Koss chuckled when asked to name the poorest performing GPU he's seen on the network. "I saw a Radeon X1600, which I think came out in 2002," he told HPCwire. "We round to the nearest 1/10th of a megahash per second, which is the unit used for Bitcoin mining, and it scored a 0.0. It produced nothing…." At the other end is the AMD Radeon HD7970, which generates the highest revenue; "I think that one makes $3.15 a day right now," he said.
X1600: Hah!
HD7970: $3.15/day....gross or profit?