I'm sure the gamers will bash this build since it's a mining rig, but I figured I'd let the "haters hate" and share this build anyways for anyone considering a mining rig project!
FYI - This is my first mining rig build.
I was lucky enough to snag the Corsair GeForce GTX 1080 Ti's from Corsair.com for $50 under MSRP with no tax and $4.88 on shipping per order of 2. Stumbling upon this deal was literally the deciding factor for me to take on this project since the GPU market at the moment makes grabbing several GPUs nearly impossible (yes, I realize that I am now part of that "problem").
I was quite shocked how easy this build was to get up and running after hearing nightmares of people trying to force "non-mining" motherboards to recognize more than 2 GPU's. Assembly and startup was more or less plug and play. After a few BIOS adjustments (there are plenty of guides online), the rig was up and mining in less than an hour after hitting the power on switch for the first time! I attribute this success to selecting a commonly used mining motherboard that has plenty of online material documenting its use for this purpose.
One difficulty I encountered:
The frame I purchased (Veddha 8 gpu) only has slots for 7 fans. Since my water-cooled GPUs came stock with their own radiators and mounted fans, I needed to rig up some brackets to mount the 8th fan/rad below the frame's default spot for the 7 fan array (see pictures). The brackets were fabricated from bent aluminum with some drilled holes. Luckily, the frame kit came with enough spare hardware so I didn't need to source any extra screws/mounting hardware.
I'm using the Linux based SimpleMining Operating System (SMOS - https://simplemining.net/) flashed onto a USB stick - no HDD or SSD involved in this build (saved a pinch of $!). For a first time miner, SMOS is rather intuitive. I'm mining at a power conscious overclock (+200 Core clock / +175 Mem clock / 175W power limit) with GPU fans set to 50% and radiator fans set to 60%. The rig measures around 1750W at the wall under load. The cards rarely breach 40 degrees celcius (currently ~70 degrees fahrenheit ambient in my house) and are pumping out around 750 Sols/s on each card or 6,000 Sols/s for the whole rig with about 4.2Sols/watt - rather efficient given how power hungry these 1080 Ti's are!
Return on Investment (ROI)
On www.whattomine.com at the time of building this rig, the break even point is about 150 days. Realistically, I'll be HAPPY to hit ROI by July-August just in time to scoop some hardware for another rig when the GTX 1100 series comes out. Honestly though, if I break even in a year I'll be satisfied.
Fingers crossed the market stabilizes and improves!
I want to build my own mining rig!
The mining community has become rather "open door" in terms of available information over the most recent years. If you're considering building a rig and have the capital to do so, don't be shy. There are plenty of support outlets if you run into trouble (google Voskcoin - https://www.youtube.com/channel/UCT44w6854K62cSiwA1aiXfw or peruse the forums on www.BitCoinTalk.org). Also, be persistent on the GPU hunt. Close to/at MSRP priced card deals are still out there daily. I've managed to score a handful more already for my next build.
Thank you for taking the time to view and read about my build!