Robert, cubieboard5 (AKA Cubietruck Plus) has an A83T SoC, which only got multicore for kernel 4.18 (still not relased).
I made a 4.17 version with smp support backported and you can find it here (https://armv7.dev.centos.org/repodir/community-kernel-latest/kernel/4.17.6-200.el7/).
Also cubietruck plus may not have HDMI support yet (I got a patch from another user in #centos-arm and seems to be working).

Finally, the main thing about that board (about that SoC actually), is that SATA is not native, it is an integrated SATA-USB, so performance may be an issue.
Personally I love the BananaPi M2Ultra, 2G RAM, 4 Cores and native SATA. The only problem is that SATA support is not integrated yet in any kernel, so it needs external patches.

Pablo.

P.S: this is a blog post I made a few months ago https://blog.centos.org/2018/05/testing-armhfp-devices/ , BananaPi M3 is practically the same as Cubieboard5.
P.S 2: wrt any device with AllWinner SoC, you can check https://linux-sunxi.org/Linux_mainlining_effort to know what to expect.

has anyone here tried out the octa-core Cubieboard5?

Does Centos work with all those cores for better multitasking than the duo-core A20 boards?

One of my Cubieboard2 is dying and I CAN replace it with one of my test boards.  But my mail server does struggle with only 2 cores for all the virus scanning.  If I had more cores, I could lift the attachment limit, perhaps.

I just saw a deal on the Cubieboard5, cheaper than the Cubietruck.

Or info on any other quad board.

thanks

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