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Replacing memory module for XPS 8390
Current set-up: 4 8GB memory sticks (32GB total).
Various tests (including memtest86) indicate memory problem.
1) For compatibility reasons, do I need to replace all 4 sticks? If not, how do I determine what brands would work if I replace just a pair?
2) In the manual, the memory configuration "matrix" shows that for 32 GB, you need 4 8GB sticks. Does this mean getting two 16 GB sticks wouldn't work? In other words, is this "matrix" in the manual required placement, or suggested placement?
Thank you.
Dell XPS 8390
Windows 11
Dell oem ram for 8930
Memory Dual In-Line Memory 4GB, 2666, 1RX16, 8G, DDR4, NU
4GB (1X4GB) DDR4 non-ECC MemoryMemory RAM module (DIMM), 4GB, 2133, 1RX8, 4G, DDR4, NU
4GB (1x4G) 2133MHz DDR4 MemoryMemory RAM module (DIMM), 4GB, 2400, DDR4, 4G, BCC, UD, S
4GB (1x4GB) 2400MHz DDR4 Memory BCCMemory RAM module (DIMM), 8GB, 2400, 1RX8, 8G, DDR4, NU
16GB (2x8GB) 2133MHz DDR4 Non-ECCMemory RAM module (DIMM), 8GB, 2400, DDR4, 4G, BCC, UD, S
DIMM, 16G, 2X8, 2400, BCC, UD, SMemory RAM module (DIMM), 8GB, 2666, 1RX8, 8G, DDR4, NU
16GB (2x8GB) DDR4 2666MHz UDIM M Non-ECCMemory RAM module (DIMM), 16GB, 2666, 2RX8, 8G, DDR4, NU
DIMM, 64GB, 4X16G, 2667, UD, NEThank you for your reply though I don't understand the chart. I did pull a pair of sticks and now the memory diagnostic test no longer indicates a hardware problem.
The pair that I pulled are each Hynix 8 gb 1Rx8 PC4-2666v-UA2-11.
You are saying I can just replace this pair?
mariko57
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Posted October 4th, 2025 12:33
Typo above: It's an XPS 8930. Sorry for any confusion.