Through the years I have collected a bunch of computers of the PC class. Some of them I bought from new, getting the fastest I could afford when it was time for a new one. Some of them I bought second hand because I needed one in special situations. And some of them just ended up with me, when they were abandoned by other people.

Number	CPU	Clock Rate	Cores	Threads	RAM	Year	OS	Status
#6	Ryzen 9 5950X	4 GHz	16	32	32GiB	2022	Win 11 24H2 dual boot with: Q4OS 5.7 64bit	Desktop
#5	Intel Core i5-10310U	3.5 GHz	4	8	8 GiB	2020	Win 11 24H2	Laptop
#4	Intel Core i7 4820K	4.7 GHz	4	8	16 GiB	2013	Q4OS 5.7 64bit	Desktop
#3	Intel Core i5 4570	3.2 GHz	4	4	8 GiB	2014	Win 10 64bit	Desktop
#2	Intel Pentium 4 HT	3 GHz	1	2	3 GiB	2005	Q4OS 5.7 64bit	Desktop
#1	Intel Celeron M 440	1.8 GHz	1	1	2 GB	2007	Q4OS 5.7 32bit	Laptop

For those computers that no longer can support Windows 10 or 11, I have chosen to use the Q4OS Linux distribution. It is Debian based and fairly light weight, so it can run on older computers. More info here. Currently I don’t have much day to day experience using it for regular work, but I have succeeded making it run on all of the above mentioned PCs and have been able to install compilers and libraries, so I could compile and try my programs on different platforms. It will be noted in my individual posts, when the the different PCs and OSs are in use.

I am using a StarTech.com 4 port KVM SV431DPUA switch to switch between the different computers. This switch has DisplayPort inputs and outputs, USB switching and audio switching. It is a bit old, but still works fine. I have found that support for DisplayPort connections is not very widespread, mostly supported by HP hardware. I ended up with using that because I found the KVM switch for free; my main PC #6 has miniDPort outputs; and the HP screen I have supports it. I would have gone with HDMI if I wanted to splurge the money for a new setup from the bottom up.

In particular adapters from HDMI output on a PC to DPort input on the switch are expensive, it is not enough with just a cable adapter.