most of the Dell oem ram for A51 R4/R5 overlap with Dell oem ram for Aurora R7 you do not have to buy oem ram directly from Dell. often better to use memory maker's model number. TP9W1 16GB, 2667MHz, DDR4, 1Gx72, 8K, 288 pin, 2Rx8, Dual Rank, Unbuffered, 1.2v, Non-ECCHynix HMA82GU6CJR8N-VKKingston KTP9W1-MIEMicron MTA16ATF2G64AZ-2G6E1Micron MTA16ATF2G64AZ-2G6H1Samsung M378A2K43CB1-CTD RMWRN XMP 16GB, 2933MHz, DDR4, 2Gx64, 8K, 288 pin, 2Rx8, Dual Rank, Unbuffered, 1.35v, Non-ECCKingston XRMWRN-HYAKingston XRMWRN-MIE J69DF XMP 8GB, 2933MHz, DDR4, 1Gx64, 8K, 288 pin, 1Rx8, Single Rank, Unbuffered, 1.35v, Non-ECCKingston XJ69DF-HYAKingston XJ69DF-MIE Y7N41 8GB, 2667MHz, DDR4, 1Gx64, 8K, 288 pin, 1Rx8, Single Rank, Unbuffered, 1.2v, Non-ECCHynix HMA81GU6CJR8N-VKKingston KY7N41-MIEMicron MTA8ATF1G64AZ-2G6E1Micron MTA8ATF1G64AZ-2G6H1Samsung M378A1K43CB2-CTD credit: Dell Chris M
Hi, Today I tried upgrading my RAM sticks from the original 2x8GB to 2x16GB. The specifications say the following sticks should be compatible, but it doesn't work? The new ones are 2x16GB Corsair Vengeance LPX DDR4-2666MHz. Now when I install them, the Area-51 R4 won't boot up (no video signal) and it's constantly giving the 2 times beeping sound. User's Guide tells for this beeping code "no memory detected". I already tried several times installing with the right firm push and two clicks, so it should sit right in there physically. Even trying one single stick first every time in any slot. Still not working. As soon as I put in the old RAM sticks everything's working fine. If I try to install the 2 new sticks parallel to the old 2 Sticks in place (so at that time 2x8GB and 2x16GB in slots) the desktop won't boot up and 2 beeps constantly. What's wrong? Is it an inferior BIOS or motherboard from Dell Alienware? Am I doing something wrong? Because I installed RAM on several other desktops without problems up so far.
Area-51 R4, 2x16GB Corsair Vengeance, not booting