt to run their computers faster than the published speed. Overclocking or modifying your system timing may result in damage to computer components. This is also from Kingston and has DIFFERENT TIMING [URL] • Default (JEDEC): DDR4-2400 CL17-17-17 [NAME].2V• XMP Profile #1: DDR4-3200 CL16-20-20 [NAME].35V• XMP Profile #2: DDR4-3000 CL16-19-19 [NAME].35V   [URL] Their own site doesnt list Hyperx at all [URL]   Validated OEM memory = 983D4 32GB DDR4, 2666MHz, 4GX72, Unbuffered, 288 pin, Dual Rank, 1.2V, Non-ECCHynix HMAA4GU6AJR8N-VKMicron MTA16ATF4G64AZ-2G6B1, MTA18ASF4G72AZ-2G6E1Samsung M378A4G43MB1-CTD N205T 16GB HyperX Fury XMP DDR4, 3200MHz, 2GX64, Unbuffered, 288 pin, Dual Rank, 1.25V, Non-ECC, Kingston XN205T-MIE/XN205T-MIE2 RMWRN 16GB HyperX Fury XMP DDR4, 2933MHz, 2Gx64, Unbuffered, 288 pin, Dual Rank, 1.35V, Non-ECC, Kingston XRMWRN-HYA/XRMWRN-MIE/XRMWRN-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 DDR4, 2666MHz, 1Gx72, Unbuffered, 288 pin, Dual Rank, 1.2V, Non-ECCAdata AO2P26KCST2-BZJSHCHynix HMA82GU6CJR8N-VK, HMA82GU6DJR8N-VK, HMA82GU6JJR8N-VKKingston KTP9W1-HYJ, KTP9W1-MID, KTP9W1-MIEMicron MTA16ATF2G64AZ-2G6E1, MTA16ATF2G64AZ-2G6H1, MTA16ATF2G64AZ-2G6J1Samsung M378A2K43CB1-CTD, M378A2K43DB1-CTD W21KG 8GB HyperX Fury XMP DDR4, 3200MHz, 1Gx64, Unbuffered, 288 pin, Single Rank, 1.25V, Non-ECC, Kingston XW21KG-MIE, XW21KG-MIE2, XW21KG-HYD2 J69DF 8GB HyperX Fury XMP DDR4, 2933MHz, 1Gx64, Unbuffered, 288 pin, Single Rank, 1.35V, Non-ECC, Kingston XJ69DF-HYA/XJ69DF-MIE/XJ69DF-MIE2 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, 1.2V, Non-ECCAdata AO2P26KC8T1-BXGSHCHynix HMA81GU6CJR8N-VK, HMA81GU6DJR8N-VK, HMA81GU6JJR8N-VKKingston KY7N41-HYJ, KY7N41-MID, KY7N41-MIEMicron MTA8ATF1G64AZ-2G6E1, MTA8ATF1G64AZ-2G6H1, MTA8ATF1G64AZ-2G6J1Samsung M378A1K43CB2-CTD, M378A1K43DB2-CT  
Hi all,I have been reading multiple posts about the R11 and memory incompatibility. I have 16GB (2x8GB) Dell W21KG OEM HyperX Fury DDR4 XMP 3200MHz. It runs XMP2 profile AFAIK. Many owners tried the HX432C16FB3K2 and it did not work (but I believe that this runs on XMP1 profile so perhaps this is the cause?). I also believe that you can disable the XMP profile and they will then work but at reduced speeds. Following this limited research, I have two questions as I would like to have 32GB (I could not afford it at the time of purchase): > If I went with a different brand that is XMP2 such as Corsair 163301 Vengeance LPX, will this work alongside the current two modules that came with the machine given in is also XMP2?> The dell module configuration is 8 and 8 or 16 and 16. I have two 8GB modules and I was hoping to add either 2 more 8GB or 2 more 16GB, essentially mixing and matching brands and size, is this a) actually possible and it will work, b) recommended? Thank you in advance,Keith
Aurora 11, retail memory questions