I just installed 5.8 in hda1 on the SSD. I can tell right away that the computer is a little bit faster, not blindingly fast, but it certainly boots faster by a few seconds.
Aside from that, i assumed that the hard drive was the only source of noise left in the computer, but it wasn't so. There was a high-pitched sound coming from the computer. After googling around for a while i found that sometimes the highest power saving states of the CPU can produce these noises. The solution? Set the maximum state as such: echo 2 > /sys/module/processor/parameters/max_cstate. When i did this there was a profound reduction in the offending noise, but there was still some left. I googled around some more and found that a screen that has not been set at its full brightness can also make noise. I set mine in full and, sure enough, another drastic reduction of noise. The only noise left is a faint crackling which can be heard clearly if i put my ear close to the computer. This one partially goes away if i do: nice yes > /dev/null. Is this also related to ACPI? I don't know, i'm sleepy.