Richard Bonine, Jr. wrote:
Are GPU's pretty standardized size wise? What would a setup like the one in the milk crate cost. I am pretty intrigued by crypto coin mining concept.
The GPUs are all about the same size. They're about a foot long and 1.5" wide. AMD R9 280X GPUs are currently about $500 each. (They've doubled in price recently.) You need a motherboard with PCI Express 3.0 16x slots. However many slots are in the motherboard is the max number of GPUs you can install. The power supply needs to be about 150W + (300W * number of GPUs). The CPU and RAM on the motherboard are relatively unimportant, so just a cheap energy efficient CPU with a couple GB of ram.
So for example, a basic system ...
Motherboard w/ 3 PCI Express 3.0 16x slots ($120): http://www.newegg.com/Pro...6813157460
RAM 2GB ($30):http://www.newegg.com/Pro...6820139873
Then, the specific power supply depends upon how many GPUs ...
500W power supply / 1 GPU ($45):http://www.newegg.com/Pro...6817438016
750W power supply / 2 GPUs ($80):http://www.newegg.com/Pro...6817438007
1050W power supply / 3 GPUs ($100):http://www.newegg.com/Pro...6817121070
Then the GPU ... the R9 280X is a good balance of energy efficiency, price, and processing power. There are a bunch of different brands selling the same type of card. Some are better than others. Here's a cheap one. I don't know how good it is, but it is probably fine ...
PCI Express 3.0 16x Riser Cable - 1 for each GPU ($15 each):http://www.amazon.com/PCI...B008BZBFTG
So basically, if I've done my math correct, given the above:
- 1 GPU system would cost about $770
- 2 GPU system would cost about $1310
- 3 GPU system would cost about $1820
Perhaps it can be done cheaper. Those are just example components I picked. I think that's pretty accurate though.
Then you'll need some sort of hard drive w/ perhaps 64GB of space (scavenge one from an old computer, or buy a new one for $20, or whatever), a mouse, keyboard, and monitor (just borrow those from another computer - they aren't really required after it is configured, since you can remote in through the LAN using Remote Desktop), and find a copy of Windows 7 or 8 (put it on a bootable USB drive to install).
Out of the box, each of those systems should do (approximately):
- 1 GPU - 700 khash/s
- 2 GPU - 1400 khash/s
- 3 GPU - 2100 khash/s
And may be able to be overclocked higher assuming you can keep them cool enough. You'll probably need a big fan to assist w/ cooling the entire thing - and then back to the original posts above, you'll also need a chassis to hold it. Either a milk crate or something like one of those.http://coinwarz.com
has a calculator to figure out profitability. The type of hashing would be Scrypt, not SHA-256.
Also, one thing to realize is that the estimates at CoinWarz are based on the current price of BTC, which fluctuates, and is currently low. If in the future the price goes up, then whatever you've held from mining would go up as well. The price of BTC when actually converting to USD is what's ultimately accurate, not the estimates.