Dell T5820 upgrade - 2666Mhz(21300) or 2933Mhz(23400) RDIMM

Hi, new to forum.

Ive just purchased a Precision 5820 Tower and It has It has 16Mb of 2933Mhz RDIMM.

When searching the web for upgrade advice I found GPCG and a great video to watch.

On the [url=https://www.greenpcgamers.com/technology/precision-t5820-gaming-computer/] info [/url] page there is a statement(below) about only using PC4-21300 modules for memory.

"It’s very important to use 21300 modules because they will run at the max speed supported by the system board and processor(s)."

I'm wondering what happens when using PC4-23400 modules instead.

Anybody know what the problem is?

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  • sorry, tried to make a one word hyperlink but it didnt work.

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      • uco73
      • uco73
      • 2 wk ago
      • Reported - view

      Quint Cameron which CPU you have?

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    • uco73 I have the XEON W2133, 3.6Ghz, 6-core

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      • uco73
      • uco73
      • 2 wk ago
      • 1
      • Reported - view

      Your MBO support DDR4 1600/1866/2133/2400/2666 up to 512GB and 

      2933 up to 256GB. Maybe you have more than 256GB.

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      • WENDIGO
      • Ankou
      • 2 wk ago
      • Reported - view

      uco73 What is MBO?

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      • uco73
      • uco73
      • 2 wk ago
      • Reported - view

      Brian C.  MBO is motherboard.

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    • uco73 i currently have 16gb(i said mb above sry) and don't really expect to ever exceed 64gb but that does answer my question, Thank You.

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      • uco73
      • uco73
      • 2 wk ago
      • Reported - view

      Quint Cameron can you add some photos of your memory here?

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  • Quint Cameron Your memory clock speed will be capped by your processor.  According to Intel, you are capped at 2666 AKA 2666V Modules.

    https://ark.intel.com/content/www/us/en/ark/products/125040/intel-xeon-w-2133-processor-8-25m-cache-3-60-ghz.html

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  • Update - the Precision 5820 wasn't to be delivered until April 20th and while browsing the Dell site last week a deal presented itself for a XPS-8930 w an i9-9900k cpu and a GTX 2080Super vcard for the same price as the Precision-5820. Dell let me cancel the 5820 and order the 8930. The 8930 comes with 32G of 2666mhz ram.

    As i am not one for overclocking and didn't see me adding more than 64G ram or anymore than 2 vcards to the 5820 anyway, i see the 8930 as a better pc for my gaming needs.

    Also it's supposedly coming this week.

    Thanks again for your responses.

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  • 2666 is actually slow for the XPS setup.

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  • With an ATX systemboard you can normally overlock your memory.  However, I'm not sure if the XPS system will allow it.  I currently have a custom gaming unit running with an I9-9900K and 32GB of 4266Mhz memory installed.  It's running stable.

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