No, it's not true that only Dell RAM can be used (in fact, Dell makes no memory - there is no Dell RAM).  However, high performance RAM generally fails to work because of its aggressive timing -- which you cannot adjust. There are manufactures that certify RAM to work -- Kingston, Crucial and others -- in specific systems.    
Hello everyone, I'm the proud owner of a new Inspiron 16 Plus 7610, 16GB RAM & 1TB SSD with the 3050 graphics. I've bought 2 x 16GB Corsair Vengance DDR4 3200MHz SODimms to upgrade the memory. But when I install them, the laptop refuses to boot.  When I installed I put the laptop into service mode. I've also tried disconnecting the battery, holding down the power switch for 30 seconds, removing & reinstalling the memory and reconnecting everything, but no good. Replacing the original memory, all good again. I've read that Dell laptops can be 'locked down' so they will only accept Dell memory - surely that's not true ? This is a link to the RAM I bought : Corsair Vengeance 32GB DDR4 SODIMM 3200MHz Dual Laptop Memory Kit LN110599 - CMSX32GX4M2A3200C22 | SCAN UK Anyone have any ideas what I could try ?  Thanks.
Inspiron 16 Plus Memory Upgrade Issue