Correct Memory Configuration for R430

Question

Hello, I have a Dell R430 with dual processor. It currently has 4x32GB PC4-2133 memory modules working (128GB). From a decommissioned server, I have available 8x16GB PC4-2400 which I'd like to add to this server to total 256GB but I'm confused with where to put each module to make the configuration valid. I've read what seem like conflicting information about how many modules can be used for CPU1 and for CPU2. Could someone kindly clarify where each module should go given the above configuration?  Do I need to put the 3x32GB in B1-B4 and the 8x16GB in A1-A8? This seems to be what this doc indicates? https://qrl.dell.com/Files/en-us/Html/Manuals/R430/System%20memory=GUID-D04A3623-2BA6-4C99-BBAD-298891A1BEBF=1=en-us=.html  I understand the memory speed will be lowered to 2133 as it is the lowest speed out of both. Thanks in advance!

DELL-Chris H · Answer

Gavin2812,

Would you confirm the part number for the dimms, it may be a compatibility issue?

If you go to page 82 here you can find the guidelines for the dimm population, as well as table 40 on page 85.

Let me know if this helps.

gavin2812 · Answer

Hi, thanks for your reply.

This is what I meant about conflicting info.

The page you referenced (page 82) says this:

In a dual-processor configuration, the memory configuration for each processor should be identical. For example, if you populate socket A1 for processor 1, then populate socket B1 for processor 2, and so on. ● Memory modules of different capacities can be mixed provided other memory population rules are followed (for example, 4 GB and 8 GB memory modules can be mixed).

But the page I referenced (also Dell) says this:

Memory channels are organized as follows:

Processor 1	channel 0: memory sockets A1 and A5 channel 1: memory sockets A2 and A6 channel 2: memory sockets A3 and A7 channel 3: memory sockets A4 and A8
Processor 2	channel 0: memory sockets B1 channel 1: memory sockets B2 channel 2: memory sockets B3 channel 3: memory sockets B4

So based on this I'm assuming I can do this?

A1 - 32GB
B1 - 32GB
A2 - 32GB
B2 - 32GB
A3 - 16GB
B3 - 16GB
A4 - 16GB
B4 - 16GB

Does this mean I cannot use A5, A6, A7 or A8?

Does processor 2 really have less sockets than Processor 1?

DELL-Young E · Answer

Hi,

this is how it should be done, if I could add:

https://dell.to/36Ct2iq

Table 2. Memory configurations—two processors

SYSTEM CAPACITY (IN GB)DIMM SIZE (IN GB)NUMBER OF DIMMSDIMM RANK, ORGANIZATION, AND FREQUENCYDIMM SLOT POPULATION842

1R, x8, 2400 MT/s,

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

A1, B11644

1R, x8, 2400 MT/s,

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

A1, A2, B1, B2

82

1R, x8, 2400 MT/s,

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

A1, B12446

1R, x8, 2400 MT/s,

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

A1, A2, A3, B1, B2, B3

3248

1R, x8, 2400 MT/s,

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

A1, A2, A3, A4, B1, B2, B3, B4

84

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, A2, B1, B2162

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, B148412

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3, B486

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, A2, A3, B1, B2, B3

6488

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, A2, A3, A4, B1, B2, B3, B4

164

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, A2, B1, B2322

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, B196812

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, A2, A3, A4, A5, A6,A7,A8, B1, B2, B3, B4

166

2R, x8, 2400 MT/s,

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

A1, A2, A3, B1, B2, B3

128168

2R, x4, 2400 MT/s,

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s

A1, A2, A3, A4, B1, B2, B3, B4

324

2R, x4, 2400 MT/s,

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s

A1, A2, B1, B216016 and 812

2R, x4, 2400 MT/s,

2R, x8, 2400 MT/s,

2R, x4, 2133 MT/s,

2R, x8, 2133 MT/s,

2R, x4, 1866 MT/s

2R, x8, 1866 MT/s

A1, A2, A3, A4, A5, A6,A7,A8, B1, B2, B3, B4

NOTE: 16 GB DIMMs must be installed in slots numbered A1, A2, A3, A4, B1, B2, B3, and B4 and 8 GB DIMMs must be installed in slots A5, A6, A7, and A8.

1921612

2R, x4, 2400 MT/s,

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s

A1, A2, A3, A4, A5, A6,A7,A8, B1, B2, B3, B4

326

2R, x4, 2400 MT/s

2R, x4, 2133 MT/s

2R, x4, 1866 MT/s

A1, A2, A3, B1, B2, B3

256328

2R, x4, 2400 MT/s

2R, x4, 2133 MT/s

2R, x4, 1866 MT/s

A1, A2, A3, A4, B1, B2, B3, B4

3843212

2R, x4, 2400 MT/s

2R, x4, 2133 MT/s

2R, x4, 1866 MT/s

A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3, B4

DELL-Shine K · Answer

R430 have 8 DIMM slots for CPU1 and 4 DIMM slots for CPU2. You can try populating 32GB DIMM's on A1,A2,B1 and B2 and remaining slots 16GB DIMM's.

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