ups VS pcm

You can build your own: https://github.com/mini-box/ups There's even a community building powerwall clones (diy powerwall)

There are some other options in that thread at varying levels of DIY, but some highlights include the mini power supplies and DC-DC converters from mini-box: https://www.mini-box.com/micro-UPS-load-sharing and Pololu has some high powered DC converters that you could use: https://www.pololu.com/category/133/step-up-step-down-voltage-regulators.

It seems like the hardware manual goes over setting up the parameters for each chemistry. I also managed to find a Linux configuration tool on GitHub.

I don't know how often it's a problem, but I work for a company doing software video encoding, and we always fill up all the dimm slots on servers to have as much bandwidth as possible, even if we have only really use maybe 1/4 of the RAM.

I'm not sure any of the standard Linux tools can show you memory bandwidth usage easily (maybe perf), I know we use Intel PCM (https://github.com/intel/pcm) and AMDuProfPCM (https://www.amd.com/en/developer/uprof.html)

The Intel PCM suite does what you seem to be describing w/o a kernel module, and it uses nicely abstracted MSR accesses so that its portable to any OS.

https://github.com/intel/pcm

Measure with pcm-pci / pcm-iio https://github.com/intel/pcm

For my purpose, I want 1. Enough, but not excessive lanes for GPU. For upcoming PCIe5 enabled GPUs (which may not even happen just yet), we don't know if they can saturate 16x. Would be nice if someone could run https://github.com/intel/pcm pcm-iio and measure. If it turns out that PCIe5 enabled GPUs aren't using more than 8x bandwidth, then X670E 8/8/4 mode makes sense, if you can saturate the remaining lanes with something else.