InfoGuy

First, it appears that 2933 MHz DDR4 R-DIMM is recommended for your Mac. Initially, when you had 112 GB, your Mac identified 4 sticks of 2933 MHz DDR4 R-DIMM, but with 240 GB, it's recognizing 0 sticks of 2933 MHz DDR4 R-DIMM.

Second, it's a 6-channel configuration. Just balancing equal amounts of total memory for slots 1-6 and 7-12 may lead to memory problems. Optimally, you want to match your RAM with the respective slots to reduce the possibility of errors, but even that is no guarantee. Match as best you can, the RAM's capacity, speed, timings, voltage and manufacturer.

The link from Colmike9 indicates the 32GB sticks should be in the odd slots.

When done, you may want to run a RAM test.

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