1600 Mhash/s - 1x7950, 2x 7870, 1x5770
That's impossible. What you're getting is probably 1600 kilo hash which is only 1.6 mega hashes which is nothing.
I'm shocked at how 90% of the people here can't tell the difference. 1,000 kilo hashes is just 1 mega hash. The best ATI card at frys, the 7970 (they don't yet carry the 7990) only does 600-700 kilo hashes. And when you run these cards together you lose efficiencies.
The 7970 does 600 to 700 megahashes/sec for BTC mining. For LTC mining you will get roughly 600 to 700 kilohashes however.
You can refer to this chart for more details:
https://en.bitcoin.it/wiki/Mining_hardware_comparison#AMD_.28ATI.29So then 3 7970 cards wold generate 2.8 Gigahashes/sec for BTC mining? Whats that in actual mined coins? like a BTC a day? Cause that would be definetlly worth the expense of 500$ plus a card.
Have you heard of the new Intel technology coming out, the PHI it's called I believe, I hear its supposed to be an insanely fast GPU, something straight out of Star Trek's Data's own positronic brain !!! its gonna clock in at ONE TERAFLOP!!! but is that floating point or linear mathematics... Well have to wait and see but the problem is that as soon as a fast card comes out, BTC difficulty adds a few more zeroes. Way can this be easy, like in 2011 lol.