Even after building a smallish mining rig you could easily be running 500 watts. The computer stand alone will use another 100 - 200 watts depending on your system configuration. Each graphics card will use on average about 200 watts. What are the Cons of GPU based bitcoin mining?Energy usage is the big one. If you are looking to get int bitcoin but want to protect yourself in case bitcoin tanks, GPUs are the way to go. Using riser cables some guys have filled their system with 6 graphics cards, and have pushed 4+ Ghps out of their computers. Besides what better excuse to upgrade to that monster graphics card setup than bitcoin? For people wanting to get even more mining capacity out of their rigs, they can install multiple graphics cards. Since its a graphics card is Bitcoin tanks, it still has value for gaming and other uses. These cards can also be picked up for around $200 - $350 each used on ebay. Cards like the 6990 are said to generate 700+ Mhps. What are the Pros of GPU based bitcoing mining?Buying a large graphics card such as an HD 7950, 6990, or other ATI / AMD based graphics cards, can make an impressive amount of bitcoin. ![]() However the companies that make those larger miners have been having trouble filling orders, making some believe they have problems actually making a working miner. The larger ASIC miners that can do 50+ Ghps, could make the USB miners obsolete. The second Con is hardware in the bitcoin world rapidly depreciates as the next best thing comes out. Their price on ebay drops to almost nothing. Now you have 100 of these devices that were designed to mine something that no longer exists. Then all the sudden the price of bitcoin drops, or even worse it crashes( government shuts it down, Big investors dump their shares ). Lets say you bit the bullet and bought 100 of these devices. ![]() What are the Cons of USB based ASIC Block Erupters for bitcoin mining?This answer has to do with faith of bitcoin as a currency. They are the perfect device for computers of al shapes and sizes since they dont' tax your CPU. If you are willing to buy 50 of them in bulk, and wait a few weeks, you can get that price down to about $90 each. ![]() Retail you can easily pick them up for about $150 each. So if you were to max out your system, with say 125 of them, ( leaving spare ports for your keyboard and mouse ) you could theoretically run 41.625 Ghps, yielding you about $75 per day. You computer can handle upt o 127 USB devices at once. Then when you run out of USB slots, you buy large USB hubs and fill those as well. If you wish to scale up its as simple as buying more sticks, and filling every USB slot on your machine. They are energy efficient using about 3 - 5 watts each, and they don't tax your hardware, meaning you can continue to do real work on your computer while they are mining. What are the Pros of USB based ASIC Block Erupters for bitcoin mining?These little devices have only been around for about 2 months. Should I build a GPU based system with several graphics cards, or should I just buy a bunch of USB ASIC Block Erupters? The Answer lies in how commited you want to be to mining bitcoin, and how much faith you have in this crypto currency. When you first start getting into the bitcoin mining business, you have two choices to make. GPU miners vs USB ASIC Miners for BitcoinPosted on by Paul White
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