Hello

M393B2G70DB0-CMA

Yes, this is a validated memory module for the T620. We have it listed under several part numbers, 12C23 is one of the part numbers.

M393B2G70QH0

I was unable to locate this model number in our part database.

if I have the 1st part number already used in my server, will I be able to use the 2nd one as well?

The first module does not appear to be validated, so I can't say for sure it will work. From your statement it sounds like it is working without issue for you.

By just skimming the specifications I don't see a reason they cannot be used together. Your low voltage memory will operate at 1.5v when mixed with 1.5v memory, and they will negotiate down to the lowest common frequency.

You should avoid mixing memory within a memory grouping(1-4, 5-8, 9-12). The memory you have is similar enough that you can probably mix it, but it should be avoided if possible.

Thanks

M393B2G70QH0-YK0

That module is not validated.

could you please advise where to find the approved memory list from Dell website, because could find that but not from Dell website.

We do not maintain public part lists of compatible memory. You can purchase validated memory directly from us or an authorized reseller. There is nothing proprietary about the memory used in our servers. Some memory vendors publish information about modules that have been validated on our servers.

Thanks