I know undervolting can be tricky. Honestly, I don't go overboard with the Trixx program, I use it a lot of time, just to see which card is located in whatever slot, and adjust the temperature profiles for each card. On my R9 280X toxics, you can really overclock them, but boy they do use a lot of juice. I just sort of tweak them all, but I'm very conservative with the adjustments. The R9 Series are my favorite cards though. The 7970s really are cheap though now, and are still a good decent board, probably the best bang for your buck for someone starting out. Someday I am going to get a R9 290x, but right now, I'm just trying to pay bills. Oh, I forgot to tell you, that I just downloaded AMDs new drivers as of July 29th, and they work fine, I tried them out on my 4 machines.
I'm still trying to see the advantages of dashminer.com vs X I like them both! I'm concerned with the volatility of dashminer's payout system, I wish it was more stable. However, I love the simplicity of the website, and it's fast payout system and a new miner system. I think it's got huge potential. X is a great place also, they have great customer service, and it seems like they have good payouts, I'm trying to do a comparison with power consumption between the two. It may take me a while to crunch the data, but dashminer's program maybe burning up equipment thus, the extra cost of equipment vs a cooler system. Anyway, working from home today, it's going to be a good day.....