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January 25th, 2025 20:10
Question About Using 6 RAM Sticks in Dell Precision 5820 with Xeon W-2145
Hi everyone,
I’m currently using a Dell Precision 5820 Tower with a Xeon W-2145 processor and 64GB of RAM (4 sticks, 16GB each). I’m considering upgrading my system by adding 2 more 16GB RAM sticks, which would bring the total to 96GB across 6 sticks.
However, I have some concerns about how the system will handle this configuration:
- Has anyone here used a similar configuration (6 RAM sticks in quad-channel systems)? If so, how does it perform?
- Will it still utilize quad-channel mode for 4 sticks and switch the remaining 2 sticks to dual-channel?
- Or will it downgrade all sticks to dual-channel, affecting overall performance?
I primarily use this system for AI training and machine learning tasks, which are memory-intensive and rely heavily on maximizing RAM bandwidth and performance.
Any advice, experiences, or suggestions would be greatly appreciated!
Thanks in advance!
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Chino de Oro
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January 26th, 2025 09:44
Yes, 6 x 16GB sticks will work for you although it's not a support configuration. Don't have the exact same RAM for testing. So, borrowed 2 sticks from one system and tested on another system. Added 2 x 16GB of Samsung PC4-3200 ECC RAM to system with 4 x 16GB of PC4-2666 Micron RAM and was greeted with BIOS screen alerting amount of memory has changed. Check with CPU-Z and it indicated 96GB of memory runs in quad channel.
Hope this helps.
On another thought, a user have upgrade the 5820 with Noctua cooler + fans and it does not interfere with RAM slots. He posted a video on YT with all part numbers and test results. It was an excellent job.
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Chino de Oro
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January 26th, 2025 04:52
If using correct type of memory, it will work. Although, 6 RAM sticks is not a support memory configuration. Therefore, the behavior and performance will be varied. Have tested with 2667 MHz and 2933 MHz 6 sticks configurations. Users could tell improvement although no benchmark was performed.
To make thing simple, why not upgrade with 4 more sticks to match Dell validated 8 sticks configuration.
Ahn Nguyen
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January 26th, 2025 07:40
@Chino de Oro
Currently, I am using 4 Hynix 16GB 2Rx8 PC4-2666V-R HMA82GR7AFR8N-VK RAM modules. I’m planning to purchase two more of the same modules to expand my system to six RAM sticks.
The reason I didn’t install all 8 RAM sticks is that I upgraded my CPU cooler, which blocks the two RAM slots closest to the CPU.
I noticed Dell supports configurations with 6x32GB RAM, but I couldn’t find any reference to 6x16GB. I’m about 50% confident it will work, but I wanted to ask if anyone here has used 6x16GB to be sure before buying.
Ahn Nguyen
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January 28th, 2025 12:08
@Chino de Oro Thank you for testing and sharing this information, it’s incredibly helpful!
It’s great to hear that 6x16GB works, and that the system runs in quad-channel with 96GB.
SoNic 67
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January 28th, 2025 12:40
The system might report quad channel, and it will work in that mode... until you use the added portion of the memory.
Those added sticks will be accessed in dual channel only, cannot be physically made to work in a 4 channel.
Existing sticks will remain quad mode.
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