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Ram upgrade on Dell Optiplex 780

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#1 Sylveon Fetish

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Posted 28 October 2016 - 09:43 AM

Does anybody know what kind of ram (DDR3, DDR2, etc) a Dell Optiplex 780 with a service tag 443RNM1 has. I am looking to buy some ram sticks for upgrading my Ram. Thanks

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#2 SleepyDude


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Posted 28 October 2016 - 10:27 AM





Original configuration:


317-3555 : 4GB,Non-ECC,1333MHz DDR3,2X2GB ,Dell OptiPlex 580

DUAL IN-LINE MEMORY MODULE, 2G, 1333, 128X64, 8, 240, 2RX8




I found contradictory information on Dell documents related to the max ram supported!

16GB: http://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-780_service%20manual3_en-us.pdf


8GB: http://www.dell.com/downloads/global/products/optix/en/optiplex_780_tech_guidebook_en.pdf

Edited by SleepyDude, 28 October 2016 - 10:37 AM.

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#3 Sylveon Fetish

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Posted 28 October 2016 - 10:44 AM

Thank you

#4 dc3


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Posted 29 October 2016 - 10:57 AM

Crucial reports that this computer uses DDR3 with a maximum RAM of 16GB (4GB per slot).


Your computer is capable of running the RAM in dual channel.  This increases the throughput speed, this makes the RAM almost twice as fast.  In order to run in dual channel you must use matched pairs for all four DIMM slots.


Please do the following so we can find what RAM you currently have installed.  Once I know what is there I can provide information for purchasing RAM that will match what you have installed.


Please download and install Speccy to provide us with information about your computer.  Clicking on this link will automatically initiate the download.

The one piece of information the Speccy will not provide is the make and model of your PSU.  If you know what it is please post this along with the Speccy link which will be generated.

When Speccy opens you will see a screen similar to the one below.

Click on File which is outlined in red in the screen above, and then click on Publish Snapshot.
The following screen will appear, click on Yes.
The following screen will appear, click on Copy to Clipboard.
In your next post right click inside the Reply to Topic box, then click on Paste.  This will load a link to the Speccy log.

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