Table 2: Performance comparison between optimized GPU solution on Quadro FX 5800 and parallel CPU solution on E5540 with fixed .

CPUGPUSpeedup

245760 0.58 0.46 1.26
491520 1.23 0.90 1.36
737280 1.95 1.27 1.54
983040 3.27 1.89 1.73
1228800 4.66 2.06 2.26