Best look up peoples antutu scores for a given gpu type as a guide. It will assist in understanding gaming performance.
There are other considerations too as Warhawk mentions.
Ideas on what it should include
- 2Gb Ram and ideally 16Gb or more onboard memory.
- If opting for a no name brand take care as there are usually some issues that appear, eg Wifi performance. Check users reviews on any box to assess Wifi erformance. Ideally box has an external antenna.
- at least 2 USB ports, the more the better. I use one USB port for an air mouse dongle
has HDMI audio bypass. This enables streaming of audio to a separate receiver.
I got a Beelink s812 and it works good generally, although I had an issue where it decided to not want to power up anymore. It seems ok now. Wifi performance is good, not great. Just works ok with Netflix. The smart Tv beside it has better wifi reception so the wifi signal is stronger.