Bios would not support all 4 high speed ram.  With one old slower ram present bios is able to downclock the rest three high speed ram.  Dell bios is limited not like ASUS etc. that can support OC ram. rtx3000 gpu is validated in R4.  [URL]
Hey, I have an old Alienware Aurora R4 that need some love. motherboard ids as Alienware 07JNH0 I have two questions: 1. Will it support DDR3 2133MHz memory? I've seen other replies saying it will, but the documentation only says 1866MHz, though that probably just outdated. 2. Will it support an RTX 3050/60 or thereabouts? I understand the older PCIe slot might limit performance, but it should fit. Thanks in advance.
Aurora R4, in need of love