2600K is my main computer and most of the time it runs Windows 10 although it can also BOOT to Ubuntu. It features an Intel 2600K CPU and has an Nvidia 1060 Graphics Card also (with capacity for another). In fact it has a 3rd slot and in the past I have dabbled with running three graphics cards and even two power supplies with this system but using that third slot was always problematic, particularly from a heat-perspective.
Phenom resides at my mum's house and is aptly named because it features an AMD Phenom X6 CPU. It runs Linux Ubuntu.
WO is an AMD Athlon 5200+ system. It usually uses a graphics card to crunch data but lacks one for now and is only number-crunching on the CPU. It is dual-boot, either Windows 7 or Ubuntu, but is using the latter right now.
Core2Quad is just that, an Intel Core2Quad-based computer running Ubuntu, it also has an Nvidia 1060 graphics Card. This computer is in my 'entertainment room' and is occasionally used to watch DVDs on a TV screen. It's hooked up to two old Sony amplifiers (one for the front and one for the rear) and nice-sounding speakers to provide quadraphonic audio (I much prefer this over small satelite speakers and a subwoofer rumbling away in the corner).
iccleBeast is not really that now, but the fundamentals of the system were in a smaller case than it is now. It has an Intel Core i5 CPU, 8GB RAM and presently a single Nvidia 1060 graphics card, although it originally had two graphics cards installed. It runs Ubuntu but also has Windows 10.
BIOSTAR is called that because it is built around a motherboard of that brand. It is running on Windows 7 with an AMD A4-5300 GPU and 8GB of RAM.
G43T is called because of the model of the motherboard (which is from a Dell Inspiron 560). It is running on Ubuntu with its Intel Core2Quad CPU. A quirk of this system is it needs to have a system fan (and keyboard) connected otherwise it wont boot (the BIOS has no option to ignore this).
Phenom2 is another AMD Phenom X6-based system running Ubuntu. It has 8GB of RAM; I found 4GB wasn't quite enough for comfortably loading the OS, BOINC and six work units.
P5NE is another Intel
Core2 Quad system running Ubuntu,
but also has Windows Vista as an
option. Potentially the P5NE-SLi
motherboard can have two
graphics cards installed in it,
but I have none spare for it.