Bitcoin Forum

just wondering if this is a good idea I am interested in build 4 7970 quad rigs for 4000. is this a good investment and will it return profit

It's always good for video game :o

for me, I don't think I can make a return from GPU investment after the difficulty level this high.

Are you going BTC or alt?

was thinking btc but ltc sounds interesting too

If you are truly interested in mining bitcoin skip the GPU and invest in ASICS. Spend as much many as you can on pre-order Avalon Asics and get a board member to build you a rig.

I would use the Bitcoin Mining Profitability Calculator http://www.bitcoinx.com/profit/ (http://www.bitcoinx.com/profit/)

Based off of your initial cost $4000 (assuming that you don't have to buy extra equipment), an average of 685MH/s a card (if you OC a little), the current difficulty. You're looking at 0.153 BTC/24h, and running 1000W (max), it would take you a year to generate that back.

I think it's worth doing, gpu rigs are versatile and you could switch to other coins as needed. You will get your money back eventually, just build them as energy efficient as possible with gold+ psu. I would stay away from bitcoins, that's not a good use of a gpu rig, try LTC.

It only makes sense if BTC appreciates significantly or you'll be able to send the cards back at 50-70% of their cost in 9-12 months.