A while ago I purchased 2 × 2 GB Sticks of RAM for my Dell OptiPlex 320.  When I inserted them, I was greeted with a series of beeps, and a system that would not boot.  I checked each stick, and individually they work, just not as a pair.

If I insert one 2 GB and one 1 GB, then the BIOS detects both (reporting 3 GB installed: 1 × 2 GB and 1 × 1 GB) and will boot, but Windows (8.1.1) can utilise only 1 GB.  How can I get both sticks to work, thus giving me 4 GB RAM?

  • The sticks in question are identical Kingston KVR533D2N4/2G modules and do not have ECC.
  • The system is a July 2007 one, and the technical specifications list it as being capable of using up to 4 GB.
  • 1. which version of windows, 2. did you check if your motherboard can handle 4 GB of ram from the manufactures specs? – Outdated Computer Tech Aug 3 '14 at 17:38
  • @Sickest Win 8.1.1, yes, I did, read the OP – ja_ke Aug 3 '14 at 17:44
  • in memory overview it says this: NOTICE: Do not install ECC memory modules. Doing so may cause the system not to boot or affect performance. – Outdated Computer Tech Aug 3 '14 at 17:48
  • @Sickest I do not have ECC modules, I specifically made sure the ones I purchased were non-ECC – ja_ke Aug 3 '14 at 17:49
  • Bump, need to get this resolved... – ja_ke Aug 3 '14 at 18:37

Make sure you have the latest version of the BIOS installed from Dell's website. We have a few 320's running here with 4GB of RAM.

Be sure the sticks match in specs, ie the same speed and both are non-ECC.

  • asking questions in your answer? – Outdated Computer Tech Aug 3 '14 at 17:46
  • I have, although I will check, and it's a pair of identical Kingston "KVR533D2N4/2G" Sticks. – ja_ke Aug 3 '14 at 17:47
  • What month/year are the 320's you have? – ja_ke Aug 3 '14 at 18:38

4 GB of RAM will work only if you have no graphics card.  The 320 disables the 2nd RAM slot when a graphics card is present.


Ues 2x 2GB DDR 2 of 667mhz only. It will solve your problem.

  • Welcome to Super User! Can you edit you answer and explain why you are recommending this? – bertieb Mar 3 '19 at 20:24

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