Can someone tell me, why GPU mining is better then CPU mining?? It's so strangely, i think.
GPUs can perform 'stupid' operations faster while consuming far less energy in the process. Graphics operations are - computational-wise - rather boring and simple operations. When they're configured to perform the mining algorithms, they outperform CPUs easily. But ASICs are even better. They're specifically designed to do those calculations and consume even less energy.
And the more specific the circuitry becomes, the faster it becomes obsolete and depreciates in value.