I have found a mobo with an intel n3160 (4 cores, 1.6GHz) for 40€. Would it be a good idea to use it as a wifi router? I already have a spare 2gb ram stick at home for it and an msata ssd.
Here is a pic of it:
In my build I used a mini-pci express to pci-express daughter board. This is a PCI-express card that can house two mini-pci express cards, one on either side of the board. This allowed me to put two mini-pci express cards into my single pci express slot.
I had to do this at the time since no cards were available that did both 2.5ghz and 5ghz: it was either or. So I had to use two cards.
I would go for a card that uses ath10k, without a doubt. They work and they work well. I used a card from Compex. You don't want to just use any old consumer wifi card, as some of them don't support AP mode. Using a card designed for being an AP would be a wise choice.
If you want one of the higher power cards, you're going to need to get a separate card for each of 5ghz and 2.4 and house it in a dual slot adapter.
Have a look at what Compex have available as they have quite a few different cards, ranging from 2x2 to 4x4 and both wave 1 and wave 2. My 2.4Ghz card is a Compex 3x3 mimo and has been running for years...
EDIT: sorry - I didn't read properly. I see your suggested board is mini pci-e anyway, so you don't need the adapter card. I'd go with the Compex card I linked. It's an enterprise-grade AP card
Thank you for your suggestions. I'm not sure if I will buy the dual band card because it can't do VHT80+80. Maybe a solution could be using Compex WLE1216V5-20 and a usb wifi adapter for 2.4ghz band, or a usb to mini pcie adapter. Something like this would work with openwrt? By the way, is it possible to use compex modules in a Windows PC? I can't find any 4x4 client adapter. The only 3x3 I found is this one: https://www.aliexpress.com/item/32778371977.html