./reduction Starting... Using Device 0: GeForce GTX 460 Reducing array of type int 16777216 elements 256 threads (max) 64 blocks Reduction, Throughput = 98.1856 GB/s, Time = 0.00068 s, Size = 16777216 Elements, NumDevsUsed = 1, Workgroup = 256 GPU result = 2136936220 CPU result = 2139353471 FAILED Press to Quit... -----------------------------------------------------------