Quote from: mnx on May 24, 2013, 12:59:21 PM

Does it make much sense to build a dedicated GPU rig at this point in time? I calculated a simple payoff of 5 months (which sounds good) for a rig that I'd build, but with BTC difficulty increasing at 10%/week it looks like it might never pay itself off.

Thoughts?

Also while I am posting, is a 650W gold PS enough to power a rig with 2 7950's? (my current 7950 appears to draw ~200W). I think the extra 200W should be enough to power the rest of the PC components...

7950s atleast in my experience pull about 300W each.. so it would be close with 2 7950s + CPU and HD.. might be ok if you went the linux route and used a USB to boot.

BTW i would not mine BTC, just will never keep up with the FPGs or ASIC miners. Mine LTC/or some other scrypt, then convert it to BTC.

I started with 4 rigs of 2 GPUs in each. Spent $4000 on the whole setup. 1st month made $1700, 2nd month I am working towards a goal of about $1500. So I project the 3rd month I will start making money on this project of mine.