Replacing memory module for XPS 8390

Question

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

mariko57 · Answer

Typo above: It's an XPS 8930. Sorry for any confusion.

redxps630 · Answer

Dell oem ram for 8930

Memory	Dual In-Line Memory 4GB, 2666, 1RX16, 8G, DDR4, NU 4GB (1X4GB) DDR4 non-ECC Memory
Memory	RAM module (DIMM), 4GB, 2133, 1RX8, 4G, DDR4, NU 4GB (1x4G) 2133MHz DDR4 Memory
Memory	RAM module (DIMM), 4GB, 2400, DDR4, 4G, BCC, UD, S 4GB (1x4GB) 2400MHz DDR4 Memory BCC
Memory	RAM module (DIMM), 8GB, 2400, 1RX8, 8G, DDR4, NU 16GB (2x8GB) 2133MHz DDR4 Non-ECC
Memory	RAM module (DIMM), 8GB, 2400, DDR4, 4G, BCC, UD, S DIMM, 16G, 2X8, 2400, BCC, UD, S
Memory	RAM module (DIMM), 8GB, 2666, 1RX8, 8G, DDR4, NU 16GB (2x8GB) DDR4 2666MHz UDIM M Non-ECC
Memory	RAM module (DIMM), 16GB, 2666, 2RX8, 8G, DDR4, NU DIMM, 64GB, 4X16G, 2667, UD, NE

redxps630 · Answer

Any matched pair of ddr4 2400 non ecc for desktop only should work.  2x16 should work.

mariko57 · Answer

Thank 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?

redxps630 · Answer

If you pull the other good pair and reinstall the 'bad pair' do you get the hw problem? if yes pull one of the ram from the 'bad pair' to test.  if both gave problem then replace just that pair

XPS Desktops

Replacing memory module for XPS 8390

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