Dell Optiplex 790 RAM ugrade

Question

I recently purchased  a Dell Optiplex 790 Desktop PC. Specs: i5 2400, 4 GB RAM (2 X 2GB DIMM's), can I upgrade the ram by installing 2 more 2GB DIMM's to make a total of  8 GB or do I have to install 2 X 4 GB to achieve 8 GB of RAM. Any help would be greatly appreciated.

Mike S.1 · Accepted Answer

If you have 4 DIMM slots you can do 4x2GB. If you have 2 DIMM slots you need to do 2x4GB.

Mike S.1 · Accepted Answer

No problem

adgrant72 · Answer

I tried installing 4 X 2Gb DIMM's but the computer does not boot up, just hangs on a black screen on boot up. Do i need to enable anything in the bios ?

Mike S.1 · Answer

Do you get any error lights on the computer?

laserman778 · Answer

Can you post the specifications of the original RAM and the RAM you just inserted? The specifications will be located on a label on the side of the stick. Similar to this: http://aphnetworks.com/review/ocz_platinum_pc3_12800_enhanced_bandwidth_2x1gb/006.JPG

-Brandon

adgrant72 · Answer

I think there was the  1 and 3 orange lights lit up on the fron of the box, but was not sure what this is / was.

Mike S.1 · Answer

Try 1 stick at a time and see if you have 1 had bad stick.

Mike S.1 · Answer

Did you start adding one by one because that also would show a bad DIMM slot

adgrant72 · Answer

Both sets of 2 X 2Gb DIMM's work when they are installed seperately, but not when all 4 are installed together.

adgrant72 · Answer

Ok, will try adding one at a time when I get home from work.....I think your right, might be a MB slot problem Thank, will post my findings later tonight

adgrant72 · Answer

Thanks for the help.

Ended up putting one DIMM in at a time and booting inbetween..and managed to get all 4 X 2GB DIMM's working.

Not exactly sure why it didnt work originally...but working now.

Thanks again for the help.

busshpctr · Answer

I have installed 8 gb ram to try to double my ram into a dell optiplex 790.  It will only say it recognizes the original 3.whatever it had when I had 4 gb.  What did I do Wrong

stargait2000 · Answer

Chances are you're only using a 32bit operating system. It will only recognize slightly over 3Gb RAM. To use more, you'd have to upgrade to a 64bit O/S.

Antilope · Answer

I have a Dell Optiplex 790 Desktop. It has bios 790-A18 installed. I am running Windows 10 Pro x64 on it with a 3TB Western Digital hard disk on UEFI bios. The processor is an Intel I5-2400 and it has at total of 10gb of ram memory.

It came with 2 x 2gb ram and I added an additional 8 gb of ram. Here is the part number of the Kingston 4gb dimms that I added:

Kingston ValueRAM 4GB 1333MHz DDR3 Non-ECC CL9 DIMM SR x 8 Desktop Memory - part number: KVR13N9S8/4R

UPDATE: Sep 5, 2015

I added an additional 8gb of ram (2x4gb) and removed the two 2gb ram dimms. The 4gb ram dimms were the following part number:

Kingston Technology 4GB 1333MHz DDR3 (KAC-VR313S/4G). They are in Dimm sockets 2 &4.

The system now has a total of 16gb (4 x 4gb) of ram.

Locked Topics – Desktops General

Was this post helpful?