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May 1st, 2019 07:00
R720 Memory Upgrade
Hello,
I want to upgrade ram in my 3 dell power edge r720
It work now with 2*8GB + 2* 16 GB
in A1 A2 B1 B2
I want to add 2* 16 GB
So can i install them in A1,A2,A3 B1 B2 B3
All memory are DDR3 1600 (PC3 12800)
Thank you for help
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Daniel My
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May 1st, 2019 10:00
Hello
It might work, but it would not be a supported configuration. All of the memory in 1,2,3,4 should be the same. The R720 should have the flexible memory feature, this allows unsupported/non-optimal configurations that are supported by the memory controller, so the configuration will likely work.
When memory is mixed the way you suggest it will switch to single channel mode. The R720 is quad-channel, so 1,2,3,4 is a group of interleaved memory banks spread across four channels. If you mix memory sizes within slots 1,2,3,4 it should switch to single channel mode. You would lose the performance benefit of interleaving.
The memory groupings are color coded:
1,2,3,4 - white
5,6,7,8 - black
9,10,11,12 - green
http://www.dell.com/poweredgemanuals/
Thanks