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I still don’t really know what you mean. How a document looks like depends on you. I’ve got very many fonts available, much more than average Microsoft Office user has. And it’s easier to use LibreOffice from my point of view, because it emphasizes structure. It looks much cleaner by default than MS Word. The only thing MS Word is better in is typesetting. LibreOffice simply fails to place letters properly.
Documents produced by office suites are not really good for publications. They are very annoying to handle, no matter if it’s MS Office or Libre. The cheapest option to have something professional is LaTeX.
I recently removed my 25Gbps PCIe dual port cards from my 2 servers because they were using 20W more. My entire rack including 2 UniFi PoE connections uses 90 W now (so 110 W just for having 25 Gpbs).
There is some heat from such cards, but usually it gets transported outside fine. The ones I bought did not come with a fan. I think you cannot operate them without one. The heat sinks get very hot.