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william kk
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November 11th, 2020 08:00
Poweredge R720 ram speed during POST
Hi all,
I have recently procured a used Poweredge R720 with 8x8GB hynix original 1Rx4 pc3-14900 ram installed, everything went fine, the system boot up and I have managed to do whatever I need to do.
However, I noticed the ram speed during POST was set as 800mhz and after some research, the dual CPU installed (e5 2643 v2) should support upto 1866mhz. The ram was origianlly installed on A1,2,3,4 and B1,2,3,4, changing to different setup did not change the speed during POST.
I have also swap it to 8x16GB samsung 2Rx4 PC3L - 12800 ram but unfortunately that didn't make any different.
I wonder anyone can guide me to the right direction please.
DELL-Charles R
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Posted November 11th, 2020 12:00
Hello william kk,
I'm sorry to see it's having an issue with memory.
Have you confirmed BIOS and iDRAC firmware up to date?
Be sure to follow memory guidelines:
Page 40 : https://dl.dell.com/topicspdf/poweredge-r720_owners-manual_en-us.pdf
Test this:
Try with 1 DIMM per processor, check results, Add 1 more DIMM per proc., check results, Add the remaining DIMMs and check results.
Can you post me a picture where it states 800Mhz memory speed?
If it does not improve we may have to get a look at the hardware SupportAssist report.
Please let me know how it goes.
DELL-Charles R
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Dell Technologies | Enterprise Support Services
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Posted November 11th, 2020 13:00
Hello william kk,
That is great to see. I'm glad you were able to get it resolved.
DELL-Charles R
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell
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william kk
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Posted November 11th, 2020 13:00
Many thanks and much appreciated for your reply.
I figured it out the reason why the ram speed was limited, it is due to the previous owner has set the bios -> system profile as custom which he then selected system reliability over performance.
I reset that option and the system now recognise the memory speed correctly.
Many thanks again for your support.