I am thinking of buying a computer to use only for running Tor relays from England in the United Kingdom.
I am writing to ask for advice on which details of the machine make a difference to the effectiveness of the machine when used only for this purpose.
I would be installing Ubuntu or another Linux distro on the machine, but am only asking about hardware in this question, assuming that the choice of distro is not related to the choice of hardware. If that assumption is incorrect, please let me know.
The internet connection is via a BT Home Hub, and the relevant speeds BT have told me about are 55 Mbps to download and 10 Mbps to upload.
I am considering buying a Lenovo Thinkcentre M93. They are office desktop machines which would cost in the region of £100 to £200 secondhand, and have an Intel Core i3, i5, or i7 processor. I would use the passmark.com website to compare the power of the CPUs.
I would guess that the power of the processor will matter, but have no idea how much difference it would make to have a passmark rating of 7000 rather than 4000.
Is the number of physical or logical cores important, or the passmark score per physical or logical core, rather than the total, if a Tor relay only uses one physical or logical core, as I have seen mentioned somewhere?
Would the the amount of RAM will matter up to a point? I do not know if the relevant point is 4GB, 8GB, or 16GB.
Would the type of ethernet card or connection matter?
Would the amount and type of storage matter, HDD or SSD? I would guess that anything over 80GB would be fine, and more would not be better over that level, but again am not sure. I would presume that SSD is better than HDD, but again am not sure.
The machine would be connected by cable to the BT Home Hub. Does the type of cable matter, category 5e, 6, or 6a? (These are the category labels in the UK).
Am I thinking along reasonable lines, or should I be looking at gaming machines rather than business ones, or a different family of CPUs than Intel Core?
With thanks in advance for comments and help based on knowledge and experience.