CUDA-Accelerated Geodesic Ray-Tracing for Fiber Tracking

Table 3

Benchmark results for GPU and CPU implementation of the geodesic ray-tracing algorithm. For each configuration, we show the running time (T) in seconds, and the Speed-Up factor (SU) relative to the best CPU timing, see Figure 7.

	CPU	FX 770M		8800 GT		GTX 260		GTX 470
Number of seeds	T	T	SU	T	SU	T	SU	T	SU
1024	1.403	0.761	1.8	0.273	5.1	0.225	6.2	0.087	16.1
2048	2.788	1.388	2.0	0.448	6.2	0.244	11.4	0.093	30.0
3072	4.185	1.995	2.1	0.760	5.5	0.256	16.3	0.107	39.1
4096	5.571	2.772	2.0	0.900	6.2	0.301	18.5	0.139	40.0