T7910 Precision memory: HYNIX DDR4-2132/PC4-17000 DDR4 compatible with MICRON DDR4-3200?

Hi,

I need help upgrading my Dell T7910 Precision Workstation memory from 64GB to 128GB: is Hynix DDR4-2132/PC4-17000 DDR4 SDRAM RDIMM memory compatible with Micron DDR4-3200 RDIMM memory

I have eight (8) Hynix DDR4-2132 / PC4-17000 DDR4 SDRAM RDIMM EEC 1066 MHz memory sticks for a total of 64 GB. Product number: HMA41GR7MFR8N-TF. My T7910 has sixteen memory slots with eight (8) being free.

I run Windows 10 Professional. My CPU details are appended to this post.

I planned to add another  eight (8) Hynix HMA41GR7MFR8N-TF. Unfortunately, all the new ones I found were counterfeit and I did not want refurbished sticks.

A Micron/Crucial memory scan suggests I can add the following memory to my Hynix memory:

1. Micron 8GB DDR4-3200 RDIMM 1Rx8 CL22 (MTA9ASF1G72PZ-3G2R) - DDR4-3200MT/s • 8GB Module Capacity • 8Gb Die Density • RDIMM • 1 Rank x 8 • PC4-25600 • CL=22 • Ext Timing 22-22-22 • 1.2V • ECC • Single Pack. Price: $47.49 each, $380 for eight (8), that is, 64GB.
2. Micron 16GB DDR4-3200 RDIMM 2Rx8 CL22 (MTA18ASF2G72PDZ-3G2R). DDR4-3200MT/s • 16GB Module Capacity • 8Gb Die Density • RDIMM • 2 Rank x 8 • PC4-25600 • CL=22 • Ext Timing 22-22-22 • 1.2V • ECC • Single Pack  Price: $71.41, $286 for four (4), that is 64GB.
3. Micron 16GB DDR4-3200 RDIMM 2Rx8 CL22 (MTA18ASF2G72PDZ-3G2R) DDR4-3200MT/s • 16GB Module Capacity • 8Gb Die Density • RDIMM • 2 Rank x 8 • PC4-25600 • CL=22 • Ext Timing 22-22-22 • 1.2V • ECC • Single Pack Price: $71.41 $286 for four (4), that is 64GB.
4. Micron 32GB DDR4-3200 RDIMM 2Rx4 CL22 (MTA36ASF4G72PZ-3G2R) - DDR4-3200MT/s • 32GB Module Capacity • 8Gb Die Density • RDIMM • 2 Rank x 4 • PC4-25600 • CL=22 • Ext Timing 22-22-22 • 1.2V • ECC • Single Pack Price: $132.24, $264 for two (2), that is 64GB.

While Crucial lists other Micron memory for my T7910, they do not seem to be available at the sellers it lists on its site. I imagine they are out of stock or no longer produced.

Clearly it would be cheaper to buy two 32GB ($264) sticks than eight (8) 8GB sticks ($380). It would also leave some memory slots free for future memory upgrades.

My questions are:

1. Are these Micron memory sticks compatible with my Hynix ones?
2. If they are compatible can I install
3. 1. Two Micron 32GB sticks (or four 16GB ones) or
   2. am I limited to the 8GB Micron sticks because of compatibility issues?
4. If the Micron memory sticks are incompatible with my Hynix ones, should I
5. 1. Discard them and buy four (4) Micron 32GB sticks (Crucial does not list any Micron sticks beyond 32GB that are available)?
   2. Look at memory makers other than Micron? Any suggestions would be gratefully received.
6. I would also appreciate any suggestions of Micron memory stick sellers other than Crucial

My thanks in advance for your comments and advice

My T7910 CPU 

CPU 0                                                                         CPU 1

Intel(R) Xeon(R) CPU E5-2637 v3 3.50GHz            Intel(R) Xeon(R) CPU E5-2637 v3 3.50GHz

CPU Technology - 22 NM                                         CPU Technology - 22 NM

Stepping - R2                                                              Stepping – R2

Core/Threads - 4/8                                                    Core/Threads - 4/8

SSPEC SR202                                                            SSPEC SR202

uCU 44                                                                        uCU 44

Cache 4x32 + 4x32 + 4x256 + 15M                        Cache 4x32 + 4x32 + 4x256 + 15M