Z840 5 beeps with 64GB (8x 8GB) DDR4-2133P 1Rx4 Reg ECC (p/n 752368-581)

[Zogpy_CG]

@DGroves

Thanks a lot for your reply, I have tested 8 Identical Micron (MTA36ASF2G72PZ-2G3B1QG) 16GB 2Rx4 DDR4-2400T modules, the system boots fine only with the following configurations:

If CPU1 channel 3 is populated I get 5 beeps:

If the 2nd bank of Channel 1 for both processors is populated with 16GB DDR4-2133P the system boots fine too

[DGroves]

you either have a bad dimm socket or a bad memory controller on cpu 1

or cpu 1 socket pins are not all making contact with cpu

last, are cpu's retail/release or engineering ES/QS samples? non retail cpu's can have several issues

[Zogpy_CG]

@DGroves

Thanks for your reply

-I have tested a matched pair of E5-2680V4 (2016 Batch) with the same memory 16GB 2Rx4 DDR4 2400T,

thanks to God no more beeps but the overall (After effects rendering performance) is a little bit slower.

The only difference is that the matched pair are 27 weeks older (2nd week of 2016) and the FPO initial letter J instead of L which I believe stands for the manufacturing country/site is that correct?!

J: USA

L: Malaysia

- I had the same doubt until I tested CPU1 in a Dell T7810 workstation it works fine in quad channel mode with 2400T modules (no beeps)

- All the processors I have tested are retail/release 

[DGroves]

you cannot mix Low power dimms and std power dimms and the z820/z840 support both module types so make sure that all modules are one or the other

https://blog.memory4less.com/2017/01/31/low-voltage-ram-vs-standard-ram-modules-what-is-the-differen...

4GB DDR4-2133 ECC Registered RAM

8GB DDR4-2133 ECC Registered RAM

16GB DDR4-2133 ECC Registered RAM

32GB DDR4-2133 ECC Load Reduced (LR) RAM

You cannot intermix LR DIMMs with Registered DIMMs. The system will not work.

[Zogpy_CG]

Thanks for your reply

MTA36ASF2G72PZ-2G3B1QG are RDIMMs, I didn't mix modules in the latest test with the matched pair of Xeons only identical DDR4-2400T were used

any clue about the FPO first letter L or J ?!

[itsmyname]

@Zogpy_CG -- any clue about the FPO first letter L or J ?!

Posted ‎01-18-2022 01:35 AM by @DGroves

... the FPO initial letter J instead of L, which I believe stands for the manufacturing country/site

is that correct?!

J: USA

L: Malaysia