Server/Mining Rig:
I built this custom desktop pc at the end of the 2017-2018 school year. Much like the scrapyard computer, it is built out of reused parts from computers I had previously built and also contains parts from ebay.
The purpose of this computer is to remain on constantly, and host servers for a couple video games my friends and I play. It also mines ethereum at around 47 megahash per second. You can view the mining performance here. At the June 2018 difficulty and price, it mines about $12/week without factoring in electricity costs.
Both of the graphics cards in this pc have been significantly overclocked with a memory boost of 550+ mhz.
Specs:
CPU: Intel i7-4790K (Unlocked - Overclockable)
CPU Cooler: Stock Intel Cooler
GPU: 2x Gigabyte Geforce GTX 1060 Windforce OC (Overclocked)
RAM: 8gb Kingston HyperX FURY 1600MHz DDR3
Motherboard: Gigabyte GA-Z97N-WIFI Mini ITX Motherboard (WIFI onboard)
Case: Old used NZXT case
Power Supply: Silverstone SFX 450W
Storage: Old used Western Digital 80gb hard drive
OS: Windows 10