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My brother wants to do bitcoin/lite coin mining. Would using 2 AMD video cards at the total price of $550 or a single card 290/290X, which would be better for mining. How long would it takes to mine one bitcoin?

Can you suggest video card(s) for a total of $550. The computer will be on 24/7 for a full year and will barely be touched. Also suggest a extremely reliable 60-140GB SSD... Everything else I already had...

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Single, If you paying for electricity haviing more than one GPU will double you costs for little performance benifit. SSD, you can go with a Kingston HyperX, Samsung 840 Pro or of you want extreme reliability Intel is your best bet. Mining bitcoins takes for FAKUN ever and if you even considering it (I would just stick to lite coins) it could take a year or more. If you get on a pool in lite coins you could make a lite coin in as little as a few days.

 

Edit: I should read the whole question before typing...

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I wouldn't even worry about keeping the wallet on the computers SSD. Make weekly backups of the wallet to your other computers or flash drives in order to help reduce the risk of loss. Just encrypt your wallet and you will be fine. IF YOU ARE EVEN MORE WORRIED, encrypt the folder you put it in with true crypt or something. And you should do lite coin and join a pool. But in my experience, unless you have free electricity, it will not really make you too much money, its more of a hobby imo.

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I found a r9 290 with aftermarket cooler on it, good deal? I'll probably use a SSD I currently have for one of my computer and get a 1TB HDD for $60 to replace the SSD

Edit, should I use a SSD for OS(mining machine) or use a HDD aka NAS? But not sure what HDD are NAS or designed for 24/7 operation...

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